While using SnapMirror, you can increase the efficiency of data copying by performing certain actions. This includes the staggering of Snapshot copy schedules and SnapMirror update schedules.
- To optimize performance, stagger your Snapshot copy update schedules so that SnapMirror activity does not begin or end at the exact minute a snap sched command operation attempts to create a Snapshot copy.
If the SnapMirror feature is scheduled to perform Snapshot copy management at the same time as a snap sched activity, then the Snapshot copy management operations scheduled using the snap sched command might fail with syslog messages: "Skipping creation of hourly snapshot" and "Snapshot already exists."
- For optimum SnapMirror volume replication performance, ensure that the SnapMirror source volume and destination volume contain disks of the same size, organized in the same RAID configuration.
- If the SnapMirror source and destination are FlexVol volumes, the RAID configurations do not make a difference.
- If the SnapMirror source and destination are qtrees, volume size and configuration do not make any difference.