# [OmniOS-discuss] infiniband

Michael Rasmussen mir at miras.org
Fri Nov 7 22:49:51 UTC 2014

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    Hi all,

    My endeavor into infiniband has proven to be a relatively easy task,
    much easier than expected, however two problems is still unresolved
    which is the reason to address this list.

    1) Since I have dual port HCA's I first tried to configure both ports
    on the same subnet looking for a way to instruct omnios to ignore arp
    request (in linux the tunable is arp_ignore=1). I have not be able to
    find this tunable in omnios so I have therefore created the ports on
    different subnets. This problem is minor though.

    2) Performance is much slower than on Linux (Debian Stable). iperf
    between two linux boxes shows 7.29 gbps which is max performance.
    Between omnios an linux I am not able to pass 2.77 gbps which is
    disappointing. Is there some tunable I can fiddle with to increase
    performance?

    --
    Hilsen/Regards
    Michael Rasmussen

    Get my public GnuPG keys:
    michael <at> rasmussen <dot> cc
    http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xD3C9A00E
    mir <at> datanom <dot> net
    http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE501F51C
    mir <at> miras <dot> org
    http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE3E80917
    --------------------------------------------------------------
    /usr/games/fortune -es says:
    Aliquid melius quam pessimum optimum non est.
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