HP Serviceguard Quorum Server Version A.04.00 Release Notes, March 2009

Within the restrictions specified under “System Requirements” (page 11), a Quorum
Server running on either a Linux or an HP-UX system can serve a Serviceguard for
Linux cluster, an HP-UX Serviceguard cluster, or a combination of clusters of both
types.
The Quorum Server uses TCP/IP, and listens to connection requests from the
Serviceguard nodes on port # 1238. The server maintains a special area in memory for
each cluster; when a node obtains the cluster lock, this area is marked so that other
nodes will recognize the lock as “taken.”
You can make the Quorum Server highly available by configuring it as a Serviceguard
package, so long as the package runs outside the cluster the Quorum Server serves;
see “Creating a Package for the Quorum Server” (page 19).
You can also configure any two Serviceguard clusters to provide quorum services for
each other; for more information see the white paper, Cross-cluster Quorum Server
Configurations at docs.hp.com -> High Availability -> Quorum Server.
If the Quorum Server is not available or reachable, it will not adversely affect any
clusters using it, unless a cluster needs to reform and requires the Quorum Server’s
arbitration to do so.
As of Serviceguard A.11.19, you can change from one quorum server to another, or to
or from another quorum method, while the cluster is running.
IMPORTANT: For more information, see “What Happens when You Change the
Quorum Configuration Online” in Chapter 3 of Managing Serviceguard.
System Requirements and Recommendations
System Requirements
Operating System and Hardware Requirements
The HP-UX version of Quorum Server version A.04.00 runs on HP 9000 servers, HP
Integrity servers, and HP-UX workstations, running HP-UX 11i v2 or 11i v3.
The Linux version runs on:
• Any hardware specified in the HP Serviceguard for Linux Certification Matrix (which
you can find at: http://www.hp.com/info/sglx) and running one of the
following Linux distributions in IA32, IA64, or x86_64 versions:
— Red Hat 5
— SUSE SLES10
• Any HP PC supported to run any of the operating systems indicated by the previous
bullet.
System Requirements and Recommendations 11