# [OmniOS-discuss] Status of TRIM support?

Dan Swartzendruber dswartz at druber.com
Wed May 28 13:51:36 UTC 2014

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    (merging comments to Saso and Jim)

    I don't think I mentioned my environment - if not, my apologies.  This is
    a SOHO/Lab setup, so things like zeusram are non-starters.  The basic
    network infrastructure is gigabit, so iSCSI ZIL would suck badly, I
    suspect.  As far as over-provisioning the 840PRO, I have it sliced for
    16GB.  Once it's been running for awhile, I will re-run the disk
    benchmark.  I understand the 840PRO doesn't have a supercap - this was
    basically just a performance analysis to see how it stacks up compared to
    sync=disabled and on-pool ZIL.  If I go this route, I will need to look
    for a decent/affordable unit with supercap.  One other test I can try is
    with a 15K 76GB SAS 2.5-inch drive I salvaged from a dead server.  It
    should have about 1/2 the latency of a 7200rpm sata drive, and if so would
    get me up to about 40MB/sec, which is still not good, but better than
    on-pool ZIL.  I'll find out later.  I have googled a fair amount and there
    seems to be 'work in progress' for TRIM support for ZoL and illumos, but
    no real indication I could find as to when either might support it.

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