45 messages in org.freebsd.freebsd-fsRE: Areca vs. ZFS performance testing.| From | Sent On | Attachments |
|---|---|---|
| Jeremy Chadwick | Oct 30, 2008 8:31 pm | |
| Danny Carroll | Oct 30, 2008 9:07 pm | |
| Jeremy Chadwick | Oct 30, 2008 9:33 pm | |
| Andrew Snow | Oct 30, 2008 9:43 pm | |
| Danny Carroll | Oct 30, 2008 9:47 pm | |
| Danny Carroll | Oct 30, 2008 9:49 pm | |
| Danny Carroll | Oct 30, 2008 9:54 pm | |
| Simun Mikecin | Oct 31, 2008 2:20 am | |
| Simun Mikecin | Oct 31, 2008 4:56 am | |
| Peter Schuller | Nov 2, 2008 7:08 am | |
| Simun Mikecin | Nov 3, 2008 12:31 am | |
| Dieter | Nov 12, 2008 2:57 pm | |
| Danny Carroll | Nov 12, 2008 9:46 pm | |
| Jeremy Chadwick | Nov 12, 2008 11:42 pm | |
| Willem Jan Withagen | Nov 13, 2008 12:32 am | |
| Danny Carroll | Nov 13, 2008 3:09 am | |
| Danny Carroll | Nov 13, 2008 5:58 am | |
| Nikolay Denev | Nov 13, 2008 7:05 am | |
| Scott Long | Nov 13, 2008 8:49 am | |
| Danny Carroll | Nov 13, 2008 12:46 pm | |
| Danny Carroll | Nov 13, 2008 12:59 pm | |
| Eirik Øverby | Nov 16, 2008 12:26 pm | |
| Danny Carroll | Nov 16, 2008 7:15 pm | |
| Matt Simerson | Nov 16, 2008 10:06 pm | |
| Jeremy Chadwick | Nov 16, 2008 11:07 pm | |
| Wes Morgan | Nov 17, 2008 3:26 am | |
| Danny Carroll | Nov 17, 2008 3:42 am | |
| Matt Simerson | Nov 17, 2008 1:04 pm | |
| Matt Simerson | Nov 17, 2008 2:07 pm | |
| Danny Carroll | Nov 17, 2008 3:45 pm | |
| Jan Mikkelsen | Dec 2, 2008 2:38 am | |
| Wes Morgan | Dec 2, 2008 4:04 am | |
| Danny Carroll | Jan 7, 2009 4:33 pm | |
| Zaphod Beeblebrox | Jan 7, 2009 11:40 pm | |
| Koen Smits | Jan 7, 2009 11:48 pm | |
| Nikolay Denev | Jan 8, 2009 1:19 am | |
| Danny Carroll | Jan 8, 2009 6:29 pm | |
| Koen Smits | Jan 9, 2009 12:46 am | |
| Danny Carroll | Jan 9, 2009 1:02 am | |
| Koen Smits | Jan 9, 2009 7:57 am | |
| Andrew Snow | Jan 9, 2009 6:38 pm | |
| Danny Carroll | Jan 9, 2009 8:58 pm | |
| Danny Carroll | Jan 20, 2009 10:40 pm | |
| Koen Smits | Jan 21, 2009 1:15 am | |
| Danny Carroll | Jan 21, 2009 5:14 am |
| Subject: | RE: Areca vs. ZFS performance testing. | |
|---|---|---|
| From: | Wes Morgan (morg...@chemikals.org) | |
| Date: | Dec 2, 2008 4:04:00 am | |
| List: | org.freebsd.freebsd-fs | |
On Tue, 2 Dec 2008, Jan Mikkelsen wrote:
Hi,
Wes Morgan wrote:
On Sun, 16 Nov 2008, Matt Simerson wrote:
The Areca cards do NOT have the cache enabled by default. I ordered the optional battery and RAM upgrade for my collection of 1231ML cards. Even with the BBWC, the cache is not enabled by default. I had to go out of my way to enable it, on every single controller.
Are you using these areca cards successfully with large arrays? I found a 1680i card for a decent price and installed it this weekend, but since then I'm seeing the raidz2 pool that it's running hang so frequently that I can't even trust using it. The hangs occur in both 7-stable and 8-current with the new ZFS patch. Same exact settings that have been rock solid for me before now don't want to work at all. The drives are just set as JBOD -- the controller actually defaulted to this, so I didn't have to make any real changes in the BIOS.
Any tips on your setup? Did you have any similar problems?
I am seeing I/O related lockups on 7.1-PRE with an Areca ARC-1220 controller and eight drives in a RAID-6 array. The same hardware works fine with 6.3.
When I run gstat while it is happening I see I/O performance drop and the time to service each write (ms/w) goes up, and then suddenly goes back down to a sensible value. I have seen it get to about 22000ms.
The system is essentially unusable for writes, which limits the utility a bit. Reads seem fine.
Is this similar to the behaviour you saw?
Not quite. The zfs deadlock/hang effected both reads and writes, blocking either of them indefinitely. They were "fixed" by the most recent set of patches in -current.
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