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:

MDSID

MDS server identifier (ID).

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

STATUS

MDS server status.

%CTIME

Total time the MDS server spent writing to the local journal.

COMMITS

Local journal commit rate.

%CPU

MDS server activity time.

MEM

Amount of physical memory the MDS server uses.

UPTIME

Time elapsed since the last MDS server start.

HOST

MDS server hostname or IP address.