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Can SnapMirror impact on other workloads be reduced by throttling?

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snapmirror
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dp
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Applies to

ONTAP 9

Answer

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

::> options -option-name replication*

::> 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>

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

  • The ONTAP 9 global throttle affects remote and local Type-DP and Type-XDP SnapMirrors.
  • Changing global throttle takes effect immediately, and is applied to running SnapMirror transfers as well as future transfers.
  • Changing per-relationship throttle does not affect running SnapMirror transfers, but is applied to subsequent transfers.
  • If a global throttle is not desired,  per-relationship throttle can be applied instead.

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