# [OmniOS-discuss] Slow NFS writes in 151026

Bob Friesenhahn bfriesen at simple.dallas.tx.us
Thu Aug 23 17:27:43 UTC 2018

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    On Thu, 23 Aug 2018, Doug Hughes wrote:

    > NFS writes (especially for lots of small files) to omniOS *really* benefit
    > from having ZIL on those SSD.
    >
    > You could remove the cache from the pool, carve of an 8GB chunk for ZIL on
    > each and the rest for L2arc if you want that.
    >
    > then add a mirrored zil using the 8GB chunks and the other partition for
    > l2arc
    >
    > An SSD zil helps with metadata update absorption and small files writes that
    > are synchronous over NFS. A lot. (that's my experience)

    It looks like that is what he did but it looks like an error was made
    in that a spinning disk may have been added as a log drive
    (c0t55CD2E414EC0FF43d0s0) rather than an SSD as was intended.

    Bob
    --
    Bob Friesenhahn
    bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
    GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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