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Storage Manager NetApp NAS Performance counters

shanehoover

I was gathering some performance metrics for our NetApp volumes today and noticed a confusing discrepancy.  For a given volume, the peak of the "Total Ops/sec" graph is over 11500 ops/sec.  However, the peak "Read Ops/sec" is only ~475 ops/sec and the peak "Write Ops/sec" is only ~250 ops/sec.  My assumption was that Total Ops/sec was a simple summation of Read and Write Ops/sec.  Can anybody explain why eithe my assumption is faulty or the performance statistics are misleading?

Thanks!

Shane

  • 0

    Shane

    Storage Manager leverages the NetApp API, which has read_ops, write_ops, total_ops and other_ops.  We currently only collect read, write and total, not other.  Let me know if you would like to collect this additional metric and I can add it as a feature request.

    Brian

  • 0 in reply to bmrad

    Thanks for your reply, Brian.  I think just understanding that there are “other” operations that contribute to the total_ops counter is enlightening enough.  I am curious though, is it typical for Other operations to account for the vast majority of IOPS?  In our case, as I posted, it seems Other operations account for nearly 11000 of 11500 IO/sec.

    Thanks again,

    Shane

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