ha_smith_interval - HAMON

Symptoms:

In a HA environment a false fail-over can be triggered by a client starting a vote to move to a new server.

Cause:

If a MDS doesn't reply in a specific given time a vote might initiated. As the default HA_SMITH_INTERVAL is 5 seconds if not otherwise specified in certain environments fail-overs without reason can be seen.

Fix:

• Create the file /usr/cvfs/config/ha_smith_interval and create the following line
• ha_smith_interval=<integer>  (i.e. 15 - 30 is an acceptable value)

The file is read once when StorNext starts. The integer value for the HAmon timer interval is expressed in seconds. The value can range from 3 to 1000, and the default is 5 seconds. The timer must be set identically on both servers.

Notes:

The file is read once when StorNext starts. The integer value for the HAmon timer interval is expressed in seconds. The value can range from 3 to 1000, and the default is 5 seconds. The timer must be set identically on both servers.

Affected:

StorNext versions higher 4.0

To do:

Changing (creating) the files on both servers and restart the cvfs service.