Re: [zfs-discuss] Does the zpool cache file affect import?

2011-08-30 Thread Hung-Sheng Tsao (Lao Tsao 老曹) Ph.D.
IMHO, you need to know how to recover the Zpool if the data/metadata get corrupt due to import by two hosts may be things are improved for zfs recently. you design cluster by certain rules, hope that all SA(not just you) will follow your rules, otherwise some SA may just import zpool that crea

Re: [zfs-discuss] Does the zpool cache file affect import?

2011-08-30 Thread Garrett D'Amore
On 08/30/2011 04:59 AM, "Hung-Sheng Tsao (Lao Tsao 老曹) Ph.D." wrote: IMHO, you need to know how to recover the Zpool if the data/metadata get corrupt due to import by two hosts may be things are improved for zfs recently. you design cluster by certain rules, hope that all SA(not just you) wil

Re: [zfs-discuss] Advice with SSD, ZIL and L2ARC

2011-08-30 Thread Edward Ned Harvey
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Jesus Cea > > 1. Is the L2ARC data stored in the SSD checksummed?. If so, can I > expect that ZFS goes directly to the disk if the checksum is wrong?. Yup. > 2. Can I import a POOL if one/bo

Re: [zfs-discuss] Advice with SSD, ZIL and L2ARC

2011-08-30 Thread Neil Perrin
On 08/30/11 08:31, Edward Ned Harvey wrote: From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Jesus Cea 10. What happens if my 1GB of ZIL is too optimistic?. Will ZFS use the disks or it will stop writers until flushing ZIL to the HDs?.

Re: [zfs-discuss] Advice with SSD, ZIL and L2ARC

2011-08-30 Thread Darren J Moffat
On 08/30/11 15:31, Edward Ned Harvey wrote: From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Jesus Cea 1. Is the L2ARC data stored in the SSD checksummed?. If so, can I expect that ZFS goes directly to the disk if the checksum is wrong?. Yup.

Re: [zfs-discuss] ZFS raidz on top of hardware raid0

2011-08-30 Thread Daniel Carosone
On Mon, Aug 29, 2011 at 11:40:34PM -0400, Edward Ned Harvey wrote: > > On Sat, Aug 27, 2011 at 08:44:13AM -0700, Richard Elling wrote: > > > I'm getting a but tired of people designing for fast resilvering. > > > > It is a design consideration, regardless, though your point is valid > > that it sh

Re: [zfs-discuss] Advice with SSD, ZIL and L2ARC

2011-08-30 Thread Daniel Carosone
On Tue, Aug 30, 2011 at 03:53:48PM +0100, Darren J Moffat wrote: > On 08/30/11 15:31, Edward Ned Harvey wrote: >>> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- >>> boun...@opensolaris.org] On Behalf Of Jesus Cea >>> >>> 1. Is the L2ARC data stored in the SSD checksummed?. If so, c