# [OmniOS-discuss] zfs compression limits write throughput to 100MB/sec

Matthew Lagoe matthew.lagoe at subrigo.net
Mon Sep 14 19:40:29 UTC 2015

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    Also I believe the compression is not threaded as well as it could be so you
    may be limited by the single core performance of your machine.

    -----Original Message-----
    From: OmniOS-discuss [mailto:omnios-discuss-bounces at lists.omniti.com] On
    Behalf Of Saso Kiselkov
    Sent: Monday, September 14, 2015 12:34 PM
    To: Doug Hughes
    Cc: omnios-discuss at lists.omniti.com
    Subject: Re: [OmniOS-discuss] zfs compression limits write throughput to
    100MB/sec

    On 9/14/15 9:18 PM, Doug Hughes wrote:
    > That does seem to keep performance at much closer to parity. It still
    > seems about 70-80% of peak vs what I was seeing before, but not that
    > 100MB/sec bottleneck.

    Well, that's the reality of compression. Even the compressibility check is
    not free, but it's a lot less of an impact with lz4 than with lzjb.

    Cheers,
    --
    Saso
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