This article describes how many PGP Universal Servers can be used in a PGP Universal Server cluster.
When you have two or more PGP Universal Servers operating in your organization, you can configure them to synchronize with each other; this arrangement is called a Cluster.
A PGP Universal Server cluster operates in a ring topology and as a result we limit the number of cluster nodes to avoid the higher risk of more nodes causing a cluster not to perform.
While it is possible to create an unlimited number of servers in a cluster, Symantec strongly recommends limiting cluster members to 6.
With the current PGP Universal Server clustering architecture, this allows servers to work optimally and perform replication of data between the servers.
Clustering more than 6 PGP Universal Servers will have a greater risk of having replication lag and inconsistent clustering data.
|Note: PGP Corporation recommends that all members of a cluster use the same version of the PGP Universal Server software. If you need to update from a previous version, see the PGP Universal Server Upgrade Guide.
If you are updating to any later version, it is good practice to remove your PGP Universal Servers from email and port traffic. Do not break the cluster. The cluster members are temporarily running different versions of the software, but they continue to share cluster data.