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Using Netscape Application Server Administrator to Configure Clusters
After you install a version 2.1 Netscape Application Server, you can perform the following tasks to configure clusters:

To perform these tasks, change the data synchronization settings in the registry that control cluster configuration. There are two ways to change these settings: use the kregedit command to edit the registry directly, or use Netscape Application Server Administrator to manipulate the registry settings.

This section explains how to use Netscape Application Server Administrator to configure clusters. Note that to properly configure a cluster using Netscape Application Server Administrator, you must register all the servers in the cluster. Otherwise, configuration changes will not apply across all the servers in the cluster. To register a Netscape Application Server, see "Registering a Netscape Application Server" on page 141.

For information about editing the registry directly, see the various sections earlier in this chapter that discuss how to edit the registry to configure clusters.

Note: Configuring clusters with Netscape Application Server Administrator works only with version 2.1 of Netscape Application Server.

Adding a Server to a Cluster
To add an unassigned server to a cluster, or to reassign a server to a different cluster, follow these steps.

  1. Open the Configuration tool of the Netscape Application Server Administrator.

  2. Click the Cluster Settings tab.

    3. A list of registered servers is displayed on the left, and another list of servers, sorted by priority in a cluster, is displayed on the right.

    Note that if a server in a cluster is not registered with your Netscape Application Server Administrator, it appears in the priority list on the right as an IP address - port number pair. A registered server appears as a registered server name followed by a host name - port number pair. This is an example of an unregistered server that appears in the list of servers within a cluster:

    204.29.187.97:10818

    204.29.187.97 is the IP address of the unregistered server. 10818 is the port number to the Executive Server (KXS).

    This is an example of a registered server appearing in the list of servers within a cluster:

    NAS1 (machine1.mcom.com:10818)

    NAS1 is the name of the registered server, machine1.com.com is the host name of the server, and 10817 is the port number to the KAS server.

  3. On the All Registered Servers list, click the name of the server you want to add to a cluster.

    4. A server that is not a member of a cluster, hence not participating in data synchronization, is listed under Default, in the cluster list on the right.

  4. Under Cluster Name, do one of the following:

    5. Cluster Name is populated with the cluster names that all registered servers belong to. If the servers in a cluster are not registered by your Netscape Application Server Administrator tool, then that cluster does not appear in Cluster Name. For the name of a cluster to appear in Cluster Name, you must register one or more of the servers in that cluster.

  5. Click Apply Changes

  6. Shut down and restart every server in the cluster, including the server you just added. For changes to apply across the cluster, you must restart every machine, so as to reload the memory on each machine with the cluster configuration changes. If at least one machine has a different cluster configuration loaded into memory than the other machines in the cluster, the new settings will not take effect and data synchronization will not work properly.

  7. If when adding the server to a cluster, you removed it from another, you must also shut down and restart every server in the cluster from which it was removed.
Removing a Server From a Cluster
To remove a server from a cluster, follow these steps.

  1. Open the Configuration tool of the Netscape Application Server Administrator.

  2. Click the Cluster Settings tab.

    3. A list of registered servers is displayed on the left, and another list of servers, sorted by priority in a cluster, is displayed on the right.

    Note that if a server in a cluster is not registered with your Netscape Application Server Administrator, it appears in the priority list on the right as an IP address - port number pair. A registered server appears as a registered server name followed by a host name - port number pair. This is an example of an unregistered server appearing in the list of servers within a cluster:

    204.29.187.97:10818

    204.29.187.97 is the IP address of the unregistered server. 10818 is the port number to the KAS server

    This is an example of a registered server appearing in the list of servers within a cluster:

    NAS1 (machine1.mcom.com:10818)

    NAS1 is the name of the registered server, machine1.com.com is the host name of the server, and 10817 is the port number to the Executive Server (KXS).

  3. On the All Registered Servers list, click the name of the server you want to remove from the cluster.

    4. You can remove a server from a cluster only when it is assigned to a cluster and registered with your Netscape Application Server Administrator. A server that is not a member of a cluster, hence not participating in data synchronization, is listed under Default, in the cluster list on the right. You cannot remove a server from the Default list.

    Note that you cannot remove an unregistered server from a cluster.

  4. Click Remove from Cluster.

  5. Click Apply Changes.

  6. Shut down and restart every server in the cluster, including the server you just removed. For changes to apply across the cluster, you must restart every machine, so as to reload the memory on each machine with the cluster configuration changes. If at least one machine has a different cluster configuration loaded into memory than the other machines in the cluster, the new settings will not take effect and data synchronization will not work properly.
Changing Sync Server Priority
To assign a new Sync Server priority to a server that is in a cluster, follow these steps.

  1. Open the Configuration tool of the Netscape Application Server Administrator.

  2. Click the Cluster Settings tab.

    3. A list of registered servers is displayed on the left, and another list of servers, sorted by priority in a cluster, is displayed on the right.

    Note that if a server within a cluster is not registered with your Netscape Application Server Administrator, it appears in the priority list on the right as an IP address - port number pair. A registered server appears as a registered server name followed by a host name - port number pair. This is an example of as unregistered server appearing in the list of servers within a cluster:

    204.29.187.97:10818

    204.29.187.97 is the IP address of the unregistered server. 10818 is the port number to the Executive Server (KXS).

    This is an example of a registered server appearing in the list of servers within a cluster:

    NAS1 (machine1.mcom.com:10818)

    NAS1 is the name of the registered server, machine1.com.com is the host name of the server, and 10817 is the port number to the Administrative Server (KAS).

  3. On the All Registered Servers list, click a server that is a member of the cluster whose Sync Server priority you want to change.

  4. On the list of servers sorted by priority in a cluster, click the name of the server whose Sync Server priority you want to change.

    5. You can change Sync Server priority order only for a registered server that belongs to a cluster. A server that is not a member of a cluster, hence not participating in data synchronization, is listed under Default, in the cluster list on the right.

  5. Click one of the following:

    6. Click as many times as you want to increase or decrease the priority. For example, if a server has a Sync Server priority of third in line to take over for the Sync Primary, clicking Increase once changes the priority from third to second. Two clicks changes it from third to first.

  6. If you decide you want to undo the change you just made, click Reset to Previous.

  7. When you finish reassigning priorities, click Apply Changes.

  8. Restart every server in the cluster, including the one whose priority you just changed. For changes in Sync Server priority to apply across a cluster, you must restart every machine so that they are all aware of their new priority sequence, relative to one another.
Modifying the Maximum Number of Sync Backups
To change the maximum number of Sync Backups allowed during a cluster session, follow these steps.

  1. Open the Configuration tool of the Netscape Application Server Administrator.

  2. Click the Cluster Settings tab.

  3. In the All Registered Servers list, click the name of a server that is a member of the cluster you want to modify.

  4. Enter the maximum number of Sync Backups allowed during a single cluster session in "Maximum Number of Sync Backups.

  5. Restart every server in the cluster. For changes to apply across a cluster, you must restart every machine so that they are all aware of the change in the maximum number of Sync Backups allowed.
 

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