[CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[henry ritzlmayr]

Am Dienstag, den 10.06.2008, 22:54 -0700 schrieb John R Pierce:
> Ruslan Sivak wrote:
> > John R Pierce wrote:
> >>
> >> whats cat /proc/meminfo   say?
> >>
> > # cat /proc/meminfo
> > MemTotal:  6104064 kB
> > ...
> > HighTotal:   0 kB
> > HighFree:0 kB
> > LowTotal:  6104064 kB
> > LowFree:   1992580 kB
> > ...
> 
> > Linux version 2.6.18-53.1.21.el5xen ([EMAIL PROTECTED]) 
> > (gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)) #1 SMP Tue May 20 
> > 10:03:27 EDT 2008
> > BIOS-provided physical RAM map:
> > Xen:  - 0001ef8fb000 (usable)
> that range is about 7.9 GiBytes, so the rest is getting lost somewhere. 
> 
> I'm unfamiliar with Xens innards..

How many VMs are running and how much memory do they consume?

This memory is not shown in DOM0 any more. 

The total memory should be visible within xentop.

wkr
Henry


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Re: [CentOS] top in xen

[Tim Verhoeven]

On Wed, Jun 11, 2008 at 2:31 AM, Robert - elists <[EMAIL PROTECTED]> wrote:
> I haven't setup a xen box yet
>
> Will try tonight.
>
> Was wondering, what does top look like on a dual processor xen box in a
> virtual ?
>
> Do you see more than one processor or is it configurable from the xen master
> or?

In de xen config you can specify a amount of virtual cpu's the guest
will see. By default it will get only one. But you can give it more.

Regards,
Tim

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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[Tim Verhoeven]

On Wed, Jun 11, 2008 at 9:04 AM, henry ritzlmayr <[EMAIL PROTECTED]> wrote:
>
> How many VMs are running and how much memory do they consume?
>
> This memory is not shown in DOM0 any more.
>
> The total memory should be visible within xentop.

Or with :

# virsh nodeinfo
CPU model:   x86_64
CPU(s):  4
CPU frequency:   2333 MHz
CPU socket(s):   2
Core(s) per socket:  2
Thread(s) per core:  1
NUMA cell(s):1
Memory size: 10484736 kB

Regards,
Tim

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Re: [CentOS] Not seeing all memory in CentOS 5.1 x86_64

[Akemi Yagi]

On Tue, Jun 10, 2008 at 7:50 PM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
> Akemi Yagi wrote:
>>
>> Wonder if this is related to a known issue with the xen kernel.
>>
>> http://www.centos.org/modules/newbb/viewtopic.php?topic_id=12491&forum=38
>>
>> Or
>>
>> http://bugs.centos.org/view.php?id=1905
>>
>> You might want to try the grub with a patch offered in there.
>>
>> Akemi
>
> Thank you, I will try that tomorrow.  Does anyone know if this is fixed in
> 5.2?
> Russ

This bug is being tracked at:

https://bugzilla.redhat.com/show_bug.cgi?id=445893

It is apparently not fixed in 5.2.  It you are affected by this bug,
using the grub offered above is the best solution at this moment.  If
your issue is something else, you might still want to give a newer
(test) kernel a try.  Someone got a slightly better result that way
(see comment #3 of the bugzilla).

Akemi
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[CentOS] RHEL/CentOS5.2 and rsyslogd

[Laurence Alexander Hurst]

Hi there,
I am slightly confused by the RHEL release notes and an earlier thread 
here about rsyslogd, so I hope someone can clear this up for me;


I see that rsyslog is included in RHEL as of 5.2 (and so will be 
available in CentOS when 5.2 is ready) however there is no indication of 
whether it has been made the default syslogger or not - is it an 
optional package or installed by default on a fresh install? (I would 
check myself, but I do not have any RHEL5 machines to hand.)


Thanks
-Laurence
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Re: [CentOS] RHEL/CentOS5.2 and rsyslogd

[Mogens Kjaer]

Laurence Alexander Hurst wrote:
...
I see that rsyslog is included in RHEL as of 5.2 (and so will be 
available in CentOS when 5.2 is ready) however there is no indication of 
whether it has been made the default syslogger or not - is it an 
optional package or installed by default on a fresh install? 


It is not installed on a RHEL 5.2 machine upgraded from 5.1,
don't know about a fresh install.

Mogens

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[CentOS] Could this be an advantage of CentOS over the PNAELV distribution?

[Luigi Perroti]

Hello all,

I understand that when releasing updates the CentOS team strips logos
and such things from the upstream sources.
If I'm not mistaken there is also a certain QA process going on before
the actual releases, at least for major updates like the upcoming 5.2
version.

Does this happen also for security updates?


Since I don't mind the small delay from the upstream releases I was
wondering if the additional QA process could actually be an advantage
over the PNAELV distribution.
This could be even more true if the QA isn't only related to CentOS
specific changes but it's done even for practically untouched updates.

Is this assumption correct?


Thanks for reading,
Luigi
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Re: [CentOS] RHEL/CentOS5.2 and rsyslogd

[Ralph Angenendt]

Laurence Alexander Hurst wrote:
> Hi there,
> I am slightly confused by the RHEL release notes and an earlier thread  
> here about rsyslogd, so I hope someone can clear this up for me;
>
> I see that rsyslog is included in RHEL as of 5.2 (and so will be  
> available in CentOS when 5.2 is ready) however there is no indication of  
> whether it has been made the default syslogger or not - is it an  
> optional package or installed by default on a fresh install? 

It is an optional install which can be installed alongside sysklogd.

So if you want to use it you have to disable or uninstall sysklogd and
install and enable rsyslogd.

Cheers,

Ralph


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[CentOS] CentOS-announce Digest, Vol 40, Issue 5

[centos-announce-request]

Send CentOS-announce mailing list submissions to
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Today's Topics:

   1. CESA-2008:0529 Moderate CentOS 3 i386 net-snmp -  security
  update (Tru Huynh)
   2. CESA-2008:0529 Moderate CentOS 3 x86_64 net-snmp  - security
  update (Tru Huynh)
   3. CESA-2008:0528-01: Moderate CentOS 2 i386 ucd-snmp security
  update (John Newbigin)


--

Message: 1
Date: Tue, 10 Jun 2008 22:39:52 +0200
From: Tru Huynh <[EMAIL PROTECTED]>
Subject: [CentOS-announce] CESA-2008:0529 Moderate CentOS 3 i386
net-snmp -  security update
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"

CentOS Errata and Security Advisory CESA-2008:0529

net-snmp security update for CentOS 3 i386:
https://rhn.redhat.com/errata/RHSA-2008-0529.html

The following updated file has been uploaded and is currently syncing to
the mirrors:

i386:
updates/i386/RPMS/net-snmp-5.0.9-2.30E.24.i386.rpm
updates/i386/RPMS/net-snmp-devel-5.0.9-2.30E.24.i386.rpm
updates/i386/RPMS/net-snmp-libs-5.0.9-2.30E.24.i386.rpm
updates/i386/RPMS/net-snmp-perl-5.0.9-2.30E.24.i386.rpm
updates/i386/RPMS/net-snmp-utils-5.0.9-2.30E.24.i386.rpm

source:
updates/SRPMS/net-snmp-5.0.9-2.30E.24.src.rpm

You may update your CentOS-3 i386 installations by running the command:

yum update net-snmp

Tru
-- 
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http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B
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Message: 2
Date: Tue, 10 Jun 2008 22:41:28 +0200
From: Tru Huynh <[EMAIL PROTECTED]>
Subject: [CentOS-announce] CESA-2008:0529 Moderate CentOS 3 x86_64
net-snmp- security update
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"

CentOS Errata and Security Advisory CESA-2008:0529

net-snmp security update for CentOS 3 x86_64:
https://rhn.redhat.com/errata/RHSA-2008-0529.html

The following updated file has been uploaded and is currently syncing to
the mirrors:

x86_64:
updates/x86_64/RPMS/net-snmp-5.0.9-2.30E.24.x86_64.rpm
updates/x86_64/RPMS/net-snmp-devel-5.0.9-2.30E.24.x86_64.rpm
updates/x86_64/RPMS/net-snmp-libs-5.0.9-2.30E.24.i386.rpm
updates/x86_64/RPMS/net-snmp-libs-5.0.9-2.30E.24.x86_64.rpm
updates/x86_64/RPMS/net-snmp-perl-5.0.9-2.30E.24.x86_64.rpm
updates/x86_64/RPMS/net-snmp-utils-5.0.9-2.30E.24.x86_64.rpm

source:
updates/SRPMS/net-snmp-5.0.9-2.30E.24.src.rpm

You may update your CentOS-3 x86_64 installations by running the command:

yum update net-snmp

Tru
-- 
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http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B
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Message: 3
Date: Wed, 11 Jun 2008 09:24:29 +1000
From: John Newbigin <[EMAIL PROTECTED]>
Subject: [CentOS-announce] CESA-2008:0528-01: Moderate CentOS 2 i386
ucd-snmp security update
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

The following errata for CentOS-2 have been built and uploaded to the
centos mirror:

RHSA-2008:0528-01 Moderate: ucd-snmp security update

Files available:
ucd-snmp-4.2.5-8.AS21.7.i386.rpm
ucd-snmp-devel-4.2.5-8.AS21.7.i386.rpm
ucd-snmp-utils-4.2.5-8.AS21.7.i386.rpm

More details are available from the RedHat web site at
https://rhn.redhat.com/errata/rh21as-errata.html

The easy way to make sure you are up to date with all the latest patches
is to run:
# yum update

-- 
John Newbigin
ITS Senior Analyst / Programmer
Faculty of Information and Communication Technologies
Swinburne University of Technology
Melbourne, Australia
http://www.ict.swin.edu.au/staff/jnewbigin










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End of CentOS-announce Digest, Vol 40, Issue 5

Re: [CentOS] Excluded files from repos?

[Sam Drinkard]

Lanny Marcus wrote:

On 6/10/08, Sam Drinkard <[EMAIL PROTECTED]> wrote:
  

Ralph Angenendt wrote:


Sam Drinkard wrote:

  

Ok.. I'm way behind the 8-ball on setting things up correctly, but after
going over the protection things in yum, I ran a yum check-update and it
returned with having 318 files excluded because of protection.  Is that
too high a number?  I have the numerical protection set to 1.  Is there
a good tutorial about how to correctly set up the protect base.



I'd go with the priorities plugin.

Everything about Repositories, Protectbase, Priorities and more at:



Cheers,

Ralph


  

Just to be on the safe side, I installed both plugins and have them
configured now.  FWIW, I did a yum check-update and for some unknown
reason, I got no dependency issues and nothing was tagged for update!
Surely the addition of the protectbase and priorities plugins didn't do
that???

I appreciate all you all have responded, and apologize for the lame
questions.  Time for me to do some more list reading I suppose.



Sam: Having both plugins installed is probably *not* a good thing to
do. As was previously suggested, probably best to go with Priorities.
Read this page:

I think the number of Packages being excluded (318) is in the ballpark.
73, Lanny
Thanks for the tip Lanny.  Just set it up and will let it fly with 
priorities only.


Sam


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[Fwd: Re: [CentOS] School Server Setup]

[Alain Terriault]

Hi Harry,

Has much has I like Centos and RH for big sophisticated setup, it would 
not be my first choice for your project.


For 25 systems and if you want this done without spending to much time, 
Clarkconnect would by my first choice for server side OS (#2 would be SME).


For me CentOS x64 is #1 choice for enterprise (+500 users with Terabytes 
of storage ) sever solution.
If you have little experience configuring a RH server, get ready to 
spend lots of time getting everything going as nicely as Clarkconnect 
does it.


For the clients side, my favorite flavor of Linux is Ubuntu.

cheers,
alain

Harry Sukumar wrote:


Hello All!!!

I was wondering if you can help me little bit….

I am trying to help (voluntary service) a country side school 
(Aboriginal community) in Northern Queensland Australia setup lab 
infrastructure, it’s a very remote school and they don’t have enough 
funds to go commercial


The school has only till grade 6

They have 25 machines that was bought out of the government grant but 
none of the machines come with windows


I was asked by the school president to setup lab infrastructure 
currently they have Internet (Dynamic) with only two machines connected


I have asked them to change the plan to Static IP address which I 
presume will be done some time this week


I have decided to go Linux on all the machines including the server

Could some one please cast some light on how I can carry on with this 
project, I am not sure where to start and I am fairly new to Linux and 
system administration world


Currently what’s in my mind is to setup fedora on all desktop and 
CentOS5 as my server with following services configured


Proxy-squid (all the traffic to pass through)

Firewall

Apache

Squirrel mail

DNS

DHCP

I am not sure where to start with this project

Your help will be highly appreciated by the little kids who have never 
even touched a computer before in there life!!!


--

Many Thanks

Harry



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Re: [Fwd: Re: [CentOS] School Server Setup]

[Ralph Angenendt]

Alain Terriault wrote:
> For 25 systems and if you want this done without spending to much time,  
> Clarkconnect would by my first choice for server side OS (#2 would be 
> SME).
[...]
> For the clients side, my favorite flavor of Linux is Ubuntu.

For trees my favourite color is green, while for fire engines it is red.

This is something you don't have to back up with some arguments, as a
non-green tree (at least from spring to fall) doesn't look that healthy
and who has ever heard of a yellow fire engine?

Your case up there looks a bit different: It is easy to say that those
are your favourite flavors - but can you substantiate that somehow?
Especially as ClarkConnect and SME are based (or at least were based) on
CentOS but mostly lack a large community behind them -> Vendor Lock-In. 

Ralph


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RE: [Fwd: Re: [CentOS] School Server Setup]

[[EMAIL PROTECTED]]

Alain Terriault <> scribbled on Wednesday, June 11, 2008 3:55 PM:

How do you mean "big sophisticated setup"? 

I think CentOS is rather easy to setup, in fact CentOS was the OS of choice 
when I first started with linux. I'm not fishing for flaming or trolling, just 
curious on why you think like you do. 8-)


> Hi Harry,
> 
> Has much has I like Centos and RH for big sophisticated setup, it would
> not be my first choice for your project.
> 
> For 25 systems and if you want this done without spending to much time,
> Clarkconnect would by my first choice for server side OS (#2 would be SME).
> 
> For me CentOS x64 is #1 choice for enterprise (+500 users with Terabytes
> of storage ) sever solution.
> If you have little experience configuring a RH server, get ready to
> spend lots of time getting everything going as nicely as Clarkconnect
> does it.
> 
> For the clients side, my favorite flavor of Linux is Ubuntu.
> 
> cheers,
> alain
> 
> Harry Sukumar wrote:
>> 
>> Hello All!!!
>> 
>> I was wondering if you can help me little bit….
>> 
>> I am trying to help (voluntary service) a country side school
>> (Aboriginal community) in Northern Queensland Australia setup lab
>> infrastructure, it’s a very remote school and they don’t have enough funds
>> to go commercial 
>> 
>> The school has only till grade 6
>> 
>> They have 25 machines that was bought out of the government grant but
>> none of the machines come with windows
>> 
>> I was asked by the school president to setup lab infrastructure
>> currently they have Internet (Dynamic) with only two machines connected
>> 
>> I have asked them to change the plan to Static IP address which I
>> presume will be done some time this week
>> 
>> I have decided to go Linux on all the machines including the server
>> 
>> Could some one please cast some light on how I can carry on with this
>> project, I am not sure where to start and I am fairly new to Linux and
>> system administration world 
>> 
>> Currently what’s in my mind is to setup fedora on all desktop and
>> CentOS5 as my server with following services configured
>> 
>> Proxy-squid (all the traffic to pass through)
>> 
>> Firewall
>> 
>> Apache
>> 
>> Squirrel mail
>> 
>> DNS
>> 
>> DHCP
>> 
>> I am not sure where to start with this project
>> 
>> Your help will be highly appreciated by the little kids who have never
>> even touched a computer before in there life!!!
>> 
>> --
>> 
>> Many Thanks
>> 
>> Harry
>> 
>> 
>> 
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> 
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Re: [Fwd: Re: [CentOS] School Server Setup]

[Matt Hyclak]

On Wed, Jun 11, 2008 at 04:07:48PM +0200, Ralph Angenendt enlightened us:
> This is something you don't have to back up with some arguments, as a
> non-green tree (at least from spring to fall) doesn't look that healthy
> and who has ever heard of a yellow fire engine?
>

Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) all
an awful shade of fluorescent yellow :-)

Matt

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Department of Social Work
Ohio University
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Re: [Fwd: Re: [CentOS] School Server Setup]

[Ralph Angenendt]

Matt Hyclak wrote:
> On Wed, Jun 11, 2008 at 04:07:48PM +0200, Ralph Angenendt enlightened us:
> > This is something you don't have to back up with some arguments, as a
> > non-green tree (at least from spring to fall) doesn't look that healthy
> > and who has ever heard of a yellow fire engine?
> 
> Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) all
> an awful shade of fluorescent yellow :-)

I now officially hate you, because you broke my brilliantly laid out
retort.

Ralph


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Re: [Fwd: Re: [CentOS] School Server Setup]

[David Williams]

>
>
>
> Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were)
> all
> an awful shade of fluorescent yellow :-)
>
>

Safty first...
http://www.psychologymatters.org/solomon.html


...and not "all" trees are green in the spring and summer. ;)
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Re: [Fwd: Re: [CentOS] School Server Setup]

[John Plemons]

Given the cost and ease of setup, CentOS is a great choice, using one of 
the machines as a server and the other as clients. CentOS is very 
robust, and can be configured for one machine to hundreds, so to ear 
mark it as only a Enterprise package is wrong, and no there isn't a 
great deal of setup involved.  With the tools that come with the package 
a working server can easily be configured and running in a afternoon, so 
the task isn't all that tough.  Plus you have the wealth of the CentOS 
community to help if you get in trouble.


That's my nickels worth, you can keep the extra three cents...

john plemons






Ralph Angenendt wrote:

Alain Terriault wrote:
  
For 25 systems and if you want this done without spending to much time,  
Clarkconnect would by my first choice for server side OS (#2 would be 
SME).


[...]
  

For the clients side, my favorite flavor of Linux is Ubuntu.



For trees my favourite color is green, while for fire engines it is red.

This is something you don't have to back up with some arguments, as a
non-green tree (at least from spring to fall) doesn't look that healthy
and who has ever heard of a yellow fire engine?

Your case up there looks a bit different: It is easy to say that those
are your favourite flavors - but can you substantiate that somehow?
Especially as ClarkConnect and SME are based (or at least were based) on
CentOS but mostly lack a large community behind them -> Vendor Lock-In. 


Ralph
  



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Re: [Fwd: Re: [CentOS] School Server Setup]

[Matt Hyclak]

On Wed, Jun 11, 2008 at 04:22:03PM +0200, Ralph Angenendt enlightened us:
> Matt Hyclak wrote:
> > On Wed, Jun 11, 2008 at 04:07:48PM +0200, Ralph Angenendt enlightened us:
> > > This is something you don't have to back up with some arguments, as a
> > > non-green tree (at least from spring to fall) doesn't look that healthy
> > > and who has ever heard of a yellow fire engine?
> > 
> > Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) all
> > an awful shade of fluorescent yellow :-)
> 
> I now officially hate you, because you broke my brilliantly laid out
> retort.

Someone had to :-)

If it makes you feel any better, it looks like they've switched back to Red.

Matt

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Department of Social Work
Ohio University
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[CentOS] OT - host/asset tracking

[Mark Belanger]

Can anyone recommend something for tracking assets
particularly computer.  I'm looking  to capture:
hostname
OS/arch
Hardware info(cpu, mem, etc)
Function(i.e. what is the machine used for)

-Mark
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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[Ruslan Sivak]

Tim Verhoeven wrote:

On Wed, Jun 11, 2008 at 9:04 AM, henry ritzlmayr <[EMAIL PROTECTED]> wrote:
  

How many VMs are running and how much memory do they consume?

This memory is not shown in DOM0 any more.

The total memory should be visible within xentop.



Or with :

# virsh nodeinfo
CPU model:   x86_64
CPU(s):  4
CPU frequency:   2333 MHz
CPU socket(s):   2
Core(s) per socket:  2
Thread(s) per core:  1
NUMA cell(s):1
Memory size: 10484736 kB

Regards,
Tim

  
While it seems to make sense (and both xentop and virsh nodeinfo) show 
the right amount of memory, even when I shut down one of the VM's, free 
and top still think I only have 6GB of ram.


Russ

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Re: [CentOS] OT - host/asset tracking

[John Plemons]

Why not setup a simple DB, or use a spread sheet...  Open Office should 
have the tools you need


john plemons







Mark Belanger wrote:

Can anyone recommend something for tracking assets
particularly computer.  I'm looking  to capture:
hostname
OS/arch
Hardware info(cpu, mem, etc)
Function(i.e. what is the machine used for)

-Mark
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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[Tim Verhoeven]

On Wed, Jun 11, 2008 at 4:46 PM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
>
> While it seems to make sense (and both xentop and virsh nodeinfo) show the
> right amount of memory, even when I shut down one of the VM's, free and top
> still think I only have 6GB of ram.

That is normal, the memory that was used by VM's is not automatically
returned to the dom0 and therefore won't show when running free and
top.

Regards,
Tim

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Hoping the problem magically goes away by ignoring it is the
"microsoft approach to programming" and should never be allowed.
(Linus Torvalds)
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Re: [CentOS] OT - host/asset tracking

[Matt Hyclak]

On Wed, Jun 11, 2008 at 10:46:05AM -0400, Mark Belanger enlightened us:
> Can anyone recommend something for tracking assets
> particularly computer.  I'm looking  to capture:
> hostname
> OS/arch
> Hardware info(cpu, mem, etc)
> Function(i.e. what is the machine used for)
> 

OCS might be a little more than what you want, but is a possibility. 

http://www.ocsinventory-ng.org/

Matt

-- 
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Department of Mathematics 
Department of Social Work
Ohio University
(740) 593-1263
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Re: [CentOS] OT - host/asset tracking

[Mark Belanger]

John Plemons wrote:
Why not setup a simple DB, or use a spread sheet...  Open Office should 
have the tools you need


Easily done of course.  I was thinking a simple web based asset tracker
may save a little wheel-reinvention and give me a few nice reports for
the suits.

-Mark
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Re: [CentOS] Excluded files from repos?

[Ray Leventhal]

I think the number of Packages being excluded (318) is in the ballpark.
73, Lanny
___
  
OT, but wow, Lanny.  I haven't seen Phillips code in years :)  Thanks 
for the nostalgia!


73/30
-R
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Re: [CentOS] OT - host/asset tracking

[Max Hetrick]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Mark Belanger wrote:
> Can anyone recommend something for tracking assets
> particularly computer.  I'm looking  to capture:
> hostname
> OS/arch
> Hardware info(cpu, mem, etc)
> Function(i.e. what is the machine used for)


I use GLPI:



You can do software, contracts, licenses, suppliers, and contacts as
well as all the hardware categories.

Regards,
Max


- --
# find . "*imbecile" -exec sed -ie "s/stupidity/commonsense/g" '{}' \;
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.5 (GNU/Linux)

iD8DBQFIT+6fIXSX/6LmsXkRArUuAKCSmWLVvDDLplkV1wWkPvbEchfXpQCdGvYL
Obef2Knfz0Ef9RvwdmOdMyo=
=ResA
-END PGP SIGNATURE-
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Re: [Fwd: [CentOS] School Server Setup]

[Kai Schaetzl]

Matt Hyclak wrote on Wed, 11 Jun 2008 10:18:25 -0400:

> Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) all
> an awful shade of fluorescent yellow :-)

I'm sure that's why he wrote "*favorite* color" ;-)

Kai

-- 
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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[Ruslan Sivak]

Tim Verhoeven wrote:

On Wed, Jun 11, 2008 at 4:46 PM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
  

While it seems to make sense (and both xentop and virsh nodeinfo) show the
right amount of memory, even when I shut down one of the VM's, free and top
still think I only have 6GB of ram.



That is normal, the memory that was used by VM's is not automatically
returned to the dom0 and therefore won't show when running free and
top.

Regards,
Tim

  
I guess it has something to do with the ballooning driver for Dom0.  It 
looks like I just tried to allocation too much memory to DomU and the 
box went down hard.  I think there's a setting in xen to the min amount 
of memory to go down to, but I'm not sure why Dom0 is using 600mb of 
RAM.  Is there a mini installation of CentOS that I can do that would 
use less RAM?  I've already unchecked all the boxes when installing 
CentOS. I would like Dom0 to be as small as possible, both due to RAM 
usage and from a security perspective. 


Russ
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Re: [CentOS] Apache jserv monitoring?

[Sean Carolan]

> Sounds similar to the mod_jk connector in apache to connect to
> tomcat. When I had to deal with this I setup a dedicated apache
> instance on each system running tomcat whose sole purpose for
> existence was for testing that connector.
>
> So say setup an apache instance on another port, and have it
> direct all traffic back to mod_jserv, then hit the apache
> instance with http. It's not perfect but at least for me apache
> was a lot more stable than tomcat especially in such a basic
> configuration, so it worked well as a way to test the health
> of the mod_jk connector.

Excellent idea, Nate.  I already have apache installed on all these
servers, so it should be fairly trivial to set up a local test site
just for this purpose.  I'm going to test this out in our lab
environment today and see how it performs.
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[CentOS] Bind Standard Practise

[Joseph L. Casale]

In a chroot Bind installation, named.conf is located in /var/named/chroot/etc/.
In that file, references to files for includes and other zones can be made as 
"filename"
without a path. What is the expected location when no path is used, simply up 
one dir
under chroot/? While moving a DNS from one machine to another, I noticed all 
ref's are
"/etc/filename" and they are in the same dir as named.conf which obviously 
looks different
from all the sample files.

Thanks!
jlc
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[CentOS] RE: Bind Standard Practise

[Joseph L. Casale]

>In a chroot Bind installation, named.conf is located in /var/named/chroot/etc/.
>In that file, references to files for includes and other zones can be made as 
>"filename"
>without a path. What is the expected location when no path is used, simply up 
>one dir
>under chroot/? While moving a DNS from one machine to another, I noticed all 
>ref's are
>"/etc/filename" and they are in the same dir as named.conf which obviously 
>looks different
>from all the sample files.

Jumped the gun there:)
options
{
directory "/var/named"; // the default
};

CMIIW, so when not using a path, this is where it expects files.
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Re: [CentOS] Excluded files from repos?

[Lanny Marcus]

On 6/11/08, Ray Leventhal <[EMAIL PROTECTED]> wrote:
>> I think the number of Packages being excluded (318) is in the ballpark.
>> 73, Lanny
>> ___
>>
> OT, but wow, Lanny.  I haven't seen Phillips code in years :)  Thanks
> for the nostalgia!
>
> 73/30
> -R
Ray: I noticed from his email address that he's an amateur radio
operator (Ham).
73 = "Best Regards" for Ham Radio Operators. I learned the Morse Code
when I was 11 years old and I can still use it. Lanny
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Re: [CentOS] RE: Bind Standard Practise

[Craig White]

On Wed, 2008-06-11 at 09:53 -0600, Joseph L. Casale wrote:
> >In a chroot Bind installation, named.conf is located in 
> >/var/named/chroot/etc/.
> >In that file, references to files for includes and other zones can be made 
> >as "filename"
> >without a path. What is the expected location when no path is used, simply 
> >up one dir
> >under chroot/? While moving a DNS from one machine to another, I noticed all 
> >ref's are
> >"/etc/filename" and they are in the same dir as named.conf which obviously 
> >looks different
> >from all the sample files.
> 
> Jumped the gun there:)
> options
> {
> directory "/var/named"; // the default
> };
> 
> CMIIW, so when not using a path, this is where it expects files.

relative the chroot path of course

Craig

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Re: [CentOS] Apache jserv monitoring?

[Ray Leventhal]

Sean Carolan wrote:

In our environment we have many legacy application servers running
apache/jserv.  There is a web server front end, then a couple of
load-balanced java servers on the backside.  One of the problems we
are faced with is hung or stuck jvms.  I have looked at the java
process with the ps command, and there are many times when URL(s) do
not respond, yet the java looks healthy, at least from the OS point of
view.  The usual cure for this situation is to restart the JVM, then
the URLs come right back up.

Are any of you aware of tools for monitoring apache jserv, either from
localhost or by connecting to port 8008 over the network?  I really
want to find out if there is a way to detect a "sick" JVM other than
getting a bunch of down URL alerts on my phone.
  
Being far from an expert, if restarting a service or script is what's 
needed, you might find SIM[1] helpful


YMMV,
-R

[1]http://rfxnetworks.com/sim.php
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[CentOS] Re: yum upgrade 4.3 -> current ?

[Scott Silva]

on 6-10-2008 11:10 PM Chris Boyd spake the following:


On Jun 10, 2008, at 6:40 PM, Scott Silva wrote:


python-sqlite-1.1.7-1.2.1.x86_64



ding ding ding!

Scott Silva wins a Prize!

That was the last key piece.


You know... that was in the thread you linked to in your first message...
Last paragraph.  You could have been done a week ago.





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Re: [CentOS] Apache jserv monitoring?

[Les Mikesell]

Sean Carolan wrote:

Sounds similar to the mod_jk connector in apache to connect to
tomcat. When I had to deal with this I setup a dedicated apache
instance on each system running tomcat whose sole purpose for
existence was for testing that connector.

So say setup an apache instance on another port, and have it
direct all traffic back to mod_jserv, then hit the apache
instance with http. It's not perfect but at least for me apache
was a lot more stable than tomcat especially in such a basic
configuration, so it worked well as a way to test the health
of the mod_jk connector.


Excellent idea, Nate.  I already have apache installed on all these
servers, so it should be fairly trivial to set up a local test site
just for this purpose.  I'm going to test this out in our lab
environment today and see how it performs.


If this is old enough to be running a Sun 1.4.x JVM and the web server 
generates images, there was a bug that caused the JVM itself to leak 
memory under certain circumstances.  I've forgotten the details but it 
was something like an unreleased file reference per image.


--
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   [EMAIL PROTECTED]


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Re: [CentOS] OT - host/asset tracking

[Karanbir Singh]

Mark Belanger wrote:

Can anyone recommend something for tracking assets
particularly computer. I'm looking to capture:
hostname
OS/arch
Hardware info(cpu, mem, etc)
Function(i.e. what is the machine used for)



How much of this could you get done with Smolt / Func ? The s/w is 
available in the testing repo for centos4/5 at the moment..

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[CentOS] Re: Required for CentOS4.4 ia64 Clustersuite package

[Scott Silva]

on 6-10-2008 11:59 PM Balaji spake the following:

Dear All,
 I am new in Itanium server Installation and I have installed all the 
CentOS4.4 ia64 CDs
 and kernel version is 2.6.9-42.EL and I need the Cluster Suite Package 
for the same.


 I tried to google-out and i can't find out the Clustersuite package for 
CentOS4.4 and

 I findout the CentOS4.5 Clustersuite package from CentOS Website
 can any one send me path of the Clustersuite package for CentOS4.4 ia64
 Please, do the needful.


Regards
-S.Balaji

I do believe that CentOS only builds the cluster suite for i686 and x86_64.
You might need to get the src rpms and do some work since I believe that IA64 
is a very low priority to CentOS. It is like PPC64 in that usually an OS comes 
with the hardware purchase, where you can get other processors OS free.


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Re: [Fwd: Re: [CentOS] School Server Setup]

[MHR]

On Wed, Jun 11, 2008 at 7:07 AM, Ralph Angenendt <[EMAIL PROTECTED]> wrote:
>
> For trees my favourite color is green, while for fire engines it is red.
>
> This is something you don't have to back up with some arguments, as a
> non-green tree (at least from spring to fall) doesn't look that healthy
> and who has ever heard of a yellow fire engine?
>

Well, actually, there was an experiment out here in the wild woolly
west of California where, for a year or so, new (?) fire engines were,
in fact, painted yellow.  It was a kind of dull yellow, not as bright
as a school bus, but my family always used to joke about the school
buses with sirens.  I haven't seen any in a while, although there are
some white ones, too.

Aside from the obvious deficiency, yellow has this unusual quality of
being invisible under certain types of low power street lamps

I guess some people just don't see red that well?

mhr
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[CentOS] Re: [Fwd: Re: School Server Setup]

[Scott Silva]

on 6-11-2008 7:07 AM Ralph Angenendt spake the following:

Alain Terriault wrote:
For 25 systems and if you want this done without spending to much time,  
Clarkconnect would by my first choice for server side OS (#2 would be 
SME).
I have to agree with Clarkconnect, except you can only have 10 mail users with 
the free version.

[...]

For the clients side, my favorite flavor of Linux is Ubuntu.


For trees my favourite color is green, while for fire engines it is red.

This is something you don't have to back up with some arguments, as a
non-green tree (at least from spring to fall) doesn't look that healthy
and who has ever heard of a yellow fire engine?

Here in California we have green fire engines (US Forestry) and red (burning) 
trees!

At least in the summer.  ;-P




Your case up there looks a bit different: It is easy to say that those
are your favourite flavors - but can you substantiate that somehow?
Especially as ClarkConnect and SME are based (or at least were based) on
CentOS but mostly lack a large community behind them -> Vendor Lock-In. 


SME has quite an array of addon packages. www.contribs.org.

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Re: [Fwd: Re: [CentOS] School Server Setup]

[MHR]

On Wed, Jun 11, 2008 at 7:22 AM, Ralph Angenendt <[EMAIL PROTECTED]> wrote:
> Matt Hyclak wrote:
>> On Wed, Jun 11, 2008 at 04:07:48PM +0200, Ralph Angenendt enlightened us:
>> > This is something you don't have to back up with some arguments, as a
>> > non-green tree (at least from spring to fall) doesn't look that healthy
>> > and who has ever heard of a yellow fire engine?
>>
>> Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) all
>> an awful shade of fluorescent yellow :-)
>
> I now officially hate you, because you broke my brilliantly laid out
> retort.
>
> Ralph
>

Well, you know that he has two strikes against him, now: yours and the
fact that he's from Columbus

mhr
(18 year resident of Ann Arbor, MI.  ;^)
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Re: [Fwd: Re: [CentOS] School Server Setup]

[MHR]

On Wed, Jun 11, 2008 at 7:11 AM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Alain Terriault <> scribbled on Wednesday, June 11, 2008 3:55 PM:
>
> How do you mean "big sophisticated setup"?
>
> I think CentOS is rather easy to setup, in fact CentOS was the OS of choice 
> when I first started with linux. I'm not fishing for flaming or trolling, 
> just curious on why you think like you do. 8-)
>
>

'ear, 'ear!

I dabbled in Linux for nine years, including a six month
semi-concerted effort to use SuSE/Novell Linux (for which I paid $40),
none of which did it for me.  CentOS, in one month, impressed me
enough to spend almost $400 to upgrade my primary home desktop
hardware so I could install CentOS and run a Windows VMWare guest on
it, and I've never been more delighted with a small system with huge
capabilities.  It was (and is) easy to install and easy to manage, and
the only real trouble I've had with the system has come from other,
non-CentOS related areas (including all the things that I thought were
CentOS problems...).

Them's my $0.03 (inflation, y'know...).

mhr
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Re: [CentOS] Re: [Fwd: Re: School Server Setup]

[MHR]

On Wed, Jun 11, 2008 at 9:51 AM, Scott Silva <[EMAIL PROTECTED]> wrote:
>
> Here in California we have green fire engines (US Forestry) and red
> (burning) trees!
> At least in the summer.  ;-P
>

Really?  Our trees burn yellow and black.  Of course, I'm in OC, which
is just too conservative to do anything right



mhr
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Re: [CentOS] OT - host/asset tracking

[Les Mikesell]

Max Hetrick wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Mark Belanger wrote:

Can anyone recommend something for tracking assets
particularly computer.  I'm looking  to capture:
hostname
OS/arch
Hardware info(cpu, mem, etc)
Function(i.e. what is the machine used for)



I use GLPI:



You can do software, contracts, licenses, suppliers, and contacts as
well as all the hardware categories.



Someone else mentioned ocsinventory-ng 
(http://www.ocsinventory-ng.org/), but to complete the picture, 
ocsinventory-ng includes agents for windows and linux that will 
automatically send each machine's hardware and software inventory to the 
server periodically and can be used to deploy packages so it is easier 
and more accurate than doing it by hand and will stay up to date.  GLPI 
is a more completed and detailed inventory system that can handle more 
than PCs, but it knows how to pull the data from ocsinventory when you 
use both.


Both are available via yum from these repositories (needs EPEL too) 
http://blog.famillecollet.com/post/2005/10/02/8-telechargement-installation-et-yum 
and they work fine in English even though the developers are French.


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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[MHR]

On Wed, Jun 11, 2008 at 8:36 AM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
>
> I guess it has something to do with the ballooning driver for Dom0.  It
> looks like I just tried to allocation too much memory to DomU and the box
> went down hard.  I think there's a setting in xen to the min amount of
> memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM.  Is
> there a mini installation of CentOS that I can do that would use less RAM?
>  I've already unchecked all the boxes when installing CentOS. I would like
> Dom0 to be as small as possible, both due to RAM usage and from a security
> perspective.

I've not familiarized myself with xen yet, but have you considered
VMware Server?  I haven't had any serious problems with it, and none
at all since v1.0.5 came out (1.0.6 is the current one).  Works
nicely, stays within its memory allocation, and top et al work as
you'd expect them to.

HTH

mhr
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Re: [CentOS] Re: Required for CentOS4.4 ia64 Clustersuite package

[John R Pierce]

Scott Silva wrote:

on 6-10-2008 11:59 PM Balaji spake the following:

Dear All,
 I am new in Itanium server Installation and I have installed all the 
CentOS4.4 ia64 CDs
 and kernel version is 2.6.9-42.EL and I need the Cluster Suite 
Package for the same.
I do believe that CentOS only builds the cluster suite for i686 and 
x86_64.
You might need to get the src rpms and do some work since I believe 
that IA64 is a very low priority to CentOS. It is like PPC64 in that 
usually an OS comes with the hardware purchase, where you can get 
other processors OS free.



indeed, if you have hardware that expensive, presumably being used in a 
cluster for something mission critical,  I would think you would want to 
stick with paid/supported RHEL + GCS.



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Re: [Fwd: Re: [CentOS] School Server Setup]

[John R Pierce]

MHR wrote:

Well, actually, there was an experiment out here in the wild woolly
west of California where, for a year or so, new (?) fire engines were,
in fact, painted yellow.  It was a kind of dull yellow, not as bright
as a school bus, but my family always used to joke about the school
buses with sirens.  I haven't seen any in a while, although there are
some white ones, too.
  


they were incredibly bright electric yellow-green around here for 
awhile... I remember CDF trucks painted that color in the 70s, anyways.

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RE: [Fwd: Re: [CentOS] School Server Setup]

[Alain Terriault, Mr.]

Little substance .. I have live and still working system with .. 

- Centos with +100 users, ldap (LAM), sendmail (or postfix), web, samba,
netatalk, dhcp .. all with certificates on a bunch of dell 1950 and
MD1000. Because it is scalable, stable 24/7 and for 100 users+ worth all
the time spending configuring it. The only problem with this setup are
kernel updates.. the only time I bring down the servers ;-)

- Clarkconnect (or SME) for small lab, because it is all done in 30
minutes and then you can easily give a "miniadmin" access to the lab
manager. They make nice, small, safe effective Gateway or server. 
They are not a sysadmin (shell) playing ground, 95% of the work is done
from the web interface, a little bit like webmin. Clark is commercial
but inexpensive and well supported. SME is free, but the config system
looks to much like the old Netinfo system from NextStep .. bring back
bad memory.

Try Clark, if it not what you are looking for, go with CentOS or RH they
are very stable and effective OS for server. It will require you more
time to get it all working properly. 
Sure you can install and create accounts in /etc/passwd in minutes ..
but if you want all the goodies and security (SSL, email, sasl, LDAP,
backup, raid ..) you are in for lots of fun (work).

- Workstations, Fedora or Ubuntu .. because I like having the most
up2date versions and goodies on my desktop for free. 

RedHat has nice educational discount, if I remember $50/workstation and
$200/server

Bonne chance,
alain





> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Ralph Angenendt
> Sent: Wednesday, June 11, 2008 10:08 AM
> To: centos@centos.org
> Subject: Re: [Fwd: Re: [CentOS] School Server Setup]
> 
> Your case up there looks a bit different: It is easy to say that those
> are your favourite flavors - but can you substantiate that somehow?
> Especially as ClarkConnect and SME are based (or at least were based)
> on CentOS but mostly lack a large community behind them -> Vendor
Lock-
> In.
> 
> Ralph
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Re: [CentOS] Could this be an advantage of CentOS over the PNAELV distribution?

[Johnny Hughes]

Luigi Perroti wrote:

Hello all,

I understand that when releasing updates the CentOS team strips logos
and such things from the upstream sources.
If I'm not mistaken there is also a certain QA process going on before
the actual releases, at least for major updates like the upcoming 5.2
version.

Does this happen also for security updates?


Yes, we QA every update.   However there is much less to look at when 
you are not doing several hundred packages at the same time.


We also do not have a Client and Server and Workstation and AS/WS/ES 
type structure ... or install numbers, etc.  So creating the compilation 
is complicated.


There is a combined comps.xml that has to be created which is 
significantly different than the upstream one.





Since I don't mind the small delay from the upstream releases I was
wondering if the additional QA process could actually be an advantage
over the PNAELV distribution.


Yes ... for example in the 5.2 QA process, we have already found and 
worked around several bugs ... like:


RHEL-5.2 rebased gtkhtml3 which renders custom software built against 
the old version useless until recompiled.  I have produced a 
compat-gtkhtml3 for CentOS-Extras.


There is a bug with nss_ldap and bash32 ... I created a new RPM for the 
nss_ldap that is currently in our testing repo.




This could be even more true if the QA isn't only related to CentOS
specific changes but it's done even for practically untouched updates.



Even if we don't change anything, we have to verify every binary because 
red hat does not release the "buildroot" logs for each RPM.  There are 
frequently "hidden build requirements" (that means things in the build 
root that are linked against, but not listed as a BuildRequires in the 
SRPM).  We find these by seeing what the upstream binaries link against 
and then adding them to our build root and rebuilding.



Is this assumption correct?



We check every binary, not just the changed ones ... because we rebuild 
everything and they all can have hidden build requirements.




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[CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[Henry Ritzlmayr]

Am Mittwoch, den 11.06.2008, 11:36 -0400 schrieb Ruslan Sivak:
> Tim Verhoeven wrote:
> > On Wed, Jun 11, 2008 at 4:46 PM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
> >   
> >> While it seems to make sense (and both xentop and virsh nodeinfo) show the
> >> right amount of memory, even when I shut down one of the VM's, free and top
> >> still think I only have 6GB of ram.
> >> 
> >
> > That is normal, the memory that was used by VM's is not automatically
> > returned to the dom0 and therefore won't show when running free and
> > top.
> >
> > Regards,
> > Tim
> >
> >   
> I guess it has something to do with the ballooning driver for Dom0.  It 
> looks like I just tried to allocation too much memory to DomU and the 
> box went down hard.  I think there's a setting in xen to the min amount 
> of memory to go down to, but I'm not sure why Dom0 is using 600mb of 
> RAM.  Is there a mini installation of CentOS that I can do that would 
> use less RAM?  I've already unchecked all the boxes when installing 
> CentOS. I would like Dom0 to be as small as possible, both due to RAM 
> usage and from a security perspective. 
> 
> Russ

The option you think of is called dom0-min-mem and can be found
in /etc/xen/xend-config.sxp
Regarding to a mini installation of CentOS - not that I know of, but you
must have some daemons running, since on my installations here DOM0 only
consumes 373MB and I have postfix running on DOM0 as well. 

Henry



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Re: [Fwd: Re: [CentOS] School Server Setup]

[Matt Hyclak]

On Wed, Jun 11, 2008 at 09:53:29AM -0700, MHR enlightened us:
> > Matt Hyclak wrote:
> >> On Wed, Jun 11, 2008 at 04:07:48PM +0200, Ralph Angenendt enlightened us:
> >> > This is something you don't have to back up with some arguments, as a
> >> > non-green tree (at least from spring to fall) doesn't look that healthy
> >> > and who has ever heard of a yellow fire engine?
> >>
> >> Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) 
> >> all
> >> an awful shade of fluorescent yellow :-)
> >
> > I now officially hate you, because you broke my brilliantly laid out
> > retort.
> >
> > Ralph
> >
> 
> Well, you know that he has two strikes against him, now: yours and the
> fact that he's from Columbus
> 
> mhr
> (18 year resident of Ann Arbor, MI.  ;^)

My wife's family is primarily from West Virginia, so Ann Arbor has two
strikes against it: the fact that it's Ann Arbor and Rich Rodriguez ;-)

I suppose that's off topic for here, though...

Matt

-- 
Matt Hyclak
Department of Mathematics 
Department of Social Work
Ohio University
(740) 593-1263
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Re: [CentOS] [Off Topic, kind of] eMachine model T5254

[Bob Taylor]

On Tue, 2008-06-10 at 14:41 -0500, Lanny Marcus wrote:
> On 6/10/08, Bob Taylor <[EMAIL PROTECTED]> wrote:
> > Best Buy currently has an eMachine on sale for less than $300.00
> > without monitor. I didn't see any recent complaints on

[snip]

> HW guru I am not. Linux guru I am not. I have a suggestion for you,
> which I believe is a valid one: Take a Knoppix Live CD (that you've
> previously tested on another box and know  is working properly) or a
> CentOS Live CD, with you to the store. Boot the box with it and see if
> the HW works with Linux, before you buy. Preferably, do this on *the*
> box you are going to buy, in case the HW in the floor sample and the
> one you are going to buy are not identical.

Sheesh! Gotta get my brain working properly! I should have thought of
that. Still thinking I have a dial up Internet connection.

> Sounds very cheap and I'd
> like to have one too.  Does Best Buy let one bring something back, for
> a refund, within a certain number of days, if they are not satisfied
> with the product?

Dunno. I would presume yes.

-- 
Bob Taylor

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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[Ruslan Sivak]

MHR wrote:

On Wed, Jun 11, 2008 at 8:36 AM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
  

I guess it has something to do with the ballooning driver for Dom0.  It
looks like I just tried to allocation too much memory to DomU and the box
went down hard.  I think there's a setting in xen to the min amount of
memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM.  Is
there a mini installation of CentOS that I can do that would use less RAM?
 I've already unchecked all the boxes when installing CentOS. I would like
Dom0 to be as small as possible, both due to RAM usage and from a security
perspective.



I've not familiarized myself with xen yet, but have you considered
VMware Server?  I haven't had any serious problems with it, and none
at all since v1.0.5 came out (1.0.6 is the current one).  Works
nicely, stays within its memory allocation, and top et al work as
you'd expect them to.

HTH

mhr
___
  
Are you talking about VMware Server 1?  Isn't there an issue with only 
being able to allocate 3.4GB of ram or something to that point?  I guess 
it wouldn't be an issue since I only have 8GB of ram on this box, unless 
I wanted to allocate a lot of ram to a single process.


I, too, like VMWare Server 1 and have been using it in production under 
windows.  Does it support paravirtualization at all? 

I treid, VMWare server 2 beta, and they made it pretty much unusable.  
The web interface isn't that great, and there is no way to tell it to 
use an LVM volume.  Hopefully they will improve it in the future. 

It's too bad that you can't use Xen and VMWare on the same box.  I 
could've ran Windows stuff in VMWare and Linux stuff paravirtualized in 
Xen. 


Russ
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Re: [Fwd: Re: [CentOS] School Server Setup]

[William L. Maltby]

On Wed, 2008-06-11 at 16:22 +0200, Ralph Angenendt wrote:
> Matt Hyclak wrote:
> > On Wed, Jun 11, 2008 at 04:07:48PM +0200, Ralph Angenendt enlightened us:
> > > This is something you don't have to back up with some arguments, as a
> > > non-green tree (at least from spring to fall) doesn't look that healthy
> > > and who has ever heard of a yellow fire engine?
> > 
> > Not to pick nits, but in Columbus, OH, USA the fire trucks are (or were) all
> > an awful shade of fluorescent yellow :-)
> 
> I now officially hate you, because you broke my brilliantly laid out
> retort.

Retort? I could've sworn it was a troll. ;-> The reply stating a
favorite was an opinion, possibly useful to the OP if he investigated.
As a suggestion, the poster had no obligation to offer supporting facts,
evidence, research, etc.

In this regard, it was no different than *many* other opinions on many
topics offered on the list that don't support a suggestion with rigorous
analytical processes. And as usual, the OP can request more info or
google.

And FYI, I've seen yellow and green fire trucks somewhere in the several
places I've lived. And trees that are red (redwoods in northern
California).

> 
> Ralph
> 

-- 
Bill

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[CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[henry ritzlmayr]

Am Mittwoch, den 11.06.2008, 10:06 -0700 schrieb MHR:
> On Wed, Jun 11, 2008 at 8:36 AM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
> >
> > I guess it has something to do with the ballooning driver for Dom0.  It
> > looks like I just tried to allocation too much memory to DomU and the box
> > went down hard.  I think there's a setting in xen to the min amount of
> > memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM.  Is
> > there a mini installation of CentOS that I can do that would use less RAM?
> >  I've already unchecked all the boxes when installing CentOS. I would like
> > Dom0 to be as small as possible, both due to RAM usage and from a security
> > perspective.
> 
> I've not familiarized myself with xen yet, but have you considered
> VMware Server?  I haven't had any serious problems with it, and none
> at all since v1.0.5 came out (1.0.6 is the current one).  Works
> nicely, stays within its memory allocation, and top et al work as
> you'd expect them to.
> 
> HTH
> 
> mhr

I evaluated VMware Server myself (v1.0.3) and at that time, Disk I/O was
pretty bad within a virtual machine. The only solution I found was XEN
with paravirtualization. Has there been any progress on that with later
releases?  

For example: 

dd if=/dev/md5 of=/dev/null bs=1M count=1000 on bare metal gave 272 MB/s
same within VMware gave only 47,9 MB/s

I know that dd is not a benchmark - but for measuring sequential reads
within a system its fair enough for me.

Henry


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Re: [CentOS] OT - host/asset tracking

[Max Hetrick]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Les Mikesell wrote:

> 
> Someone else mentioned ocsinventory-ng
> (http://www.ocsinventory-ng.org/), but to complete the picture,
> ocsinventory-ng includes agents for windows and linux that will
> automatically send each machine's hardware and software inventory to the
> server periodically and can be used to deploy packages so it is easier
> and more accurate than doing it by hand and will stay up to date.  GLPI
> is a more completed and detailed inventory system that can handle more
> than PCs, but it knows how to pull the data from ocsinventory when you
> use both.


Thanks, Les. I totally forgot that you could integrate ocsinventory into
GLPI. I've not used that portion, but I may pursue that in the near
future since you just reminded me! :)

Regards,
Max


- --
# find . "*imbecile" -exec sed -ie "s/stupidity/commonsense/g" '{}' \;
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.5 (GNU/Linux)

iD8DBQFIUAzvIXSX/6LmsXkRAnr8AJ4oJM+UCtxzTJUxoKJaOEx7w8Z6NQCbBSdM
o/gjZH8zxBScubxm8PyO9Dc=
=nzd7
-END PGP SIGNATURE-
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Re: [CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[Ruslan Sivak]

henry ritzlmayr wrote:

Am Mittwoch, den 11.06.2008, 10:06 -0700 schrieb MHR:
  

On Wed, Jun 11, 2008 at 8:36 AM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:


I guess it has something to do with the ballooning driver for Dom0.  It
looks like I just tried to allocation too much memory to DomU and the box
went down hard.  I think there's a setting in xen to the min amount of
memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM.  Is
there a mini installation of CentOS that I can do that would use less RAM?
 I've already unchecked all the boxes when installing CentOS. I would like
Dom0 to be as small as possible, both due to RAM usage and from a security
perspective.
  

I've not familiarized myself with xen yet, but have you considered
VMware Server?  I haven't had any serious problems with it, and none
at all since v1.0.5 came out (1.0.6 is the current one).  Works
nicely, stays within its memory allocation, and top et al work as
you'd expect them to.

HTH

mhr



I evaluated VMware Server myself (v1.0.3) and at that time, Disk I/O was
pretty bad within a virtual machine. The only solution I found was XEN
with paravirtualization. Has there been any progress on that with later
releases?  

For example: 


dd if=/dev/md5 of=/dev/null bs=1M count=1000 on bare metal gave 272 MB/s
same within VMware gave only 47,9 MB/s

I know that dd is not a benchmark - but for measuring sequential reads
within a system its fair enough for me.

Henry

  


This was another reason that I went with Xen, although my testing method 
at the time was flawed.  I've been using hdtune to measure windows 
performance, but it was giving me 70mb/s across the board.  I'm using 
IOmeter now and I will try to reinstall VMWare to see what the 
performance difference is.


Russ


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Re: [CentOS] Re: raid1 disk format?

[Les Mikesell]

Ross S. W. Walker wrote:


If you have a disk with several partitions set up as members of a 
raid1 md devices, can you make a dd image of that disk to replace its 
matching drive with identical partitions or are there differences 
between the mirrored partitions?

you can 'dd' the MBR and then re-add the partitions to the raid for
resyncing with 'mdadm'.

# dd if=/dev/sda of=/dev/sdb bs=512 count=1
# mdadm /dev/md0 --add /dev/sdb1
# mdadm /dev/md1 --add /dev/sdb2

If you want to really make sure you got everything you could dd the
whole first track with:

# dd if=/dev/sda of=/dev/sdb bs=512 count=63

-Ross


Or sfdisk -d /dev/sdX | sfdisk /dev/sdY
where x is source and y is the target.
This will work across drives that have slight geometry differences.
What I was hoping to do was to take the grub setup, the partitioning 
info and the contents in one shot and have the disks pair automatically 
when booted.  They didn't - but I think the other parts worked.


Now, is there a way to change the uuid on a running raid1 set?  I'd 
prefer that if the split and re-paired disks ever find their way back to 
the same machine that they not sync again.


'mdadm' writes a listing of the devices in the array to the md
superblock and orders them by number,major,minor. You cannot add
another device to the array with the same tuple.


Isn't this updated at detect time so the device minor's should always be 
different?



If you dd the first sector of the drive though you will duplicate
the partition table and grub boot loader to the other drive. Then
md-device-mapper will take care of copying the data over.


I'm curious as to why 2 complete dd'd copies don't pair at boot.  One 
comes up running and it does work to mdadm --add the partner partitions 
and after the resync they do automatically pair at boot.


--
  Les Mikesell
   [EMAIL PROTECTED]

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RE: [Fwd: Re: [CentOS] School Server Setup]

[Sorin Srbu]

I realise linux distros are rather a "religious" matter where each 
individual/user/sysadmin/whatever think that "their" particular distro is the 
best. 8-)

With that said, in my case, chosing CentOS was actually a no-brainer, as our 
department had already settled with RHEL3/4 for application reasons years ago. 
Furthermore, since CentOS is a binary compatible with RHEL, and looks and feel 
the same (minus the RHEL-logos), it's also easy to test things out with a free 
OS first.

I however really started out with Fedora Core for a short while, but was 
flustered with the fast update-schedule. Anyway, I don't even know or remember 
how I found out about CentOS, only that I felt this strange rush, much like 
when 
you put a nice well-worn-in suit or something and it doesn't chafe anywhere. I 
never bothered looking for another distro after finding CentOS.

I even installed it for the beloved mother after I found a potential rootkit on 
her WinXP Home Ed-machine. I had had it at that point... After installing 
CentOS5 for her, I applied the Redmond theme and let her play around for a bit 
with it. Worked like a charm. The hd died on her machine a few months back so I 
reinstalled it for her again, this time w/o the Redmond theme, and it still 
works like a charm for her.

>From a user-perspective, if a 50ish-year-old woman with no interest in OS:es 
>(or 
anything IT for that matter) can use CentOS without a hitch, then neither 
should 
anybody else. It just works, which I rather like, to put it mildly... If there 
ever was a linux-success story, this is the one.

[advocate mode]If you like CentOS, please buy a RHEL entitlement whenever 
possible. Remember, if there is no RHEL, there won't be a CentOS either, and 
CentOS is too good to loose.[/advocate mode]

That's my 3 oere. 8-)


-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of 
MHR
Sent: Wednesday, June 11, 2008 7:02 PM
To: CentOS mailing list
Subject: Re: [Fwd: Re: [CentOS] School Server Setup]

On Wed, Jun 11, 2008 at 7:11 AM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Alain Terriault <> scribbled on Wednesday, June 11, 2008 3:55 PM:
>
> How do you mean "big sophisticated setup"?
>
> I think CentOS is rather easy to setup, in fact CentOS was the OS of choice 
> when I first started with linux. I'm not fishing for flaming or trolling, 
> just 
> curious on why you think like you do. 8-)
>
>

'ear, 'ear!

I dabbled in Linux for nine years, including a six month
semi-concerted effort to use SuSE/Novell Linux (for which I paid $40),
none of which did it for me.  CentOS, in one month, impressed me
enough to spend almost $400 to upgrade my primary home desktop
hardware so I could install CentOS and run a Windows VMWare guest on
it, and I've never been more delighted with a small system with huge
capabilities.  It was (and is) easy to install and easy to manage, and
the only real trouble I've had with the system has come from other,
non-CentOS related areas (including all the things that I thought were
CentOS problems...).

Them's my $0.03 (inflation, y'know...).

mhr
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RE: [Fwd: Re: [CentOS] School Server Setup]

[Sorin Srbu]

Everything was orangy, yellow or weird green in the 70s... ;-)


-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of John R Pierce
Sent: Wednesday, June 11, 2008 7:11 PM
To: CentOS mailing list
Subject: Re: [Fwd: Re: [CentOS] School Server Setup]

MHR wrote:
> Well, actually, there was an experiment out here in the wild woolly
> west of California where, for a year or so, new (?) fire engines were,
> in fact, painted yellow.  It was a kind of dull yellow, not as bright
> as a school bus, but my family always used to joke about the school
> buses with sirens.  I haven't seen any in a while, although there are
> some white ones, too.
>   

they were incredibly bright electric yellow-green around here for 
awhile... I remember CDF trucks painted that color in the 70s, anyways.



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Re: [CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[Victor Padro]

On Wed, Jun 11, 2008 at 12:31 PM, henry ritzlmayr <[EMAIL PROTECTED]> wrote:

> Am Mittwoch, den 11.06.2008, 10:06 -0700 schrieb MHR:
> > On Wed, Jun 11, 2008 at 8:36 AM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
> > >
> > > I guess it has something to do with the ballooning driver for Dom0.  It
> > > looks like I just tried to allocation too much memory to DomU and the
> box
> > > went down hard.  I think there's a setting in xen to the min amount of
> > > memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM.
>  Is
> > > there a mini installation of CentOS that I can do that would use less
> RAM?
> > >  I've already unchecked all the boxes when installing CentOS. I would
> like
> > > Dom0 to be as small as possible, both due to RAM usage and from a
> security
> > > perspective.
> >
> > I've not familiarized myself with xen yet, but have you considered
> > VMware Server?  I haven't had any serious problems with it, and none
> > at all since v1.0.5 came out (1.0.6 is the current one).  Works
> > nicely, stays within its memory allocation, and top et al work as
> > you'd expect them to.
> >
> > HTH
> >
> > mhr
>
> I evaluated VMware Server myself (v1.0.3) and at that time, Disk I/O was
> pretty bad within a virtual machine. The only solution I found was XEN
> with paravirtualization. Has there been any progress on that with later
> releases?
>
> For example:
>
> dd if=/dev/md5 of=/dev/null bs=1M count=1000 on bare metal gave 272 MB/s
> same within VMware gave only 47,9 MB/s
>
> I know that dd is not a benchmark - but for measuring sequential reads
> within a system its fair enough for me.
>
> Henry
>
>
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>

Does anyone has tested Openvz?
I see many hosting providers using Openvz with CentOS, but haven't had the
time to tried out yet, I know it's not paravirtualization but maybe someone
has been able to use it sucessfully?
I have the same issue with RHEL 5.2, just showing 4Gigs of my 6Gigs box.

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RE: [Fwd: Re: [CentOS] School Server Setup]

[Ross S. W. Walker]

Sorin Srbu wrote:

> 
> Everything was orangy, yellow or weird green in the 70s... ;-)
> 

God, and that included my kitchen floor!

-Ross

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Re: [CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[MHR]

On Wed, Jun 11, 2008 at 10:31 AM, henry ritzlmayr <[EMAIL PROTECTED]> wrote:
>
> I evaluated VMware Server myself (v1.0.3) and at that time, Disk I/O was
> pretty bad within a virtual machine. The only solution I found was XEN
> with paravirtualization. Has there been any progress on that with later
> releases?

I couldn't say - I mainly use VMWare so I can run the two or three
Window$ applications I can't get (or can't find for a good price) on
Linux.  Performance is not really an issue, and most of the disk
access I do is via samba to my host disks.  I avoid using the virtual
disks as much as possible.

HTH.

mhr
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[CentOS] Re: raid1 disk format?

[Scott Silva]

on 6-11-2008 10:41 AM Les Mikesell spake the following:

Ross S. W. Walker wrote:


If you have a disk with several partitions set up as members of a 
raid1 md devices, can you make a dd image of that disk to replace 
its matching drive with identical partitions or are there 
differences between the mirrored partitions?

you can 'dd' the MBR and then re-add the partitions to the raid for
resyncing with 'mdadm'.

# dd if=/dev/sda of=/dev/sdb bs=512 count=1
# mdadm /dev/md0 --add /dev/sdb1
# mdadm /dev/md1 --add /dev/sdb2

If you want to really make sure you got everything you could dd the
whole first track with:

# dd if=/dev/sda of=/dev/sdb bs=512 count=63

-Ross


Or sfdisk -d /dev/sdX | sfdisk /dev/sdY
where x is source and y is the target.
This will work across drives that have slight geometry differences.
What I was hoping to do was to take the grub setup, the partitioning 
info and the contents in one shot and have the disks pair 
automatically when booted.  They didn't - but I think the other parts 
worked.


Now, is there a way to change the uuid on a running raid1 set?  I'd 
prefer that if the split and re-paired disks ever find their way back 
to the same machine that they not sync again.


'mdadm' writes a listing of the devices in the array to the md
superblock and orders them by number,major,minor. You cannot add
another device to the array with the same tuple.


Isn't this updated at detect time so the device minor's should always be 
different?



If you dd the first sector of the drive though you will duplicate
the partition table and grub boot loader to the other drive. Then
md-device-mapper will take care of copying the data over.


I'm curious as to why 2 complete dd'd copies don't pair at boot.  One 
comes up running and it does work to mdadm --add the partner partitions 
and after the resync they do automatically pair at boot.


Are they dd copies of the different nodes (IE.. dd copy of sda paired with dd 
copy of sdb)?



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Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64

[MHR]

On Wed, Jun 11, 2008 at 10:29 AM, Ruslan Sivak <[EMAIL PROTECTED]> wrote:
>
> Are you talking about VMware Server 1?

Yes.

> Isn't there an issue with only being
> able to allocate 3.4GB of ram or something to that point?  I guess it
> wouldn't be an issue since I only have 8GB of ram on this box, unless I
> wanted to allocate a lot of ram to a single process.

Yes, VMS1 only supports up to 3.6GB or memory.

> I, too, like VMWare Server 1 and have been using it in production under
> windows.  Does it support paravirtualization at all?

Not according to VMWare - that's up for v2, whenever that comes out.

mhr
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Re: [Fwd: Re: [CentOS] School Server Setup]

[MHR]

On Wed, Jun 11, 2008 at 10:55 AM, Ross S. W. Walker
<[EMAIL PROTECTED]> wrote:
> Sorin Srbu wrote:
>>
>> Everything was orangy, yellow or weird green in the 70s... ;-)
>
> God, and that included my kitchen floor!
>

Okay, where did you get those AWESOME drugs?  I want some

mhr
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[CentOS] Re: [Fwd: Re: School Server Setup]

[Scott Silva]

on 6-11-2008 10:45 AM Sorin Srbu spake the following:

Everything was orangy, yellow or weird green in the 70s... ;-)


I think you took some of the bad acid!  ;-P



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Re: [CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[nate]

MHR wrote:
> On Wed, Jun 11, 2008 at 10:31 AM, henry ritzlmayr <[EMAIL PROTECTED]> wrote:
>>
>> I evaluated VMware Server myself (v1.0.3) and at that time, Disk I/O was
>> pretty bad within a virtual machine. The only solution I found was XEN
>> with paravirtualization. Has there been any progress on that with later
>> releases?
>
> I couldn't say - I mainly use VMWare so I can run the two or three
> Window$ applications I can't get (or can't find for a good price) on
> Linux.  Performance is not really an issue, and most of the disk
> access I do is via samba to my host disks.  I avoid using the virtual
> disks as much as possible.

I came across this a couple days ago

http://blogs.vmware.com/performance/

May 22, 2008
100,000 I/O Operations Per Second, One ESX Host

Maxing out 500 15k RPM spindles with a single host. I didn't think
that was even possible. Granted this is ESX and not VMware server
(previously known as GSX), but ESX is pretty cheap these days,
the foundation version gets you a ton of stuff minus hot migrations
for $999(per 2 proc) (used to be about $3750). I think the
enterprise edition (~$5k per 2 proc) is overkill for most uses.

nate

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Re: [Fwd: Re: [CentOS] School Server Setup]

[Toby Bluhm]

Sorin Srbu wrote:

Everything was orangy, yellow or weird green in the 70s... ;-)

  


Throw in a little brown and you've described a tie-dyed shirt I wore in 
high school.


Just the other day my wife and I were looking at our old neighborhood 
with google street view. Unfortunately, some places have really gone 
downhill since then.



--
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Alltech Medical Systems America, Inc.
30825 Aurora Road Suite 100
Solon Ohio 44139
440-424-2240 ext203


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Re: [CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[MHR]

On Wed, Jun 11, 2008 at 11:20 AM, nate <[EMAIL PROTECTED]> wrote:
>
> I came across this a couple days ago
>
> http://blogs.vmware.com/performance/
>
> May 22, 2008
> 100,000 I/O Operations Per Second, One ESX Host
>
> Maxing out 500 15k RPM spindles with a single host. I didn't think
> that was even possible. Granted this is ESX and not VMware server
> (previously known as GSX), but ESX is pretty cheap these days,
> the foundation version gets you a ton of stuff minus hot migrations
> for $999(per 2 proc) (used to be about $3750). I think the
> enterprise edition (~$5k per 2 proc) is overkill for most uses.
>

On the day that I can look at a $1000 piece of software and think of
it as pretty cheap, I will give that $1000 (or more) instead to the
CentOS project.

mhr
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Re: [CentOS] Re: Re: Not seeing all memory in CentOS 5.1 x86_64

[Ruslan Sivak]

nate wrote:

MHR wrote:
  

On Wed, Jun 11, 2008 at 10:31 AM, henry ritzlmayr <[EMAIL PROTECTED]> wrote:


I evaluated VMware Server myself (v1.0.3) and at that time, Disk I/O was
pretty bad within a virtual machine. The only solution I found was XEN
with paravirtualization. Has there been any progress on that with later
releases?
  

I couldn't say - I mainly use VMWare so I can run the two or three
Window$ applications I can't get (or can't find for a good price) on
Linux.  Performance is not really an issue, and most of the disk
access I do is via samba to my host disks.  I avoid using the virtual
disks as much as possible.



I came across this a couple days ago

http://blogs.vmware.com/performance/

May 22, 2008
100,000 I/O Operations Per Second, One ESX Host

Maxing out 500 15k RPM spindles with a single host. I didn't think
that was even possible. Granted this is ESX and not VMware server
(previously known as GSX), but ESX is pretty cheap these days,
the foundation version gets you a ton of stuff minus hot migrations
for $999(per 2 proc) (used to be about $3750). I think the
enterprise edition (~$5k per 2 proc) is overkill for most uses.

nate

___
  


If I was going to pay for something, I would probably get XenServer.  I 
really liked the management utility, and I think the performance was OK, 
I might need to test the performance again.  It's also only $1k or so 
for the standard edition (and have a free express edition, which only 
supports 4GB of ram). 


Russ
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[CentOS] Centos 5.2 and Xen

[centos]

Hi,

1. I am NOT asking when it will be out. It will be when it's ready, very
soon.
2. Is there a good tutorial on how to use Xen with Windows? I have googled
and have not found some nice clear such as step 1,2,3... and why use this
configuration.

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When the network has to work
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RE: [CentOS] Re: raid1 disk format?

[Ross S. W. Walker]

Les Mikesell wrote:



> > 'mdadm' writes a listing of the devices in the array to the md
> > superblock and orders them by number,major,minor. You cannot add
> > another device to the array with the same tuple.
> 
> Isn't this updated at detect time so the device minor's 
> should always be 
> different?
> 
> > If you dd the first sector of the drive though you will duplicate
> > the partition table and grub boot loader to the other drive. Then
> > md-device-mapper will take care of copying the data over.
> 
> I'm curious as to why 2 complete dd'd copies don't pair at boot.  One 
> comes up running and it does work to mdadm --add the partner partitions 
> and after the resync they do automatically pair at boot.

Gosh darn it Les your just too damn inquisitive!

Well for the sake of the truth, the whole truth, and you know the rest.

Let me dig around here, hmmm, ok, not here, ok here we go:

/usr/src/kernels/2.6.18-53.1.21.el5-x86_64/include/linux/raid/md_p.h

Ok, looking at the comments, it seems...

/*
 * RAID superblock.
 *
 * The RAID superblock maintains some statistics on each RAID configuration.
 * Each real device in the RAID set contains it near the end of the device.
 * Some of the ideas are copied from the ext2fs implementation.
 *
 * We currently use 4096 bytes as follows:
 *
 *  word offset function
 *
 * 0  -31   Constant generic RAID device information.
 *32  -63   Generic state information.
 *64  -   127   Personality specific information.
 *   128  -   511   12 32-words descriptors of the disks in the raid set.
 *   512  -   911   Reserved.
 *   912  -  1023   Disk specific descriptor.
 */

The last part of the superblock contains a disk specific descriptor,
identifier (whatever), and the middle contains a list of all the
disk descriptors participating in the RAID set. (there can only be
12 disks max in a raid set? that's news to me, maybe the comment
is old, if you combine the reserved area you can get 24 disks).

>From this we can observe that when the disks are identified as
auto-raid and their superblocks are read it tells them what RAID
they belong to and their order in the array.

What happens if a duplicate descriptor is encountered? And how
does it determine which disk is the "official" disk?

I have yet to find those answers, but let me hypothesis that it
ejects either a) the disk with the oldest timestamp, or b) the
disk with the odd checksum out of the array.

To find out the real truth will need some detailed MD RAID docs
which I am having trouble finding or the sources which I cannot
be bothered/don't have time to download and audit right now.

-Ross

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Re: [CentOS] Centos 5.2 and Xen

[Tim Verhoeven]

On Wed, Jun 11, 2008 at 8:39 PM,  <[EMAIL PROTECTED]> wrote:
> Hi,
>
> 1. I am NOT asking when it will be out. It will be when it's ready, very
> soon.

Yep, completly correct :-)

> 2. Is there a good tutorial on how to use Xen with Windows? I have googled
> and have not found some nice clear such as step 1,2,3... and why use this
> configuration.

It is actually pretty simple. Only hardware requirement, your CPU
needs to support the hadware virtualization extensions (recent Intel
and AMD cpu's have that). If you have that you start the
virtualization manager point it to a .iso image of a Windows install
CD and you are ready. The rest works the same as virtualizing Linux.

Regards,
Tim

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[CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Brett Serkez]

All,

After many hours of research I have found there is a incompatibility
between OpenLDAP V2.3.x and V2.2.x, or atleast between V2.3.27 the
current version on CentOS V5 and V2.2.13 the current version on CentOS
V4.

The syncrepl feature of OpenLDAP, to keep multiple slapd servers
sync'd, was working between CentOS 4 and 5 at one time, as that is how
I populated the "slave" servers.

I've found references indicating protocol changes and
incompatibilities between these versions and indeed looking at
detailed debugging logs I can see the protocol falling apart between
the two versions.

Has anyone else seen this issue?  Is anyone aware of a fix in the
pipeline or a work around?

Thanks in advance,

Brett
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RE: [CentOS] Centos 5.2 and Xen

[Robert - elists]

> 
> It is actually pretty simple. Only hardware requirement, your CPU
> needs to support the hadware virtualization extensions (recent Intel
> and AMD cpu's have that). If you have that you start the
> virtualization manager point it to a .iso image of a Windows install
> CD and you are ready. The rest works the same as virtualizing Linux.
> 
> Regards,
> Tim

Tim

When you talk about recent processors in the Intel or AMD realm, do you, or
does anyone else on this list, have practical experience with the
virtualization extentions on HP or Dell or other Quad Xeon or Multi-CPU AMD
boxes ?

I don't know exactly what to ask in terms of best bang for the buck for
processor(s) speed or memory installed, yet I would be interested in hearing
what others are using and how well you are enjoying virtualization on the
boxes

Using XEN or Vmware or Both?

Thanks!

 - rh

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Re: [CentOS] Centos 5.2 and Xen

[Tim Verhoeven]

On Wed, Jun 11, 2008 at 9:05 PM, Robert - elists <[EMAIL PROTECTED]> wrote:
>
> When you talk about recent processors in the Intel or AMD realm, do you, or
> does anyone else on this list, have practical experience with the
> virtualization extentions on HP or Dell or other Quad Xeon or Multi-CPU AMD
> boxes ?
>
> I don't know exactly what to ask in terms of best bang for the buck for
> processor(s) speed or memory installed, yet I would be interested in hearing
> what others are using and how well you are enjoying virtualization on the
> boxes
>
> Using XEN or Vmware or Both?

My experience is with dual and quad core Intle CPU's and I don't have
any issues with them since CentOS 5.1. I'm only using Xen and it's
been fine for me.

Regards,
Tim

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RE: [CentOS] Re: [Fwd: Re: School Server Setup]

[Sorin Srbu]

Nah, I'm not that old (I'm the so-called Generation X, born in '72), but I 
remember how the wallpapers looked, as well as the clothes... X-}


-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of 
Scott Silva
Sent: Wednesday, June 11, 2008 8:07 PM
To: centos@centos.org
Subject: [CentOS] Re: [Fwd: Re: School Server Setup]

on 6-11-2008 10:45 AM Sorin Srbu spake the following:
> Everything was orangy, yellow or weird green in the 70s... ;-)
>
I think you took some of the bad acid!  ;-P



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RE: [Fwd: Re: [CentOS] School Server Setup]

[Sorin Srbu]

Geez, what did I start with my comment... ;-) FWIW (and if the moderator 
doesn't 
mind) I'd like to add I'm from Sweden. I think the 70s were little different 
here than in the US of A, mostly in the sense that everything was supposed to 
be 
mellow and brownish, when it wasn't orange or green and all was about not 
offending anybody else or something. Personally I wanted to play war with my 
friends but the teachers objected and started haranguing(?) about Vietnam, 
solidarity and what not. Like we cared...

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of 
Toby Bluhm
Sent: Wednesday, June 11, 2008 8:24 PM
To: CentOS mailing list
Subject: Re: [Fwd: Re: [CentOS] School Server Setup]

Sorin Srbu wrote:
> Everything was orangy, yellow or weird green in the 70s... ;-)
>
>

Throw in a little brown and you've described a tie-dyed shirt I wore in
high school.

Just the other day my wife and I were looking at our old neighborhood
with google street view. Unfortunately, some places have really gone
downhill since then.


-- 
Toby Bluhm
Alltech Medical Systems America, Inc.
30825 Aurora Road Suite 100
Solon Ohio 44139
440-424-2240 ext203


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Re: [CentOS] Centos 5.2 and Xen

[Ruslan Sivak]

Robert - elists wrote:


Tim

When you talk about recent processors in the Intel or AMD realm, do you, or
does anyone else on this list, have practical experience with the
virtualization extentions on HP or Dell or other Quad Xeon or Multi-CPU AMD
boxes ?

I don't know exactly what to ask in terms of best bang for the buck for
processor(s) speed or memory installed, yet I would be interested in hearing
what others are using and how well you are enjoying virtualization on the
boxes

Using XEN or Vmware or Both?

Thanks!

 - rh

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With Dell, your best bang for the buck will probably be Inspiron 
530/Vostro 400 with the Q6600 2.4Ghz Quad Core CPU.  With the latest 
BIOS these support up to 8GB of RAM.  (Of course get the ram elsewhere, 
not from Dell). 


Russ
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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[nate]

Brett Serkez wrote:

> Has anyone else seen this issue?  Is anyone aware of a fix in the
> pipeline or a work around?

Compile the source rpm from centos 5.x on a 4.x system and upgrade the
4.x systems to it ? (short of upgrading the entire OS to 5.x if you
don't want to do that it can be a major change depending on your
environment)

nate

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Re: [CentOS] Centos 5.2 and Xen

[nate]

Tim Verhoeven wrote:

> It is actually pretty simple. Only hardware requirement, your CPU
> needs to support the hadware virtualization extensions (recent Intel
> and AMD cpu's have that). If you have that you start the
> virtualization manager point it to a .iso image of a Windows install
> CD and you are ready. The rest works the same as virtualizing Linux.

You should be able to use the vmware cpu check tool as an easy check
to determine if your CPU has those instructions or not. (sometimes
looking up cpu info to match it with specific features can be a pain)

http://www.vmware.com/download/ws/drivers_tools.html

It says it's for 64-bit compatibility but the same instructions are
needed at least for VMWare.

nate

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[CentOS] Re: Doubt about Ubuntu Server

[Scott Silva]

on 6-11-2008 2:46 PM Masters IT Gmail spake the following:

Sorry if I offend someone by sending this mail that is not related to
Centos, but I am installing Ubuntu in a VM (Vmware) and after I installed
Ubuntu when is booting it freezes and I can write commands but I don't know
what to do to view what is happening, if you can help me, it is welcome, I
am using Ubuntu because I am following a tutorial to get a CRM open source
to work, thanks in advance.

George from Uruguay.


Why, Oh why would you ask this here?
Maybe you could get Microsoft support to help you!  ;-P

Trolling, and thread hijacking.

Next you will answer this by top-posting

--
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't



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Re: [Fwd: Re: [CentOS] School Server Setup]

[Ralph Angenendt]

William L. Maltby wrote:
> On Wed, 2008-06-11 at 16:22 +0200, Ralph Angenendt wrote:
> > I now officially hate you, because you broke my brilliantly laid out
> > retort.
> 
> Retort? I could've sworn it was a troll. ;-> 

Na, no troll. 

> The reply stating a favorite was an opinion, possibly useful to the OP
> if he investigated.  As a suggestion, the poster had no obligation to
> offer supporting facts, evidence, research, etc.

Sorry, there is one thing I really don't like: Giving out advice without
telling why. Because it is really useless for the guy who got that
advice. Why should he follow down that path? Why was he given that
advice? Is there really a reason to put some research time into that
advice?

> In this regard, it was no different than *many* other opinions on many
> topics offered on the list that don't support a suggestion with rigorous
> analytical processes. And as usual, the OP can request more info or
> google.

Yes. Opinions. Opinions are good, but should be backed up - and not only
when you're queried why you have that opinion.

> And FYI, I've seen yellow and green fire trucks somewhere in the several
> places I've lived. And trees that are red (redwoods in northern
> California).

Good thing  I live in Europe :)

Cheers,

Ralph


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Re: [Fwd: Re: [CentOS] School Server Setup]

[Ralph Angenendt]

Alain Terriault, Mr. wrote:

Okay, I can see where you are getting with Clarkconnect and SME. That
really might be easier for people who aren't into administrating
servers.

> - Workstations, Fedora or Ubuntu .. because I like having the most
> up2date versions and goodies on my desktop for free. 

But this contradicts what you said above. If you want hasslefree
administration for the one or two servers, you don't want to lose that
on a desktop which you have to update at least once a year and where
updates can give you headaches because something major changed.

Giving out stable Desktops is one of the things where CentOS really
shines. And: These Desktops are for research and work, not for having
the latest and greatest software. 

Ralph


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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Ralph Angenendt]

nate wrote:
> Brett Serkez wrote:
> 
> > Has anyone else seen this issue?  Is anyone aware of a fix in the
> > pipeline or a work around?
> 
> Compile the source rpm from centos 5.x on a 4.x system and upgrade the
> 4.x systems to it ? (short of upgrading the entire OS to 5.x if you
> don't want to do that it can be a major change depending on your
> environment)

I tried to do that, as I wanted to have LDAP overlays (hey, anyone who
wants to test those on CentOS 5 - there are packages in the testing
repository).

And I found out that you don't want to do that. There are too many
packages which are built against openldap, you'd end up rebuilding a
rather large part of the distribution. 

Ralph


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Re: [CentOS] Centos 5.2 and Xen

[Ned Slider]

Robert - elists wrote:


Using XEN or Vmware or Both?

Thanks!

 - rh


I've run VMware Server (free, as in cost, not as in open source) on 
CentOS to host WinXP VMs since it was in beta and have no complaints. 
There is an RPM package available on VMware's site:


$ rpm -q VMware-server
VMware-server-1.0.6-91891.i386

It's only available in i386 package but installs fine on x86_64 and 
supports 64-bit VMs provided the underlying hardware supports it. I 
believe VMs are limited to a max of 2 processors each.


I've used VMware Server on systems varying from old AthlonXP, 512MB RAM 
through to Intel Quad Core Q6600 with 4GB RAM. Note VMware will run on 
older processors without hardware virtualization. In my experience 
there's little noticeable difference between software and hardware 
virtualization (on VMware), and each run at about the perceived speed 
you would expect if it was on native hardware (I've not conducted any 
benchmark tests). The main consideration is that you have enough RAM to 
support the host OS (CentOS) and any VM(s) running on it.


I've not used Xen so can't offer a comparison.

Ned

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Re: [CentOS] Doubt about Ubuntu Server

[Lanny Marcus]

On 6/11/08, Masters IT Gmail <[EMAIL PROTECTED]> wrote:
> Sorry if I offend someone by sending this mail that is not related to
> Centos, but I am installing Ubuntu in a VM (Vmware) and after I installed
> Ubuntu when is booting it freezes and I can write commands but I don't know
> what to do to view what is happening, if you can help me, it is welcome, I
> am using Ubuntu because I am following a tutorial to get a CRM open source
> to work, thanks in advance.
> George from Uruguay.
>
Jorge: In my part of South America (Colombia) I believe that you
should have posted this in a VMWare Mailing List. It has nothing to do
with CentOS and is very off topic. Lanny
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Re: [CentOS] Centos 5.2 and Xen

[Lanny Marcus]

On 6/11/08, Ned Slider <[EMAIL PROTECTED]> wrote:

> I've run VMware Server (free, as in cost, not as in open source) on
> CentOS to host WinXP VMs since it was in beta and have no complaints.
> There is an RPM package available on VMware's site:
>
> $ rpm -q VMware-server
> VMware-server-1.0.6-91891.i386
>
> It's only available in i386 package but installs fine on x86_64 and
> supports 64-bit VMs provided the underlying hardware supports it. I
> believe VMs are limited to a max of 2 processors each.
>
> I've used VMware Server on systems varying from old AthlonXP, 512MB RAM
> through to Intel Quad Core Q6600 with 4GB RAM. Note VMware will run on
> older processors without hardware virtualization. In my experience
> there's little noticeable difference between software and hardware
> virtualization (on VMware), and each run at about the perceived speed
> you would expect if it was on native hardware (I've not conducted any
> benchmark tests). The main consideration is that you have enough RAM to
> support the host OS (CentOS) and any VM(s) running on it.
>
> I've not used Xen so can't offer a comparison.

Ned: I was very interested to read that you've run VMWare Server on
systems with only 512 MB of RAM.   I haven't tried it, because the box
I can use only has 512 MB of RAM.

My impression is that Xen is much more demanding about HW.  Lanny
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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Craig White]

On Thu, 2008-06-12 at 00:08 +0200, Ralph Angenendt wrote:
> nate wrote:
> > Brett Serkez wrote:
> > 
> > > Has anyone else seen this issue?  Is anyone aware of a fix in the
> > > pipeline or a work around?
> > 
> > Compile the source rpm from centos 5.x on a 4.x system and upgrade the
> > 4.x systems to it ? (short of upgrading the entire OS to 5.x if you
> > don't want to do that it can be a major change depending on your
> > environment)
> 
> I tried to do that, as I wanted to have LDAP overlays (hey, anyone who
> wants to test those on CentOS 5 - there are packages in the testing
> repository).
> 
> And I found out that you don't want to do that. There are too many
> packages which are built against openldap, you'd end up rebuilding a
> rather large part of the distribution. 

there are a number of people that do exactly that and in fact, if you go
on the openldap-software list, they will tell you that if you expect
openldap to function, that you need to build it from source (either
2.3.37 (or whatever the latest is in 2.3) or 2.4.9 (or whatever the
latest is).

IIRC, you have to build from source...
- openssl
- kerberos
- cyrus-sasl
- db4
- openldap

I built everything in /usr/local and just left the distribution packages
intact and it worked.

I believe that Buchan Milne offers rpm packages that can install on
CentOS-4 and certainly Symas/Connexitor has rpm packages that you can
install but it wasn't that hard to build it from source.

That said, I don't recall syncrepl ever working in 2.2.x and have used
slurpd for replicating with 2.2 but if the OP says he thinks he had it
running, well, I'm not gonna argue with him.

Craig

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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Ralph Angenendt]

Craig White wrote:
> On Thu, 2008-06-12 at 00:08 +0200, Ralph Angenendt wrote:
> > I tried to do that, as I wanted to have LDAP overlays (hey, anyone who
> > wants to test those on CentOS 5 - there are packages in the testing
> > repository).
> > 
> > And I found out that you don't want to do that. There are too many
> > packages which are built against openldap, you'd end up rebuilding a
> > rather large part of the distribution. 
> 
> IIRC, you have to build from source...
> - openssl
> - kerberos
> - cyrus-sasl
> - db4
> - openldap
> 
> I built everything in /usr/local and just left the distribution packages
> intact and it worked.

On my CentOS 5 install there are about 33 packages requiring a certain
version of libldap and liblber.

Ralph


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Re: [CentOS] Centos 5.2 and Xen

[Ned Slider]

Lanny Marcus wrote:



Ned: I was very interested to read that you've run VMWare Server on
systems with only 512 MB of RAM.   I haven't tried it, because the box
I can use only has 512 MB of RAM.



Yes, assuming you give 256MB to a single VM guest and allow the CentOS 
host 256MB, you'll get about the level of performance that you'd expect 
for systems with that little RAM. They will run, but they won't be 
lightning quick so you will need to think about running services 
carefully and minimize memory usage where you can to prevent swapping.


1GB split between the host and gust would probably be a better sensible 
minimum given the current price of RAM, and for a new dual or quad core 
system I wouldn't really consider installing less than 4 GB given the 
current pricing.



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Re: [CentOS] Centos 5.2 and Xen

[MHR]

On Wed, Jun 11, 2008 at 3:22 PM, Lanny Marcus <[EMAIL PROTECTED]> wrote:
>
> Ned: I was very interested to read that you've run VMWare Server on
> systems with only 512 MB of RAM.   I haven't tried it, because the box
> I can use only has 512 MB of RAM.
>
> My impression is that Xen is much more demanding about HW.  Lanny

I was told that for any kind of performance, at least 1G of memory per
VM plus 1G for the host was "a good idea."  that was why I originally
upgraded mine to 2G (well, that and I *really* wanted a better CPU,
and this was a great excuse).  That might have been for VMWare
Workstation (not free, but I had it at work) not VMWare Server (which
I use at home).

When I had 2G, I only allowed my VM WXP guest to use 768M, but I upped
that to 1G when I replaced my 2G with 4G.  I also have a CentOS 5.?
guest on the same box, but I've never actually tried running them both
at the same time.

HTH.

mhr
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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Craig White]

On Thu, 2008-06-12 at 00:36 +0200, Ralph Angenendt wrote:
> Craig White wrote:
> > On Thu, 2008-06-12 at 00:08 +0200, Ralph Angenendt wrote:
> > > I tried to do that, as I wanted to have LDAP overlays (hey, anyone who
> > > wants to test those on CentOS 5 - there are packages in the testing
> > > repository).
> > > 
> > > And I found out that you don't want to do that. There are too many
> > > packages which are built against openldap, you'd end up rebuilding a
> > > rather large part of the distribution. 
> > 
> > IIRC, you have to build from source...
> > - openssl
> > - kerberos
> > - cyrus-sasl
> > - db4
> > - openldap
> > 
> > I built everything in /usr/local and just left the distribution packages
> > intact and it worked.
> 
> On my CentOS 5 install there are about 33 packages requiring a certain
> version of libldap and liblber.

as I said, I just left the distribution packages intact and built
everything in /usr/local

Craig

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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Brett Serkez]

On Wed, Jun 11, 2008 at 6:24 PM, Craig White <[EMAIL PROTECTED]> wrote:
> That said, I don't recall syncrepl ever working in 2.2.x and have used
> slurpd for replicating with 2.2 but if the OP says he thinks he had it
> running, well, I'm not gonna argue with him.

syncrepl 2.2.x works fine between CentOS 4 systems as installed via
yum.  I just used this today, made changes on the master that I needed
on to use on the slave, the replication was instant.

The issue is between 2.2.x and 2.3.x.  What I said I thought worked
was replication from CentOS 4.x to CentOS 5.x (ie. 2.2.x -> 2.3.x), as
when I brought the CentOS 5.x on-line and started slapd,  the LDAP
database was almost instantly available.  I never used any other
method to load the LDAP data on the CentOS 5.x system from the CentOS
4.x master.

It is only recently that I noticed the replication failing, I believe
after a recent yum update.

I have looked at using yum to regress the version of LDAP on the
CentOS 5.x system, but it seems I needed to have turned on a yum
option before the update to do this.  I also noticed all the
dependencies as far as trying to build myself.

My assumption is that eventually newer versions of LDAP will be
available that will work.

Brett
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Re: [CentOS] Centos 5.2 and Xen

[russ]

If you only have 512mb of ram, there's almost no reason to virtualize. Windows 
needs a minimum of 128-512MB to run stable.  I highly suggest that you get more 
RAM - its very cheap these days.  

If you want to dedicate a box to virtualization, and won't be using more then 
4GB of ram for your virtual machines - I highly recommend xenserver express.  
Its free, but has much better performance then vmware.  

Looking at it more closely, it seems to be rhel5, or more likely centos5 under 
the hood, so you can probably use the host for other things too.

I wonder if it can be combined with other techologies - KVM, openVZ, etc to 
give more then 4GB of ram for virtualization?  I tried installing vmware, but 
it wouldn't run under.a xen kernel.  

RuSs
Sent from my Verizon Wireless BlackBerry

-Original Message-
From: "Lanny Marcus" <[EMAIL PROTECTED]>

Date: Wed, 11 Jun 2008 17:22:12 
To:"CentOS mailing list" 
Subject: Re: [CentOS] Centos 5.2 and Xen


On 6/11/08, Ned Slider <[EMAIL PROTECTED]> wrote:

> I've run VMware Server (free, as in cost, not as in open source) on
> CentOS to host WinXP VMs since it was in beta and have no complaints.
> There is an RPM package available on VMware's site:
>
> $ rpm -q VMware-server
> VMware-server-1.0.6-91891.i386
>
> It's only available in i386 package but installs fine on x86_64 and
> supports 64-bit VMs provided the underlying hardware supports it. I
> believe VMs are limited to a max of 2 processors each.
>
> I've used VMware Server on systems varying from old AthlonXP, 512MB RAM
> through to Intel Quad Core Q6600 with 4GB RAM. Note VMware will run on
> older processors without hardware virtualization. In my experience
> there's little noticeable difference between software and hardware
> virtualization (on VMware), and each run at about the perceived speed
> you would expect if it was on native hardware (I've not conducted any
> benchmark tests). The main consideration is that you have enough RAM to
> support the host OS (CentOS) and any VM(s) running on it.
>
> I've not used Xen so can't offer a comparison.

Ned: I was very interested to read that you've run VMWare Server on
systems with only 512 MB of RAM.   I haven't tried it, because the box
I can use only has 512 MB of RAM.

My impression is that Xen is much more demanding about HW.  Lanny
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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Craig White]

On Thu, 2008-06-12 at 00:36 +0200, Ralph Angenendt wrote:
> Craig White wrote:
> > On Thu, 2008-06-12 at 00:08 +0200, Ralph Angenendt wrote:
> > > I tried to do that, as I wanted to have LDAP overlays (hey, anyone who
> > > wants to test those on CentOS 5 - there are packages in the testing
> > > repository).
> > > 
> > > And I found out that you don't want to do that. There are too many
> > > packages which are built against openldap, you'd end up rebuilding a
> > > rather large part of the distribution. 
> > 
> > IIRC, you have to build from source...
> > - openssl
> > - kerberos
> > - cyrus-sasl
> > - db4
> > - openldap
> > 
> > I built everything in /usr/local and just left the distribution packages
> > intact and it worked.
> 
> On my CentOS 5 install there are about 33 packages requiring a certain
> version of libldap and liblber.

and I'll add one more thing...

I think these are Buchan Milne's rpm packages here for updated openldap
that you can drop in as replacements...

http://staff.telkomsa.net/packages/

but I've never used them myself

Craig

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[CentOS] Bind acl statement issue

[Joseph L. Casale]

>From the manual, localnets matches hosts belonging to a network for which the 
>server
has an interface in. I have a dns server in a dmz with an ip of 192.168.2.2 in 
/24. Named.conf
has 3 views, localhost_resolver -> localhost, internal -> localnets, and 
external -> !localnets; !localhost.

I have a management workstation in 192.168.0.0/24 that is connecting and 
receiving the following
debug:
client 192.168.0.44#2188: no matching view in class 'IN'

I don't get it? Obvioulsy if I add all to the external view, it works. How is 
the failing?

Thanks!
jlc
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Re: [CentOS] LDAP syncrepl incompatibility between CentOS 4.x and 5.x

[Johnny Hughes]

Brett Serkez wrote:

On Wed, Jun 11, 2008 at 6:24 PM, Craig White <[EMAIL PROTECTED]> wrote:

That said, I don't recall syncrepl ever working in 2.2.x and have used
slurpd for replicating with 2.2 but if the OP says he thinks he had it
running, well, I'm not gonna argue with him.


syncrepl 2.2.x works fine between CentOS 4 systems as installed via
yum.  I just used this today, made changes on the master that I needed
on to use on the slave, the replication was instant.

The issue is between 2.2.x and 2.3.x.  What I said I thought worked
was replication from CentOS 4.x to CentOS 5.x (ie. 2.2.x -> 2.3.x), as
when I brought the CentOS 5.x on-line and started slapd,  the LDAP
database was almost instantly available.  I never used any other
method to load the LDAP data on the CentOS 5.x system from the CentOS
4.x master.

It is only recently that I noticed the replication failing, I believe
after a recent yum update.

I have looked at using yum to regress the version of LDAP on the
CentOS 5.x system, but it seems I needed to have turned on a yum
option before the update to do this.  I also noticed all the
dependencies as far as trying to build myself.

My assumption is that eventually newer versions of LDAP will be
available that will work.


There is an openldap in the CentOS Testing repo for centos-4 that will 
work with centos-5.


It has a compat-openldap- for the things that are compiled 
against the c4 version ... and i am using it in production and syncing 
c5 and c4.


However, it is a couple updates behind.

The version is  openldap-2.3.27-4.el4.centos

Thanks,
Johnny Hughes



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Re: [CentOS] Centos 5.2 and Xen

[Luke S Crawford]

[EMAIL PROTECTED] writes:
> If you only have 512mb of ram, there's almost no reason to virtualize. 
> Windows needs a minimum of 128-512MB to run stable.  I highly suggest that 
> you get more RAM - its very cheap these days.  

seconded.  my standard server has 8G unbuffered ecc.  Newegg sells 
2x2Gb packs of unbuffered ECC kingston brand ddr2 for under $100.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820134312

No reason, really, to not fill your motherboard with ram.  

> If you want to dedicate a box to virtualization, and won't be using more then 
> 4GB of ram for your virtual machines - I highly recommend xenserver express.  
> Its free, but has much better performance then vmware.  

the free (closed) xensource product is good... I also wanted to point out 
the new gpl windows pv drivers:

http://wiki.xensource.com/xenwiki/XenWindowsGplPv/

you could use them with the standard open-source Xen, or even with the 
Xen support distributed with CentOS 5, and avoid the ram limits all together.
(well, there is a limit to the open-source xen, but it's ridiculous;  most
of us won't hit it for several years, at least.)  

still kinda beta, but something to watch.  


> I wonder if it can be combined with other technologies - KVM, openVZ, etc to 
> give more then 4GB of ram for virtualization?  I tried installing vmware, but 
> it wouldn't run under.a xen kernel.  

running vmware under a xenU guest wouldn't lift any ram limit imposed by the 
xen kernel or dom0.

the 4Gb limit is added to the free (closed source) citrix xen product
so that people have a reason to pay for the full version...  really,
if you need more than 4G, pay for full xensource, or use the open-source
Xen/open source pv drivers.


I do know some people that run linux vserver guests under a Linux Xen DomU-
that seemed to work ok.

and just for fun, I've run a Xen kernel/Dom0 under a Xen HVM DomU. 
Performance wasn't great;   I don't think I'd do it in production, but
it worked, and was a neat experiment.  
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