Controlling the performance impact of mirror verification

You use mirror verification to ensure that the two plexes of a synchronous mirrored aggregate are identical.

Considerations

When mirror verification and RAID-level scrubbing are running at the same time, Data ONTAP limits the combined resource utilization to the greatest impact set by either operation. For example, if raid.verify.perf_impact is set to medium and raid.scrub.perf_impact is set to low, the resource utilization of both operations has a medium impact.

For more information about synchronous mirroring, see the Data Protection Online Backup and Recovery Guide.

Step

Enter the following command:options raid.verify.perf_impact impact
impact can be high, medium, or low.

high means that the storage system uses most of the system resources available for mirror verification; this setting can heavily affect storage system performance, but the mirror verification finishes faster.

low means that the storage system uses very little of the system resources; this setting lightly affects storage system performance, but the mirror verification finishes more slowly.

The default speed is low.

Parent topic: Controlling the impact of RAID operations on system performance

Controlling the performance impact of RAID-level scrubbing

Controlling the performance impact of plex resynchronization