<blockquote>It would be helpful if you posted more information about your configuration. Numbers *are* useful too, but minimally, describing your setup, use case, the hardware and other such facts would provide people a place to start.
There are much brighter stars on this list than myself, but if you are sharing your ZFS dataset(s) via NFS with a heavy traffic load (particularly writes), a mirrored SLOG will probably be useful. (The ZIL is a component of every ZFS pool. A SLOG is a device, usually an SSD or mirrored pair of SSDs, on which you can locate your ZIL for enhanced *synchronous* write performance.) Since ZFS does sync writes, that might be a win for you, but again it depends on a lot of factors.</blockquote> Sure! The pool consists of 6 SATA drives configured as RAID-Z. There are no special read or write cache drives. This pool is shared to several VMs via NFS, these VMs manage email, web, and a Quickbooks server running on FreeBSD, Linux, and Windows. On heavy reads or writes (writes seem to be more problematic) my load averages on my VM host shoot up and overall performance is bogged down. I suspect that I do need a mirrored SLOG, but I'm wondering what the best way is to go about assessing this so that I can be more certain about this? I'm also wondering what other sorts of things can be tweaked software-wise on either the VM host (running CentOS) or Solaris side to give me a little more headroom? The thought has crossed my mind that a dedicated SLOG pair of SSDs might be overkill for my needs, this is not a huge business (yet :) Thanks for your help! -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
