Re: [zfs-discuss] Cold failover of COMSTAR iSCSI targets on shared storage

2012-10-01 Thread Evaldas Auryla
On 26/09/12 00:52, Richard Elling wrote: On Sep 25, 2012, at 1:32 PM, Jim Klimov > wrote: Q: Which services are the complete list needed to set up the COMSTAR server from scratch? Dunno off the top of my head. Network isn't needed (COMSTAR can serve FC), but you can

Re: [zfs-discuss] vm server storage mirror

2012-10-01 Thread Jim Klimov
2012-09-27 3:11, Richard Elling wrote: Option 2:At present, both systems are using local mirroring ,3 mirror pairs of 6 disks.I could break these mirrors, and export one side over to the other system...And vice versa.So neither server will be doing local mirroring; they will both be mirroring acr

Re: [zfs-discuss] vm server storage mirror

2012-10-01 Thread Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Jim Klimov > > > If they are close enough for "crossover cable" where the cable is UTP, > > then they are > > close enough for SAS. > > Pardon my ignorance, can a system easily serve its local

Re: [zfs-discuss] Best way to measure performance of ZIL

2012-10-01 Thread Dan Swartzendruber
Matt, how about running the same disk benchmark(s), with sync=disabled vs sync=enabled and the ZIL accelerator in place? _ From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Matt Van Mater Sent: Monday, October 01, 2012 9:19 AM To: zfs-disc

Re: [zfs-discuss] Best way to measure performance of ZIL

2012-10-01 Thread Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > > --- How how will improving ZIL latency improve performance of my pool that > is used as a NFS share to ESXi hosts which forces sync writes only (i.e will > it be > noticeable in an end-to-end context)? Just perform a bunch of w

Re: [zfs-discuss] Best way to measure performance of ZIL

2012-10-01 Thread Tim Swast
On 10/01/2012 09:09 AM, Edward Ned Harvey (opensolarisisdeadlongliveopensolaris) wrote: Just perform a bunch of writes, time it. Then set sync=disabled, perform the same set of writes, time it. Then enable sync, add a ZIL device, time it. The third option will be somewhere in between the first

Re: [zfs-discuss] vm server storage mirror

2012-10-01 Thread Jim Klimov
2012-10-01 17:07, Edward Ned Harvey (opensolarisisdeadlongliveopensolaris) пишет: Well, now I know why it's stupid. Cuz 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 again