[zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-15 Thread Yaniv Aknin
Hello friends, I've recently seen a strange phenomenon with ZFS on Solaris 10u3, and was wondering if someone may have more information. The system uses several zpools, each a bit under 10T, each containing one zfs with lots and lots of small files (way too many, about 100m files and 75m direc

Re: [zfs-discuss] scrub halts

2007-08-15 Thread Al Hopper
On Tue, 14 Aug 2007, Richard Elling wrote: > Rick Wager wrote: >> We see similar problems on a SuperMicro with 5 500 GB Seagate sata drives. >> This is using the AHCI driver. We do not, however, see problems with the >> same hardware/drivers if we use 250GB drives. > > Duh. The error is from th

Re: [zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-15 Thread johansen-osdev
You might also consider taking a look at this thread: http://mail.opensolaris.org/pipermail/zfs-discuss/2007-July/041760.html Although I'm not certain, this sounds a lot like the other pool fragmentation issues. -j On Wed, Aug 15, 2007 at 01:11:40AM -0700, Yaniv Aknin wrote: > Hello friends, >

Re: [zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-15 Thread michael schuster
Yaniv, I'm adding dtrace-discuss to this email for reasons that will be obvious immediately :-) - see below Yaniv Aknin wrote: > When volumes approach 90% usage, and under medium/light load (zpool > iostat reports 50mb/s and 750iops reads), some creat64 system calls take > over 50 seconds to co

Re: [zfs-discuss] restore lost pool after vtoc re-label

2007-08-15 Thread Robert Milkowski
Hello o, Wednesday, August 15, 2007, 12:17:04 AM, you wrote: op> hi all, op> i've been using a SAN LUN as the sole member of a zpool with one op> additional zfs filesystem. this is a flat SAN fabric, so this LUN op> was available to other systems on the fabric, and one of them came op> up with "

Re: [zfs-discuss] dfratime on zfs

2007-08-15 Thread David Bustos
Quoth Darren J Moffat on Thu, Aug 09, 2007 at 10:32:02AM +0100: > Prompted by a recent /. article on atime vs realtime ranting by some > Linux kernel hackers (Linus included) I went back and looked at the > mount_ufs(1M) man page because I was sure that OpenSolaris had more than > just atime,noa

Re: [zfs-discuss] scrub halts

2007-08-15 Thread Gary Gendel
Al, That makes so much sense that I can't believe I missed it. One bay was the one giving me the problems. Switching drives didn't affect that. Switching cabling didn't affect that. Changing Sata controllers didn't affect that. However, reorienting the case on it's side did! I'll be putting in

[zfs-discuss] Opensolaris ZFS version & Sol10U4 compatibility

2007-08-15 Thread David Evans
As the release date Solaris 10 Update 4 approaches (hope, hope), I was wondering if someone could comment on which versions of opensolaris ZFS will seamlessly work when imported. Thanks. dce This message posted from opensolaris.org ___ zfs-discus

Re: [zfs-discuss] dfratime on zfs

2007-08-15 Thread Darren Dunham
> > Prompted by a recent /. article on atime vs realtime ranting by some > > Linux kernel hackers (Linus included) I went back and looked at the > > mount_ufs(1M) man page because I was sure that OpenSolaris had more than > > just atime,noatime. Yep sure enough UFS has dfratime. > > > > So tha