Re: [zfs-discuss] SAS/short stroking vs. SSDs for ZIL

2010-12-28 Thread Bob Friesenhahn
On Tue, 28 Dec 2010, Edward Ned Harvey wrote: In any event, the relevant points are: The question of IOPS here is relevant to conversation because of ZIL dedicated log. If you have advanced short-stroking to get the write latency of a log device down to zero, then it can compete against SSD fo

Re: [zfs-discuss] SAS/short stroking vs. SSDs for ZIL

2010-12-28 Thread Edward Ned Harvey
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Edward Ned Harvey > > Ok, what we've hit here is two people using the same word to talk about > different things. Apples to oranges, as it were. Both meanings of "IOPS" > are ok, but context

Re: [zfs-discuss] BOOT, ZIL, L2ARC one one SSD?

2010-12-28 Thread Brandon High
On Wed, Dec 22, 2010 at 9:27 PM, Bill Werner wrote: > on a single 60GB SSD drive, use FDISK to create 3 physical partitions, a 20GB > for boot, a 30GB for L2ARC and a 10GB for ZIL?   Or is 3 physical Solaris > partitions on a disk not considered the entire disk as far as ZFS is > concerned? So

Re: [zfs-discuss] Intermittent ZFS hang

2010-12-28 Thread Robin Axelsson
The HBA I use is an LSI MegaRAID 1038E-R but I guess it doesn't really matter as most OEM manufacturers such as Dell, Intel, HP, IBM use the LSI 1068e/1078e or the newer 2008e/2018e Megaraid chips which I believe use pretty much the same firmware. So I guess I could change these settings in the