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. Help us (or rather, the community) help you by providing real information and data. On Mon, Jun 7, 2010 at 19:59, besson3c <j...@netmusician.org> wrote: > Hello, > > I'm wondering if somebody can kindly direct me to a sort of newbie way of > assessing whether my ZFS pool performance is a bottleneck that can be > improved upon, and/or whether I ought to invest in a SSD ZIL mirrored pair? > I'm a little confused by what the output of iostat, fsstat, the zilstat > script, and other diagnostic tools illuminates, and I'm definitely not > completely confident with what I think I do understand. I'd like to sort of > start over from square one with my understanding of all of this. > > So, instead of my posting a bunch of numbers, could you please help me with > some basic tactics and techniques for making these assessments? I have some > reason to believe that there are some performance problems, as the loads on > the machine writing to these ZFS NFS shares can get pretty high during heavy > writing of small files. Throw in the ZFS queue parameters in addition to all > of these others numbers and variables and I'm a little confused as to where > best to start. It is also a possibility that the ZFS server is not the > bottleneck here, but I would love it if I can feel a little more confident > in my assessments. > > Thanks for your help! I expect that this conversation will get pretty > technical and that's cool (that's what I want too), but hopefully this is > enough to get the ball rolling! > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > -- "You can choose your friends, you can choose the deals." - Equity Private "If Linux is faster, it's a Solaris bug." - Phil Harman Blog - http://whatderass.blogspot.com/ Twitter - @khyron4eva
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