.. _Monitoring Metadata Servers:

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:

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**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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