PRIMECLUSTER Global File Services Configuration and Administration Guide 4.1 (Linux)

3.1.3 Automatic recovery in case primary MDS goes down during primary MDS operation only

If the primary MDS goes down in a state in which the MDS nodes are degraded only during primary MDS operation, the following processing is performed automatically.

1) Restarting the failed MDS

The MDS is started as the primary MDS again.

2) Replaying the update log

The new primary MDS replays the update log to ensure the consistency of the file system.

3) Resuming processing after MDS switching

The AC makes a processing request to the new primary MDS.