[zfs-discuss] Changing rpool device paths/drivers

2012-10-03 Thread Jim Klimov
Hello all, It was often asked and discussed on the list about how to change rpool HDDs from AHCI to IDE mode and back, with the modern routine involving reconfiguration of the BIOS, bootup from separate live media, simple import and export of the rpool, and bootup from the rpool. The

Re: [zfs-discuss] Changing rpool device paths/drivers

2012-10-03 Thread Ray Arachelian
On 10/03/2012 05:54 AM, Jim Klimov wrote: Hello all, It was often asked and discussed on the list about how to change rpool HDDs from AHCI to IDE mode and back, with the modern routine involving reconfiguration of the BIOS, bootup from separate live media, simple import and export of the

Re: [zfs-discuss] Changing rpool device paths/drivers

2012-10-03 Thread Jim Klimov
2012-10-03 14:40, Ray Arachelian пишет: On 10/03/2012 05:54 AM, Jim Klimov wrote: Hello all, It was often asked and discussed on the list about how to change rpool HDDs from AHCI to IDE mode and back, with the modern routine involving reconfiguration of the BIOS, bootup from separate live

Re: [zfs-discuss] Changing rpool device paths/drivers

2012-10-03 Thread Fajar A. Nugraha
On Wed, Oct 3, 2012 at 5:43 PM, Jim Klimov jimkli...@cos.ru wrote: 2012-10-03 14:40, Ray Arachelian пишет: On 10/03/2012 05:54 AM, Jim Klimov wrote: Hello all, It was often asked and discussed on the list about how to change rpool HDDs from AHCI to IDE mode and back, with the modern

Re: [zfs-discuss] Failure to zfs destroy - after interrupting zfs receive

2012-10-03 Thread Ariel T. Glenn
I have the same issue as described by Ned in his email. I had a zfs recv going that deadlocked against a zfs list; after a day of leaving them hung I finally had to hard reset the box (shutdown wouldn't, since it couldn't terminate the processes). When it came back up, I wanted to zfs destroy

Re: [zfs-discuss] Failure to zfs destroy - after interrupting zfs receive

2012-10-03 Thread Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Ariel T. Glenn I have the same issue as described by Ned in his email. I had a zfs recv going that deadlocked against a zfs list; after a day of leaving them hung I finally had to hard

Re: [zfs-discuss] vm server storage mirror

2012-10-03 Thread Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Edward Ned Harvey it doesn't work right - It turns out, iscsi devices (And I presume SAS devices) are not removable storage. That means, if the device goes offline and comes back online

[zfs-discuss] Making ZIL faster

2012-10-03 Thread Schweiss, Chip
I'm in the planing stages of a rather larger ZFS system to house approximately 1 PB of data. I have only one system with SSDs for L2ARC and ZIL, The ZIL seems to be the bottle neck for large bursts of data being written.I can't confirm this for sure, but the when throwing enough data at my

Re: [zfs-discuss] Making ZIL faster

2012-10-03 Thread Timothy Coalson
I found something similar happening when writing over NFS (at significantly lower throughput than available on the system directly), specifically that effectively all data, even asynchronous writes, were being written to the ZIL, which I eventually traced (with help from Richard Elling and others

Re: [zfs-discuss] Making ZIL faster

2012-10-03 Thread Timothy Coalson
To answer your questions more directly, zilstat is what I used to check what the ZIL was doing: http://www.richardelling.com/Home/scripts-and-programs-1/zilstat While I have added a mirrored log device, I haven't tried adding multiple sets of mirror log devices, but I think it should work. I

Re: [zfs-discuss] Changing rpool device paths/drivers

2012-10-03 Thread Jim Klimov
2012-10-03 16:04, Fajar A. Nugraha wrote: On Ubuntu + zfsonlinux + root/boot on zfs, the boot script helper is smart enough to try all available device nodes, so it wouldn't matter if the dev path/id/name changed. But ONLY if there's no zpool.cache in the initramfs. Not sure how easy it would

Re: [zfs-discuss] Making ZIL faster

2012-10-03 Thread Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Schweiss, Chip How can I determine for sure that my ZIL is my bottleneck?  If it is the bottleneck, is it possible to keep adding mirrored pairs of SSDs to the ZIL to make it faster?  Or

[zfs-discuss] Trick to keeping NFS file references in kernel memory for Dtrace?

2012-10-03 Thread Mark
Hey all, So I have a couple of storage boxes (NexentaCore Illumian) and have been playing with some DTrace scripts to monitor NFS usage. Initially I ran into the (seemingly common) problem of basically everything showing up as 'Unknown', and then after some searching online I found a