Since my name was mention, a couple of things:
(a) I'm not infallible. :-)
(b) In my posts, I swapped "slab" for "record". I really should have
said "record". It's more correct as to what's going on.
(c) It is possible for constituent drives in a RaidZ to be issued
concurrent requests for porti
On Wed, Oct 20, 2010 at 4:05 PM, Edward Ned Harvey wrote:
>> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
>> boun...@opensolaris.org] On Behalf Of Edward Ned Harvey
>>
>> 4. Guess what happens if you have 2 or 3 failed disks in your raidz3,
>> and
>> they're trying to resilver at
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Edward Ned Harvey
>
> 4. Guess what happens if you have 2 or 3 failed disks in your raidz3,
> and
> they're trying to resilver at the same time. Does the system ignore
> subsequently failed di
On Oct 18, 2010, at 6:52 AM, Edward Ned Harvey wrote:
>> From: Richard Elling [mailto:richard.ell...@gmail.com]
>>
>>> http://www.mail-archive.com/zfs-discuss@opensolaris.org/msg41998.html
>>
>> Slabs don't matter. So the rest of this argument is moot.
>
> Tell it to Erik. He might want to kno
> From: Richard Elling [mailto:richard.ell...@gmail.com]
>
> > http://www.mail-archive.com/zfs-discuss@opensolaris.org/msg41998.html
>
> Slabs don't matter. So the rest of this argument is moot.
Tell it to Erik. He might want to know. Or maybe he knows better than you.
> 2. Each slab is sprea
On Oct 16, 2010, at 4:57 AM, Edward Ned Harvey wrote:
>> From: Bob Friesenhahn [mailto:bfrie...@simple.dallas.tx.us]
>>
>>> raidzN takes a really long time to resilver (code written
>> inefficiently,
>>> it's a known problem.) If you had a huge raidz3, it would literally
>> never
>>> finish, bec
I would definitely consider raidz2 or raidz3 in several vdevs. Maximum 8-9
drives in each vdev. Not a huge 20 disc vdev.
One vdev gives you the IOPS as in one single drive. If you have three vdevs,
you get IOPS worth of three drives. That is better than one single vdev of 20
discs.
--
This me
> From: Bob Friesenhahn [mailto:bfrie...@simple.dallas.tx.us]
>
> > raidzN takes a really long time to resilver (code written
> inefficiently,
> > it's a known problem.) If you had a huge raidz3, it would literally
> never
> > finish, because it couldn't resilver as fast as new data appears. A
>
On 10/16/10 12:29 PM, Marty Scholes wrote:
On Fri, Oct 15, 2010 at 3:16 PM, Marty Scholes
wrote:
My home server's main storage is a 22 (19 + 3) disk
RAIDZ3 pool backed up hourly to a 14 (11+3) RAIDZ3
backup pool.
How long does it take to resilver a disk in that
pool? And how l
> On Fri, Oct 15, 2010 at 3:16 PM, Marty Scholes
> wrote:
> > My home server's main storage is a 22 (19 + 3) disk
> RAIDZ3 pool backed up hourly to a 14 (11+3) RAIDZ3
> backup pool.
>
> How long does it take to resilver a disk in that
> pool? And how long
> does it take to run a scrub?
>
> When
On Fri, Oct 15, 2010 at 3:16 PM, Marty Scholes wrote:
> My home server's main storage is a 22 (19 + 3) disk RAIDZ3 pool backed up
> hourly to a 14 (11+3) RAIDZ3 backup pool.
How long does it take to resilver a disk in that pool? And how long
does it take to run a scrub?
When I initially setup
Sorry, I can't not respond...
Edward Ned Harvey wrote:
> whatever you do, *don't* configure one huge raidz3.
Peter, whatever you do, *don't* make a decision based on blanket
generalizations.
> If you can afford mirrors, your risk is much lower.
> Because although it's
> hysically possible for
On Wed, 13 Oct 2010, Edward Ned Harvey wrote:
raidzN takes a really long time to resilver (code written inefficiently,
it's a known problem.) If you had a huge raidz3, it would literally never
finish, because it couldn't resilver as fast as new data appears. A week
In what way is the code wr
> From: David Magda [mailto:dma...@ee.ryerson.ca]
>
> On Wed, October 13, 2010 21:26, Edward Ned Harvey wrote:
>
> > I highly endorse mirrors for nearly all purposes.
>
> Are you a member of BAARF?
>
> http://www.miracleas.com/BAARF/BAARF2.html
Never heard of it. I don't quite get it ...
On Wed, October 13, 2010 21:26, Edward Ned Harvey wrote:
> I highly endorse mirrors for nearly all purposes.
Are you a member of BAARF?
http://www.miracleas.com/BAARF/BAARF2.html
:)
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> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Peter Taps
>
> If I have 20 disks to build a raidz3 pool, do I create one big raidz
> vdev or do I create multiple raidz3 vdevs? Is there any advantage of
> having multiple raidz3 vdevs in a si
Hello Peter,
Read the ZFS Best Practices Guide to start. If you still have questions, post
back to the list.
http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide#Storage_Pool_Performance_Considerations
-Scott
On Oct 13, 2010, at 3:21 PM, Peter Taps wrote:
> Folks,
>
> If
Folks,
If I have 20 disks to build a raidz3 pool, do I create one big raidz vdev or do
I create multiple raidz3 vdevs? Is there any advantage of having multiple
raidz3 vdevs in a single pool?
Thank you in advance for your help.
Regards,
Peter
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