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What does "Spin_ops" mean in show-periodic command output?

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ontap-9
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perf
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Applies to

  • ONTAP 9

Answer

  • In "statistics-show-periodic", the object "spin-ops" are referred to the protocol IOPS which goes from N-Blade to D-Blade for processing. These are primarily metadata IOPS.
cluster2: cluster.cluster: 7/11/2023 17:31:26
  cpu  cpu    total                     fcache             total    total data     data     data cluster  cluster  cluster     disk     disk     pkts     pkts
  avg busy      ops  nfs-ops cifs-ops      ops spin-ops     recv     sent busy     recv     sent    busy     recv     sent     read    write     recv     sent
 ---- ---- -------- -------- -------- -------- -------- -------- -------- ---- -------- -------- ------- -------- -------- -------- -------- -------- --------
   4%   4%        0        0        0        0        0     443B      98B   0%     338B      98B      0%       0B       0B    206KB    201KB        4        0
   4%   4%        0        0        0        0        0     787B      27B   0%     585B      27B      0%       0B       0B    159KB    147KB        7        0
   4%   4%        0        0        0        0        0   1.16KB      87B   0%     894B      72B      0%       0B       0B   93.4KB   91.0KB       10        0
  • As not all protocol IOPS goes to D-blade for processing, there might be a difference in total ops and "spin-ops".

Additional Information

  • N-blade: The N-blade handles the networking, NFS, and CIFS requests and then translates to SpinNP requests as inputs to CSM.
  • D-blade: The D-blade which contains the WAFL file systems handles the SpinNP requests and then communicates to disks and tape devices using FC.
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