Recommended CP server configurations

Last published : Jun 11, 2026
Following are the recommended CP server configurations:
  • Multiple application clusters use three CP servers as their coordination points
See Figure: Three CP servers connecting to multiple application clusters.
  • Multiple application clusters use a single CP server and single or multiple pairs of coordinator disks (two) as their coordination points
See Figure: Single CP server with two coordinator disks for each application cluster.
  • Multiple application clusters use a single CP server as their coordination point
This single coordination point fencing configuration must use a highly available CP server that is configured on an SFHA cluster as its coordination point.
See Figure: Single CP server connecting to multiple application clusters.
Warning: In a single CP server fencing configuration, arbitration facility is not available during a failover of the CP server in the SFHA cluster. So, if a network partition occurs on any application cluster during the CP server failover, the application cluster is brought down.
Although the recommended CP server configurations use three coordination points, you can use more than three coordination points for I/O fencing. Ensure that the total number of coordination points you use is an odd number. In a configuration where multiple application clusters share a common set of CP server coordination points, the application cluster as well as the CP server use a Universally Unique Identifier (UUID) to uniquely identify an application cluster.
Figure: Three CP servers connecting to multiple application clusters displays a configuration using three CP servers that are connected to multiple application clusters.
Figure: Three CP servers connecting to multiple application clusters
Three CP servers connecting to multiple application clusters
Figure: Single CP server with two coordinator disks for each application cluster displays a configuration using a single CP server that is connected to multiple application clusters with each application cluster also using two coordinator disks.
Figure: Single CP server with two coordinator disks for each application cluster
Single CP server with two coordinator disks for each application cluster
Figure: Single CP server connecting to multiple application clusters displays a configuration using a single CP server that is connected to multiple application clusters.
Figure: Single CP server connecting to multiple application clusters
See Configuration diagrams for setting up server-based I/O fencing.