Heartbeat

Note

This feature is only available in NCache Enterprise Edition.

Communication between cluster nodes is critical for smooth cluster operations. Therefore, NCache provides Heart Beat for the clusters to detect connection breakage with any node of the cluster. Connection breakage may occur due to an unplugged network cable or disabling of a network connection. When this option is enabled, a node of a cluster sends some dummy packets to other nodes and waits for acknowledgment. Therefore, if live nodes do not receive acknowledgments from any idle node after specific duration, they will consider it dead and will update their views by excluding it from the cluster.

There will be no overhead of heartbeat messages when all nodes are active and sending messages to each other.

Using NCache Web Manager

Launch NCache Web Manager by browsing to http://localhost:8251 (Windows) or <server-ip>:8251 (Windows + Linux).
In the left navigation bar, click on Clustered Caches or Local Caches, based on the cache to configure.
Against the cache name, click on View Details.

View Details Heartbeat Web

This opens up the detailed configuration page for the cache. Go to the Advanced Settings tab and click on Cluster Settings in the left bar.
Check the Use Heart Beat checkbox to enable heart beat.

Use Heartbeat Web

Click on Save Changes to apply this configuration to the cache.

Manually Editing NCache Configuration

Important

Make sure the cache is stopped before making any configuration changes.

Enable/disable heartbeat through config.ncconf by specifying the use-heart-beat key in the <cluster-settings> tag:

 <cache-settings ...>
   <cache-topology topology="partitioned">
     <cluster-settings operation-timeout="60sec" stats-repl-interval="1sec" use-heart-beat="True">
      ...
     </cluster-settings>
   </cache-topology>
</cache-settings>

Once changes are made, start the cache and restart NCache service.

Heartbeat

Note

Using NCache Web Manager

Manually Editing NCache Configuration

Important

See Also