stand corrected. Thank you Gianluca for opening my eyes.
Zlatko Krastev
IT Consultant
Gianluca Mariani1 <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
24.10.2002 16:26
Please respond to "ADSM: Dist Stor Manager"
To: [EM
]
Subject: Re: RAID5 in TSM
Hi ,
I thank all for your suggestions.I removed the mirrors of db and log.There
is a great improvement in the performance.I am recommending the customer to
have non RAID disks for db and log.Then i mirror the db and log.
Regards
Raghu.
"Seay,
Paul"
cc:
Sent by: Subject: Re: RAID5 in TSM
"ADSM: Dist
Stor Manager"
<[EMAIL PROTECTED]
RIST.EDU>
10/24/2002
: Gianluca Mariani1 [mailto:gianluca_mariani@;IT.IBM.COM]
Sent: Thursday, October 24, 2002 9:26 AM
To: [EMAIL PROTECTED]
Subject: Re: RAID5 in TSM
I would just like to add something. the manuals are sometimes misleading.
ESS runs at a "theoretical" speed of 1280 MB/s yes. that's becaus
ent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
> 23.10.2002 07:30
> Please respond to "ADSM: Dist Stor Manager"
>
>
> To: [EMAIL PROTECTED]
> cc:
> Subject:Re: RAID5 in TSM
>
>
> Paul,
>
>
> keeping TS
er for TSM.
Zlatko Krastev
IT Consultant
Raghu S <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
23.10.2002 07:30
Please respond to "ADSM: Dist Stor Manager"
To: [EMAIL PROTECTED]
cc:
Subject:Re: R
: (240)539-7175
-Original Message-
From: ADSM: Dist Stor Manager [mailto:ADSM-L@;VM.MARIST.EDU]On Behalf Of
Seay, Paul
Sent: Wednesday, October 23, 2002 4:10 PM
To: [EMAIL PROTECTED]
Subject: Re: RAID5 in TSM
It depends!
Not all RAID-5 is created equal. NT software RAID-5 is a dog and for
Inc.
757-688-8180
-Original Message-
From: Raghu S [mailto:raghu@;COSMOS.DCMDS.CO.IN]
Sent: Wednesday, October 23, 2002 12:31 AM
To: [EMAIL PROTECTED]
Subject: Re: RAID5 in TSM
Paul,
keeping TSM database,log and disk storage pool on RAID5 degrades the
performance???
Regards
Raghu
Paul, you wouldn't happen to know off hand the APAR for the horrible
mirroring bug, would you?
tia
lisa
"Seay, Paul"
cc:
Sent by: Subject: Re: RAID5 in TSM
Raghu S wrote:
Hi,
There was a lot of discussion on this topic before.But i am requesting TSM
gurus give their comments again.
The set up is like this.
TSM Server : Windows NT 4.0 SP6, TSM 5.1.0.0
392 MB memory, P III
Adaptech Ultra SCSI
Your database is I/O-bound. You have, essentially, duplicated your
protection at different levels. You need to choose between 1) RAID-5 or
2) TSM Software mirroring, but you should not use both. Either one will
protect you from a disk drive failure, and either one will allow the
server to stay up a
AND.AC.NZ> cc:
> Sent by: "ADSM: Subject: Re: RAID5 in TSM
> Dist Stor
> Manager"
> <[EMAIL PROTECTED]
> .EDU>
>
>
&g
Paul,
keeping TSM database,log and disk storage pool on RAID5 degrades the
performance???
Regards
Raghu
"Seay, Paul"
cc:
Sent by: Subject: Re: RAID5 in TSM
&
Here i am not worried about the protection.I am worried about the
performace. Most of my client backups are failed.
Suad Musovich
cc:
Sent by: "ADSM: Subject: Re: RAID5 in TSM
Dist
I tested with compression and without compression.No much difference in
performance.
"Seay, Paul"
cc:
Sent by: Subject: Re: RAID5 in TSM
"ADSM: Dist
Message-
From: Matt Simpson [mailto:msimpson@;UKY.EDU]
Sent: Tuesday, October 22, 2002 1:52 PM
To: [EMAIL PROTECTED]
Subject: Re: RAID5 in TSM
At 9:27 AM -0400 10/22/02, Lawrence Clark said:
>Even though there may be a slight performance hit on writes, I've
>placed the TSM DB o
Realistically, if Array B dies, you lose the Database "and" recovery
log. The mirroring ain 't giving you protection from that.
I would separate the recovery log to array A and lose the mirroring on
both DB and log(maybe mirror log between arrays).
Restoration of a broken DB should only mean a coup
Are you running compression?
Paul D. Seay, Jr.
Technical Specialist
Naptheon Inc.
757-688-8180
-Original Message-
From: Raghu S [mailto:raghu@;COSMOS.DCMDS.CO.IN]
Sent: Tuesday, October 22, 2002 8:03 AM
To: [EMAIL PROTECTED]
Subject: RAID5 in TSM
Hi,
There was a lot of discussion on
At 9:27 AM -0400 10/22/02, Lawrence Clark said:
Even though there may be a slight performance hit on writes, I've placed
the TSM DB on RAID-5 to ensure availability and no down time in case of
a disk loss.
With RAID 5, is there any point in software mirroring (dual copies of
database)?
Our DB i
Even though there may be a slight performance hit on writes, I've placed
the TSM DB on RAID-5 to ensure availability and no down time in case of
a disk loss.
>>> [EMAIL PROTECTED] 10/22/02 08:03AM >>>
Hi,
There was a lot of discussion on this topic before.But i am requesting
TSM
gurus give their
Hi,
There was a lot of discussion on this topic before.But i am requesting TSM
gurus give their comments again.
The set up is like this.
TSM Server : Windows NT 4.0 SP6, TSM 5.1.0.0
392 MB memory, P III
Adaptech Ultra SCSI
Hard Dis
Hi,
There was a lot of discussion on this topic before.But i am requesting TSM
gurus give their comments again.
The set up is like this.
TSM Server : Windows NT 4.0 SP6, TSM 5.1.0.0
392 MB memory, P III
Adaptech Ultra SCSI
Hard Dis
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