Re: [zfs-discuss] Snapshots impact on performance

2008-03-14 Thread Robert Milkowski
Hello Erblichs, Two years later... :) It turned out to be a problem with metaslabs fragmentation. Lowering recordsize to 8k helps slightly but still it's not fixed. -- Best regards, Robert Milkowskimailto:[EMAIL PROTECTED] htt

Re: [zfs-discuss] Snapshots impact on performance

2007-07-27 Thread Ɓukasz
> Same problem here (snv_60). > Robert, did you find any solutions? > > gino check this http://www.opensolaris.org/jive/thread.jspa?threadID=34423&tstart=0 Check spa_sync function time remember to change POOL_NAME ! dtrace -q -n fbt::spa_sync:entry'/(char *)(((spa_t*)arg0)->spa_name) == "POOL_

Re: [zfs-discuss] Snapshots impact on performance

2007-07-26 Thread Robert Milkowski
Hello Victor, Wednesday, June 27, 2007, 1:19:44 PM, you wrote: VL> Gino wrote: >> Same problem here (snv_60). >> Robert, did you find any solutions? VL> Couple of week ago I put together an implementation of space maps which VL> completely eliminates loops and recursion from space map alloc VL>

Re: [zfs-discuss] Snapshots impact on performance

2006-10-17 Thread Matthew Ahrens
Robert Milkowski wrote: If it happens again I'll try to get some more specific data - however it depends on when it happens as during peak hours I'll probably just destroy a snapshot to get it working. If it happens again, it would be great if you could gather some data before you destroy the

Re[2]: [zfs-discuss] Snapshots impact on performance

2006-10-17 Thread Robert Milkowski
Hello Matthew, Monday, October 16, 2006, 5:07:50 PM, you wrote: MA> Robert Milkowski wrote: >> Hello zfs-discuss, >> >> S10U2+patches. ZFS pool of about 2TB in size. Each day snapshot is >> created and 7 copies are kept. There's quota set for a file system >> however there's always at leas

Re: [zfs-discuss] Snapshots impact on performance

2006-10-16 Thread Neil Perrin
Matthew Ahrens wrote On 10/16/06 09:07,: Robert Milkowski wrote: Hello zfs-discuss, S10U2+patches. ZFS pool of about 2TB in size. Each day snapshot is created and 7 copies are kept. There's quota set for a file system however there's always at least 50GB of free space in a file system

Re: [zfs-discuss] Snapshots impact on performance

2006-10-16 Thread Matthew Ahrens
Robert Milkowski wrote: Hello zfs-discuss, S10U2+patches. ZFS pool of about 2TB in size. Each day snapshot is created and 7 copies are kept. There's quota set for a file system however there's always at least 50GB of free space in a file system (and much more in a pool). ZFS file system

[zfs-discuss] Snapshots impact on performance

2006-10-16 Thread Robert Milkowski
Hello zfs-discuss, S10U2+patches. ZFS pool of about 2TB in size. Each day snapshot is created and 7 copies are kept. There's quota set for a file system however there's always at least 50GB of free space in a file system (and much more in a pool). ZFS file system is exported over NFS. S