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Monitoring Metadata Servers
MDS servers are a critical component of any Parallels Cloud Storage cluster, and monitoring the health and state of MDS servers is a very critical task. To monitor MDS servers, use the
pstorage -c
<cluster_name>
top
command, for example:
The command above shows detailed information about the
pcs1
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. |
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