Viewing Mirror Status

List mirror volumes and their status using MCS and the CLI.

You can see a list of all mirror volumes and their current status in the Mirror Volumes view (in the MapR Control System, select Mirror Volumes from the dropdown menu in the Volumes pane under Data > Volumes) or using the volume list command.

To use the volume list command to explicitly list mirror volumes, you must define a filter. For example:
maprcli volume list -filter [n==<mirror name>] -columns
         n,p,mirror-percent-complete,mrt -cluster <target cluster>

Mirrors and Performance

Completion time for a mirroring operation is affected by the available network bandwidth, and the amount of data to transmit. For best performance, set the mirroring schedule according to the anticipated rate of data changes, and the available bandwidth for mirroring.