Monitoring metadata servers

MDS servers are a critical component of any storage cluster, and monitoring the health and state of MDS servers is a crucial task. To monitor MDS servers, use the vstorage -c <cluster_name> top command. For example:

The command above shows detailed information about the stor1 cluster. The monitoring parameters for MDS servers (highlighted in red) are the following:


MDS server identifier (ID).

The letter “M” before ID, if present, means that the given server is the master MDS server.

MDS server status.
Total time the MDS server spent writing to the local journal.
Local journal commit rate.
MDS server activity time.
Amount of physical memory the MDS server uses.
Time elapsed since the last MDS server start.
MDS server hostname or IP address.