4.2. Monitoring Metadata Servers

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

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

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.