.. _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 top`` command, for example: .. image:: /images/image022.png :align: center :class: align-center 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. | +-------------------------------+-----------------------------------------------------------------------------------------------+