Why is snapmirror slow for only one relationship
Applies to
- ONTAP 9
- SnapMirror
Answer
- SnapMirror transfers with a high transfer size may cause delayed updates
- The relationship's update schedule gets delayed because a previous update operation was still running.
snapmirror_audit
logs' sample
Fri Jul 9 02:50:38 CEST 2021 DelayedUpdate[Jul 9 01:23:00]:
Operation-Uuid=
Group=none Operation-Cookie=0 action=Start source=
:
destination=
:
Fri Jul 9 02:50:38 CEST 2021 DelayedUpdate[Jul 9 01:23:00]:Operation-Uuid= Group=none Operation-Cookie=0 action=End source= destination= status=Success bytes_transferred=130583077184 network_compression_ratio=1.0:1 transfer_desc=Logical Transfer with Storage Efficiency - Optimized Directory Mode Note=Delayed update operation is queued.
- There is individual transfer throttling control for per snapmirror relationship.