Re: [zfs-discuss] user quotas vs filesystem quotas?

2006-08-14 Thread Darren J Moffat
Jeff A. Earickson wrote: Are there any plans/schemes for per-user quotas within a ZFS filesystem, akin to the UFS quotaon(1M) mechanism? I take it that quotaon won't work with a ZFS filesystem, right? Suggestions please? My notion right now is to drop quotas for /var/mail. An alternative m

Re: [zfs-discuss] Proposal: zfs create -o

2006-08-14 Thread Darren J Moffat
Eric Schrock wrote: This case adds a new option, 'zfs create -o', which allows for any ZFS property to be set at creation time. Multiple '-o' options can appear in the same subcommand. Specifying the same property multiple times in the same command results in an error. For example: #

Re: [zfs-discuss] Significant "pauses" during zfs writes

2006-08-14 Thread Nathan Kroenert
Hey, Bob - It might be worth exploring where your data stream for the writes was coming from. Moreover, it might be worth exploring how fast it was filling up caches for writing. Were you delivering enough data to keep the disks busy 100% of the time? I have been tricked by this before... :) N

Re: [zfs-discuss] Re: 3510 HW RAID vs 3510 JBOD ZFS SOFTWARE RAID

2006-08-14 Thread Neil Perrin
Robert Milkowski wrote: ps. however I'm really concerned with ZFS behavior when a pool is almost full, there're lot of write transactions to that pool and server is restarted forcibly or panics. I observed that file systems on that pool will mount in 10-30 minutes each during zfs mount -a, and o

Re: [zfs-discuss] Re: Significant "pauses" during zfs writes

2006-08-14 Thread Roch
Bob Evans writes: > One last tidbit, for what it is worth. Rather than watch top, I ran > xcpustate. It seems that just as the writes pause, the cpu looks like > it hits 100% (or very close), then it falls back down to its lower > level. > > I'm still getting used to Solaris 10 as well,

[zfs-discuss] Re: Significant "pauses" during zfs writes

2006-08-14 Thread Bob Evans
One last tidbit, for what it is worth. Rather than watch top, I ran xcpustate. It seems that just as the writes pause, the cpu looks like it hits 100% (or very close), then it falls back down to its lower level. I'm still getting used to Solaris 10 as well, so if you have a DTrace script you'

Re: [zfs-discuss] Re: Significant "pauses" during zfs writes

2006-08-14 Thread Roch
Bob Evans writes: > I'm starting simple, there is no app. > > I have a 10GB file (called foo) on the internal FC drive, I did a zfs create > raidz bar > then ran "cp foo /bar/", so there is no cpu activity due to an app. > > As a test case, this took 7 min 30 sec to copy to the zfs

[zfs-discuss] Re: Significant "pauses" during zfs writes

2006-08-14 Thread Bob Evans
As added information, top reports that "cp" is using about 25% of the single cpu. There are no other apps running. Bob This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mai

[zfs-discuss] Re: Significant "pauses" during zfs writes

2006-08-14 Thread Bob Evans
I'm starting simple, there is no app. I have a 10GB file (called foo) on the internal FC drive, I did a zfs create raidz bar then ran "cp foo /bar/", so there is no cpu activity due to an app. As a test case, this took 7 min 30 sec to copy to the zfs partition. I removed the pool, formatt

Re: [zfs-discuss] Re: Lots of seeks?

2006-08-14 Thread Roch
Incidentally, this is part of how QFS gets its performance for streaming I/O. We use an "allocate forward" policy, allow very largeallocation blocks, and separate the metadata from data. This allows us to write (or read) data in fairly large I/O requests, without unne

Re: [zfs-discuss] Significant "pauses" during zfs writes

2006-08-14 Thread Roch
Neil Perrin writes: > Yes James is right this is normal behaviour. Unless the writes are > synchronous (O_DSYNC) or explicitely flushed (fsync()) then they > are batched up, written out and committed as a transaction > every txg_time (5 seconds). > > Neil. > > James C. McPherson wrote:

Re: [zfs-discuss] Significant "pauses" during zfs writes

2006-08-14 Thread Neil Perrin
Yes James is right this is normal behaviour. Unless the writes are synchronous (O_DSYNC) or explicitely flushed (fsync()) then they are batched up, written out and committed as a transaction every txg_time (5 seconds). Neil. James C. McPherson wrote: Bob Evans wrote: Just getting my feet wet

Re: [zfs-discuss] Significant "pauses" during zfs writes

2006-08-14 Thread Roch
Hi Bob, Looks like : 6415647 Sequential writing is jumping http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6415647 -r Roch BourbonnaisSun Microsystems, Icnc-Grenoble Senior

Re: [zfs-discuss] Significant "pauses" during zfs writes

2006-08-14 Thread James C. McPherson
Bob Evans wrote: Just getting my feet wet with zfs. I set up a test system (Sunblade 1000, dual channel scsi card, disk array with 14x18GB 15K RPM SCSI disks) and was trying to write a large file (10 GB) to the array to see how it performed. I configured the raid using raidz. During the write,

[zfs-discuss] Significant "pauses" during zfs writes

2006-08-14 Thread Bob Evans
HI, Just getting my feet wet with zfs. I set up a test system (Sunblade 1000, dual channel scsi card, disk array with 14x18GB 15K RPM SCSI disks) and was trying to write a large file (10 GB) to the array to see how it performed. I configured the raid using raidz. During the write, I saw the

Re: [zfs-discuss] Re: System hangs on SCSI error

2006-08-14 Thread Brad Plecs
> Brad, > > I have a suspicion about what you might be seeing and I want to confirm > it. If it locks up again you can also collect a threadlist: > > "echo $ > Send me the output and that will be a good starting point. I tried popping out a disk again, but for whatever reason, the system just

Re: [zfs-discuss] scrub problem

2006-08-14 Thread Mark Maybee
Robert Milkowski wrote: Hello Mark, Sunday, August 13, 2006, 8:00:31 PM, you wrote: MM> Robert Milkowski wrote: Hello zfs-discuss, bash-3.00# zpool status nfs-s5-s6 pool: nfs-s5-s6 state: ONLINE status: One or more devices has experienced an unrecoverable error. An attempt was made

Re: [zfs-discuss] Re: 3510 HW RAID vs 3510 JBOD ZFS SOFTWARE RAID

2006-08-14 Thread Roch
The test case was build 38, Solaris 11, a 2 GB file, initially created with 1 MB SW, and a recsize of 8 KB, on a pool with two raid-z 5+1, accessed with 24 threads of 8 KB RW, for 500,000 ops or 40 seconds which ever came first. The result at the pool level was 78% of the operations

Re: [zfs-discuss] Unreliable ZFS backups or....

2006-08-14 Thread przemolicc
On Fri, Aug 11, 2006 at 05:25:11PM -0700, Peter Looyenga wrote: > I looked into backing up ZFS and quite honostly I can't say I am convinced > about its usefullness here when compared to the traditional ufsdump/restore. > While snapshots are nice they can never substitute offline backups. And >