HP Serviceguard Extended Distance Cluster for Linux A.01.00 Release Notes, Second Edition, May 2008

HP Serviceguard Extended Distance Cluster for Linux Release Notes
Compatibility Information and Installation Requirements
Chapter 1 11
# rpm -qa | grep xdc
In the output, the product name, xdc -A.01.00-0 will be listed. The
presence of this file verifies that the installation is successful.
Support for a 4-Node Cluster
XDC now supports a 4-node extended distance cluster for Linux. In this
cluster configuration, 2 nodes are at one site, while the other 2 nodes
form the other site. These sites are geographically dispersed. To ensure
that a package is capable of running on 4 nodes and that the data is
replicated, you must specify an order of failover for a package in the
package configuration file. The package configuration file contains an
ordered list of nodes on which the package needs to run. This order of
nodes is specified using NODE_NAME parameter.
While specifying the order of nodes in the package configuration file,
ensure that every node in one site is followed by a node of the other site.
In other words, you must ensure that the first node and the second
adoptive node for a package are in different sites. Similarly, the second
node and the third adoptive node must be in different sites. The third
and the fourth adoptive nodes must also be in different sites. With this