4.2. Monitoring Metadata ServersΒΆ
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:
The command above shows detailed information about the stor1 cluster. The monitoring parameters for MDS servers (highlighted in red) are explained in the table below:
| Parameter | Description |
|---|---|
| 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. |
Jan 15, 2019