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Is it possible to throttle SnapMirror globally in ONTAP 9?

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Applies to

  • Clustered Data ONTAP
  • ONTAP 9

Answer

In Clustered Data ONTAP 8.3 and earlier, a global throttle option is not available for SnapMirror transfers. Instead, use the per-relationship SnapMirror throttle.

Example:
::> snapmirror modify -destination-path destSVM:destVolume -throttle 20000

ONTAP 9 introduces a global SnapMirror throttling option configurable via the options command in cluster shell.

Example:
::> options -option-name replication.throttle.enable <on|off>
::> options -option-name replication.throttle.incoming.max_kbs <KBps>
::> options -option-name replication.throttle.outgoing.max_kbs <KBps>

The ONTAP 9 global throttle affects remote and local Type-DP and Type-XDP SnapMirrors.

Changing global throttle takes effect immediately, while changing per-relationship throttle is reflected from the next transfer.

Note: All replication throttles in ONTAP are in KiloBytes per second.