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| <p><a id="task-gmsenable" name="task-gmsenable"></a><a id="GHCLU00078" name="GHCLU00078"></a></p> |
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| <h4><a id="sthref217" name="sthref217"></a><a id="sthref218" name="sthref218"></a>To Enable the Group Management Service</h4> |
| <a name="BEGIN" id="BEGIN"></a> |
| <p>The Group Management Service (GMS) is an in-process service that provides cluster monitoring, cluster membership, and group communication services. The GMS performs the following functions:</p> |
| <ul> |
| <li> |
| <p>Notifies registered modules in a GlassFish Server instance when one or more member instances are added to or removed from a cluster, or are suspected or confirmed to have failed.</p> |
| </li> |
| <li> |
| <p>Provides the ability to send and receive messages between cluster members.</p> |
| </li> |
| </ul> |
| <ol> |
| <li> |
| <p>In the navigation tree, expand the Clusters node.</p> |
| </li> |
| <li> |
| <p>Select the cluster for which you are enabling the Group Management Service (GMS).</p> |
| <p>The General Information page for the cluster opens.</p> |
| </li> |
| <li> |
| <p>Select the GMS Enabled checkbox to enable the GMS for the cluster.</p> |
| <p>This option is selected by default. To disable the GMS for the cluster, remove the check from the GMS Enabled checkbox.</p> |
| <p>If enabled, the Group Management Service is started in each server instance in the cluster and in the Domain Administration Server (DAS). The DAS participates in each cluster that has GMS enabled.</p> |
| </li> |
| <li> |
| <p>Click Save.</p> |
| </li> |
| </ol> |
| <a id="sthref219" name="sthref219"></a> |
| <h5>See Also</h5> |
| <ul> |
| <li> |
| <p><a href="task-gmscluster.html">To Configure Group Management Service Settings for a Cluster</a></p> |
| </li> |
| <li> |
| <p><a href="task-gms.html">To Configure the Group Management Service</a></p> |
| </li> |
| </ul> |
| |
| |
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