HP Serviceguard Enterprise Cluster Master Toolkit User Guide (5900-2145, April 2013)

Storage considerations
Unless otherwise stated, this toolkit supports all the file systems, storage, and volume managers
that Serviceguard supports, including CFS.
Supported configuration
Providing high availability to the EnterpriseDB PPAS instance
This configuration provides an automatic failover of the EnterpriseDB PPAS toolkit package to the
adoptive node.
Figure 8 High availability to the EnterpriseDB PPAS instance
In Figure 8, the EDB is configured in a volume group shared between Node1, and Node2. EDB
is packaged using the HP Serviceguard Toolkit for EnterpriseDB PPAS. The primary package is
configured to run either on Node1 or on Node2, and is currently running on Node1. If the primary
package fails on Node1, it fails over to Node2. vglock is used as the cluster lock volume group,
and vgdata is used to keep the shared data for EDB. This vg is configured on the shared disks,
which can be accessed by both Node1 and Node2. The EDB binaries are placed on the local file
system of Node1 and Node2.
When an EDB instance, running on the primary node fails, or when the primary node, hosting the
EDB instance crashes, the EDB package fails over to the adoptive node without any user intervention.
The shared data required for EDB is placed on the shared storage, therefore, the EDB instance
running on the other node must access the same data that was being accessed by the primary
node.
The advantage of placing the EDB binaries on the local disk is that, when the EDB instance or the
node hosting the EDB instance fails, the adoptive node has its own EDB binary which is required
to start the EDB instance on the adoptive node.
Supported configuration 137