Guidelines for Using Clusters

Following these guidelines for configuring groups of Proxy Servers into clusters:

• All servers to be included in a particular cluster must be installed prior to creating any clusters.

• All servers in a cluster must be the same type (UNIX or Windows). Clusters must be homogenous.

• All servers in a cluster must be Proxy Server version 4. Only Proxy Server version 4 servers are supported for addition to clusters.

• All Administration Servers must use the same protocol, HTTP or HTTPS. If you change the protocol of one Administration Server in a cluster, you must change the protocols for all Administration Servers. For more information, see Modifying Server Information.

• All cluster-specific Administration Servers must have the same user name and password as the master Administration Server. Distributed administration can be used to configure multiple administrators on each Administration Server.

• One cluster-specific Administration Server must be designated as the master Administration Server, which server you choose does not matter.

• The master Administration Server must have access to each cluster-specific Administration Server. The master Administration Server retrieves information about all installed Proxy Servers.