On 7/21/2010 2:38 PM, Cindy Swearingen wrote:
The answer depends on your goals: space, performance, reliability
To me, optimal is best performance and reliability so use:
- JBOD
- ZFS mirrored pool of 22x2 + 2 spares
- Mirror the disk pairs across both controllers
Let ZFS protect your data.
C
Another data point - I used three 15K disks striped using my RAID controller as
a slog for the zil, and performance went down. I had three raidz sata vdevs
holding the data, and my load was VMs, i.e. a fair amount of small, random IO
(60% random, 50% write, ~16k in size).
Scott
--
This messag
On 7/21/2010 7:47 AM, Eugen Leitl wrote:
How badly would a dual-core 1.6 GHz Atom with 4 GBytes RAM
be underpowered for serving 4-6 SATA drives? What kind of
transfer speed (GBit Ethernet, Intel NICs) can I expect with
raidz2 or raidz3?
Thanks.
For light usage (I'm assuming you want to us
The answer depends on your goals: space, performance, reliability
To me, optimal is best performance and reliability so use:
- JBOD
- ZFS mirrored pool of 22x2 + 2 spares
- Mirror the disk pairs across both controllers
Let ZFS protect your data.
Cindy
On 07/21/10 15:10, John Andrunas wrote:
Andrej Podzimek wrote:
> 1) Btrfs does not have mature and user-friendly command-line
> tools. AFAIK, you can only list your snapshots and subvolumes by
> grep'ing the tree dump. ;-)
I haven't looked closely at the btrfs commands recently, but from what I've
seen, they're really amazingly
I know this is potentially a loaded question, but what is generally
considered the optimal disk configuration for ZFS. I have 48 disks on
2 RAID controllers (2x24). The RAID controller can do RAID
0/1/5/6/10/50/60 or JBOD. What is generally considered the optimal
configuration for the disks. JB
On Wed, Jul 21, 2010 at 1:38 PM, JavaWebDev wrote:
> 1. WD Caviar Black
>
> Can they be used with in raidz or mirrors?
We use the 500 GB versions attached to 3Ware controllers (configured
as Single Disk arrays). They work quite nicely.
> With the new models the firmwar
I wanted to build a small back up (maybe also NAS) server using
OpenSolaris and ZFS using consumer drives but after reading a number of
threads and blogs I'm totally confused and was hoping I could get some
questions answered since many people have been using consumer drives
with zfs.
When Z
It does seem to be faster now that I really installed the non-debug bits. I
let it resume
a scrub after reboot, and while it's not as fast as it usually is (280 - 300
MB/s vs 500+)
I assume it's just presently checking a part of the filesystem currently with
smaller
files thus reducing the spee
On Wed, 2010-07-21 at 09:42 -0700, Orvar Korvar wrote:
> Are there any drawbacks to partition a SSD in two parts and use L2ARC on one
> partition, and ZIL on the other? Any thoughts?
Its probably a reasonable approach. The ZIL can be fairly small... only
about 8 GB is probably sufficient for mo
Hi,
My bits were originally debug because I didn't know any better. I thought I
had then
recompiled without debug to test again, but I didn't realize until just now the
packages
end up in a different directory (nightly vs nightly-nd) so I believe after
compiling
non-debug I just reinstalled th
Are there any drawbacks to partition a SSD in two parts and use L2ARC on one
partition, and ZIL on the other? Any thoughts?
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Here is another very recent blog post from ConstantThinking:
http://constantin.glez.de/blog/2010/07/solaris-zfs-synchronous-writes-and-zil-explained
Very well done, a highly recommended read.
Christopher George
Founder/CTO
www.ddrdrive.com
--
This message posted from opensolaris.org
___
On Wed, 2010-07-21 at 02:21 -0400, Richard Lowe wrote:
> I built in the normal fashion, with the CBE compilers
> (cc: Sun C 5.9 SunOS_i386 Patch 124868-10 2009/04/30), and 12u1 lint.
>
> I'm not subscribed to zfs-discuss, but have you established whether the
> problematic build is DEBUG? (the bits
On Wed, 2010-07-21 at 17:12 +0200, Saso Kiselkov wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> If you plan on using it as a storage server for multimedia data
> (movies), don't even bother considering compression, as most media files
> already come heavily compressed. Dedup might st
I built in the normal fashion, with the CBE compilers
(cc: Sun C 5.9 SunOS_i386 Patch 124868-10 2009/04/30), and 12u1 lint.
I'm not subscribed to zfs-discuss, but have you established whether the
problematic build is DEBUG? (the bits I uploaded were non-DEBUG).
-- Rich
Haudy Kazemi wrote:
>>> C
On Tue, Jul 20, 2010 at 1:40 PM, Ulrich Graef wrote:
> When you are writing to a file and currently dedup is enabled, then the
> Data is entered into the dedup table of the pool.
> (There is one dedup table per pool not per zfs).
>
> Switching off the dedup does not change this data.
Yes, i suppo
Hi,
Hernan Freschi wrote:
Hi, thanks for answering,
How large is your ARC / your main memory?
Probably too small to hold all metadata (1/1000 of the data amount).
=> metadata has to be read again and again
Main memory is 8GB. ARC (according to arcstat.pl) usually stays at 5-7GB
There is a common misconception about the comparison between
mirror and raidz.
You get the same performance, when you use the same number of disks.
But the resulting filesystem has a different sizre, therefore a comparison
is not applicable.
Example: you have 8 disks
Compare a zpool with one
On Wed, 2010-07-21 at 07:56 -0700, Hernan F wrote:
> Hi,
> Out of pure curiosity, I was wondering, what would happen if one tries to use
> a regular 7200RPM (or 10K) drive as slog or L2ARC (or both)?
>
> I know these are designed with SSDs in mind, and I know it's possible to use
> anything you
I have 8GB RAM, arcsz as reported by arcstat.pl is 5-7GB usually.
It took about 20-30 mins to delete the files.
Is there a way to see which files have been deduped, so I can copy them again
an un-dedupe them?
Thanks,
Hernan
--
This message posted from opensolaris.org
__
> Hi,
> Out of pure curiosity, I was wondering, what would
> happen if one tries to use a regular 7200RPM (or 10K)
> drive as slog or L2ARC (or both)?
I have done both with success.
At one point my backup pool was a collection of USB attached drives (please
keep the laughter down) with dedup=ver
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
I do encounter situations when I (or somebody from my family)
accidentally create multiple copies of photo albums. :-)
- --
Saso
On 07/21/2010 05:20 PM, Edward Ned Harvey wrote:
>> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
>> bou
On 21/07/2010 15:40, Edward Ned Harvey wrote:
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of v
for zfs raidz1, I know for random io, iops of a raidz1 vdev eqaul to
one physical disk iops, since raidz1 is like raid5 , so is raid5 has
same perf
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Saso Kiselkov
>
> If you plan on using it as a storage server for multimedia data
> (movies), don't even bother considering compression, as most media
> files
> already come heavily compressed.
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Hernan F
>
> Hi,
> Out of pure curiosity, I was wondering, what would happen if one tries
> to use a regular 7200RPM (or 10K) drive as slog or L2ARC (or both)?
I tested it once, for the same r
On 21/07/2010 16:12, Saso Kiselkov wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
If you plan on using it as a storage server for multimedia data
(movies), don't even bother considering compression, as most media files
already come heavily compressed. Dedup might still come in handy, thoug
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
If you plan on using it as a storage server for multimedia data
(movies), don't even bother considering compression, as most media files
already come heavily compressed. Dedup might still come in handy, though.
- --
Saso
On 07/21/2010 05:03 PM, Eugen
On Wed, Jul 21, 2010 at 04:56:26PM +0200, Roy Sigurd Karlsbakk wrote:
> It'll probably be ok. If you use lzjb compresion, it'll probably suffice as
> well. Give it gzip-9 compression, and you might have a cpu bottleneck, but
> then, for most use, that config will probably do. What sort of traffi
- Original Message -
> How badly would a dual-core 1.6 GHz Atom with 4 GBytes RAM
> be underpowered for serving 4-6 SATA drives? What kind of
> transfer speed (GBit Ethernet, Intel NICs) can I expect with
> raidz2 or raidz3?
It'll probably be ok. If you use lzjb compresion, it'll probably
Hi,
Out of pure curiosity, I was wondering, what would happen if one tries to use a
regular 7200RPM (or 10K) drive as slog or L2ARC (or both)?
I know these are designed with SSDs in mind, and I know it's possible to use
anything you want as cache. So would ZFS benefit from it? Would it be the sa
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of v
>
> For synchronous write, and if io is small, will the whole io be place
> on zil? or just the pointer be save into zil? what about large size io?
This one doesn't have a really clear answer
How badly would a dual-core 1.6 GHz Atom with 4 GBytes RAM
be underpowered for serving 4-6 SATA drives? What kind of
transfer speed (GBit Ethernet, Intel NICs) can I expect with
raidz2 or raidz3?
Thanks.
--
Eugen* Leitl http://leitl.org";>leitl http://leitl.org
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of v
>
> for zfs raidz1, I know for random io, iops of a raidz1 vdev eqaul to
> one physical disk iops, since raidz1 is like raid5 , so is raid5 has
> same performance like raidz1? ie. random iops
> From: Giovanni Tirloni [mailto:gtirl...@sysdroid.com]
>
> We have hundreds of servers using LACP and so far have not noticed any
> increase in the error rate.
If the error rate is not zero, you have an increased error rate.
In linux, you just do this:
sudo /sbin/ifconfig -a | grep errors | gre
> If the format utility is not displaying the WD drives
> correctly,
> then ZFS won't see them correctly either. You need to
> find out why.
>
> I would export this pool and recheck all of your
> device connections.
I didn't see it in the postings, but are the same serial numbers showing up
mult
On 7/21/2010 1:36 AM, Jorge Montes IV wrote:
I think this maybe my problem(at least I hope it is):
http://opensolaris.org/jive/thread.jspa?messageID=489905
But I am not sure what this means
"Everything in /dev/dsk and /dev/rdsk is a symlink or directory,
so you can fake them out with a temp
I think this maybe my problem(at least I hope it is):
http://opensolaris.org/jive/thread.jspa?messageID=489905
But I am not sure what this means
"Everything in /dev/dsk and /dev/rdsk is a symlink or directory,
so you can fake them out with a temporary directory and
clever use of the "zpool im
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