# [OmniOS-discuss] FW: Fibre Channel performance on OmniOS

Kyle Bruene KBruene at simmonsperrine.com
Wed Aug 20 13:36:02 UTC 2014

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    I've tried different pool configurations. Currently I have two pools: the 5 ssd's in a raidz and the 3TB's in a raidz. I get the same result from both because the cache is so large. With sync off, I get the same speed on both pools because it is just writing/reading to/from ram. I feel like there is enough hardware and was hoping to get better speed than this with more SSD's. I am assuming that if I setup some kind of ramdisk, I would still only get the 400MB/s over FC. Reading and writing to the pool(s) locally produces multiple GB/s.

    From: Randy S [mailto:sim.ple at live.nl]
    Sent: Wednesday, August 20, 2014 4:57 AM
    To: Kyle Bruene
    Subject: RE: [OmniOS-discuss] Fibre Channel performance on OmniOS

    Hi ,

    Indeed some heavy duty hardware but how did you organize your pool ?

    ________________________________
    From: KBruene at simmonsperrine.com<mailto:KBruene at simmonsperrine.com>
    To: omnios-discuss at lists.omniti.com<mailto:omnios-discuss at lists.omniti.com>
    Date: Tue, 19 Aug 2014 19:01:07 +0000
    Subject: [OmniOS-discuss] Fibre Channel performance on OmniOS
    Hi everyone,

    Last year we built a "SAN" based on OmniOS r151008. Here are the specs:
    2 x Xeon 6-core SNB
    128GB DDR3 ECC
    2 x 4 Port 4gbps Qlogic Fibre Channel cards
    2 x 8 port 6gbps SAS controllers
    2 x Brocade fibre switches.
    5 x 1TB Crucial M550 SSD
    5 x 3TB Seagate 7200rpm HDD

    My issue is that I am only able to read/write to it at about 400-500MB/s sequential. There is plenty of cache so it seems like I should be able to get more speed with multipathing on. The hosts that are connecting to it are Windows Server 2012, but I've also tried an Ubuntu box with the same result. Is there anything I need to do on the OmniOS box to allow hosts to multipath to it? I've tried both Round Robin, Least Blocks, and Least Queue with no additional speed. It will use all the paths but will not go beyond that 500ish MBps limit. Does anyone have any insight into multipathing best practices?

    Thanks.

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