Displaying 20 results from an estimated 9000 matches similar to: "# devices in raidz."
2009 Jul 10
5
Slow Resilvering Performance
I know this topic has been discussed many times... but what the hell
makes zpool resilvering so slow? I''m running OpenSolaris 2009.06.
I have had a large number of problematic disks due to a bad production
batch, leading me to resilver quite a few times, progressively
replacing each disk as it dies (and now preemptively removing disks.)
My complaint is that resilvering ends up
2010 Nov 01
6
Excruciatingly slow resilvering on X4540 (build 134)
Hello,
I''m working with someone who replaced a failed 1TB drive (50% utilized),
on an X4540 running OS build 134, and I think something must be wrong.
Last Tuesday afternoon, zpool status reported:
scrub: resilver in progress for 306h0m, 63.87% done, 173h7m to go
and a week being 168 hours, that put completion at sometime tomorrow night.
However, he just reported zpool status shows:
2007 Mar 05
3
How to interrupt a zpool scrub?
Dear all
Is there a way to stop a running scrub on a zfs pool? Same question applies to a running resilver.
Both render our fileserver unusable due to massive CPU load so we''d like to postpone them.
In the docs it says that resilvering and scrubbing survive a reboot, so I am not even sure if a reboot would stop scrubbing or resilvering.
Any help greatly appreciated!
Cheers, Thomas
2010 Apr 27
42
Performance drop during scrub?
Hi all
I have a test system with snv134 and 8x2TB drives in RAIDz2 and currently no Zil or L2ARC. I noticed the I/O speed to NFS shares on the testpool drops to something hardly usable while scrubbing the pool.
How can I address this? Will adding Zil or L2ARC help? Is it possible to tune down scrub''s priority somehow?
Best regards
roy
--
Roy Sigurd Karlsbakk
(+47) 97542685
roy at
2009 Nov 22
9
Resilver/scrub times?
Hi all!
I''ve decided to take the "big jump" and build a ZFS home filer (although it
might also do "other work" like caching DNS, mail, usenet, bittorent and so
forth). YAY! I wonder if anyone can shed some light on how long a pool scrub
would take on a fairly decent rig. These are the specs as-ordered:
Asus P5Q-EM mainboard
Core2 Quad 2.83 GHZ
8GB DDR2/80
OS:
2 x
2009 Mar 28
53
Can this be done?
I currently have a 7x1.5tb raidz1.
I want to add "phase 2" which is another 7x1.5tb raidz1
Can I add the second phase to the first phase and basically have two
raid5''s striped (in raid terms?)
Yes, I probably should upgrade the zpool format too. Currently running
snv_104. Also should upgrade to 110.
If that is possible, would anyone happen to have the simple command
lines to
2011 Jun 01
11
SATA disk perf question
I figure this group will know better than any other I have contact
with, is 700-800 I/Ops reasonable for a 7200 RPM SATA drive (1 TB Sun
badged Seagate ST31000N in a J4400) ? I have a resilver running and am
seeing about 700-800 writes/sec. on the hot spare as it resilvers.
There is no other I/O activity on this box, as this is a remote
replication target for production data. I have a the
2010 Oct 20
5
Myth? 21 disk raidz3: "Don''t put more than ___ disks in a vdev"
In a discussion a few weeks back, it was mentioned that the Best Practices
Guide says something like "Don''t put more than ___ disks into a single
vdev." At first, I challenged this idea, because I see no reason why a
21-disk raidz3 would be bad. It seems like a good thing.
I was operating on assumption that resilver time was limited by sustainable
throughput of disks, which
2008 Jan 18
7
how to relocate a disk
Hi,
I''d like to move a disk from one controller to another. This disk is
part of a mirror in a zfs pool. How can one do this without having to
export/import the pool or reboot the system?
I tried taking it offline and online again, but then zpool says the disk
is unavailable. Trying a zpool replace didn''t work because it complains
that the "new" disk is part of a
2008 Jan 23
4
Synchronous scrub?
Say I''m firing off an at(1) or cron(1) job to do scrubs, and say I want to scrub two pools sequentially
because they share one device. The first pool, BTW, is a mirror comprising of a smaller disk and a subset of a larger disk. The other pool is the remainder of the larger disk.
I see no documentation mentioning how to scrub, then wait-until-completed. I''m happy to be pointed
2010 Oct 17
10
RaidzN blocksize ... or blocksize in general ... and resilver
The default blocksize is 128K. If you are using mirrors, then each block on
disk will be 128K whenever possible. But if you''re using raidzN with a
capacity of M disks (M disks useful capacity + N disks redundancy) then the
block size on each individual disk will be 128K / M. Right? This is one of
the reasons the raidzN resilver code is inefficient. Since you end up
waiting for the
2010 Jan 16
95
Best 1.5TB drives for consumer RAID?
Which consumer-priced 1.5TB drives do people currently recommend?
I had zero read/write/checksum errors so far in 2 years with my trusty old Western Digital WD7500AAKS drives, but now I want to upgrade to a new set of drives that are big, reliable and cheap.
As of Jan 2010 it seems the price sweet spot is the 1.5TB drives.
As I had a lot of success with Western Digital drives I thought I would
2008 Jan 15
4
Moving zfs to an iscsci equallogic LUN
We have a Mirror setup in ZFS that''s 73GB (two internal disks on a sun fire v440). We currently are going to attach this system to an Equallogic Box, and will attach an ISCSCI LUN from the Equallogic box to the v440 of about 200gb. The Equallogic Box is configured as a Hardware Raid 50 (two hot spares for redundancy).
My question is what''s the best approach to moving the ZFS
2009 Jul 13
7
OpenSolaris 2008.11 - resilver still restarting
Just look at this. I thought all the restarting resilver bugs were fixed, but it looks like something odd is still happening at the start:
Status immediately after starting resilver:
# zpool status
pool: rc-pool
state: DEGRADED
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine
2007 Sep 13
26
hardware sizing for a zfs-based system?
Hi all,
I''m putting together a OpenSolaris ZFS-based system and need help
picking hardware.
I''m thinking about using this 26-disk case: [FYI: 2-disk RAID1 for the
OS & 4*(4+2) RAIDZ2 for SAN]
http://rackmountpro.com/productpage.php?prodid=2418
Regarding the mobo, cpus, and memory - I searched goggle and the ZFS
site and all I came up with so far is that, for a
2007 Sep 13
26
hardware sizing for a zfs-based system?
Hi all,
I''m putting together a OpenSolaris ZFS-based system and need help
picking hardware.
I''m thinking about using this 26-disk case: [FYI: 2-disk RAID1 for the
OS & 4*(4+2) RAIDZ2 for SAN]
http://rackmountpro.com/productpage.php?prodid=2418
Regarding the mobo, cpus, and memory - I searched goggle and the ZFS
site and all I came up with so far is that, for a
2010 Dec 20
3
Resilvering - Scrubing whats the different
Hello All
I read this thread Resilver/scrub times? for a few minutes
and I have recognize that I dont know the different between
Resilvering and Scrubing. Shame on me. :-(
I dont find some declarations in the man-pages and I know the command
to start scrubing "zpool scrub tank"
but what is the command to start resilver and what is the different?
--
Best Regards
Alexander
Dezember, 20
2008 Aug 03
1
Scrubbing only checks used data?
Hi there,
I am currently evaluating OpenSolaris as a replacement for my linux installations. I installed it as a xen domU, so there is a remote chance, that my observations are caused by xen.
First, my understanding of "zpool [i]scrub[/i]" is "Ok, go ahead, and rewrite [b]each block of each device[/b] of the zpool".
Whereas "[i]resilvering[/i]" means "Make
2010 Jul 05
5
never ending resilver
Hi list,
Here''s my case :
pool: mypool
state: DEGRADED
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scrub: resilver in progress for 147h19m, 100.00% done, 0h0m to go
config:
NAME STATE READ WRITE CKSUM
filerbackup13
2006 Jul 17
28
Big JBOD: what would you do?
ZFS fans,
I''m preparing some analyses on RAS for large JBOD systems such as
the Sun Fire X4500 (aka Thumper). Since there are zillions of possible
permutations, I need to limit the analyses to some common or desirable
scenarios. Naturally, I''d like your opinions. I''ve already got a few
scenarios in analysis, and I don''t want to spoil the brain storming, so