Need recommendation for tuning centos 6.4 for high iop's on virual machines and physical machines

Posted on 2014-08-01
Last Modified: 2014-08-18
Hi All,

I need your recommendation for tuning my virtual machines and physical machines for high IOps and network xerfs with centos 6.4.... please advice what all diffrent kernel parameter i could tune or modify or any other suggestion?
Question by:apunkabollywood
    LVL 61

    Accepted Solution

    Systems can sustain nearly unlimited IOPs while normal disks are 1000 times slower.
    300MBps SATA does 300000KB/s which is about 75000 IOPs in 4k blocks
    You are lucky if SSD disk gives half of that
    Mechanical drives allow one write per revolution, so count sorry IOPs from rpms.

    What is a xerf?
    LVL 25

    Assisted Solution

    IO tuning will be very usage-dependant. you may wish to post details. if there was a generic way to tune kernels to achieve higher IO, it would be set as the default.

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