HP Serviceguard Quorum Server for Linux Version A.12.00.00 Release Notes, March 2014

NOTE: The difference between Serviceguard A.11.19 and the earlier versions that support an
alternate-subnet connection is that in the earlier versions, the alternate connections are serialized;
if the first connection fails, the node will attempt to connect to the Quorum Server on the alternate
subnet. In A.11.19 the connections are created in parallel, improving availability: if one connection
fails, the other is still active.
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 12).
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
www.hp.com/go/hpux-serviceguard-docs -> HP Serviceguard Quorum Server
Software.
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 manual.
System requirements and recommendations
System requirements
Operating system and hardware requirements
The Linux version of Quorum Server version A.12.00.00 runs on:
• Any hardware specified in the HP Serviceguard for Linux Certification Matrix (which is available
at http://www.hp.com/info/sglx) and running the following Linux distributions in
x86_64 version:
◦ Red Hat Enterprise Linux 5
◦ Red Hat Enterprise Linux 6
◦ SUSE Linux Enterprise Server 11
NOTE: The HP Serviceguard Quorum Server for Linux version A.12.00.00 runs only on
previously mentioned x86_64 architecture.
• Any HP PC supported to run any of the operating systems indicated by the previous bullet.
CAUTION: Make sure that each cluster served by a given Quorum Server has a unique cluster
name. Serviceguard normally enforces this, but under some circumstances (for example if the
clusters are on different subnets) Serviceguard will not be able to detect a duplicate name. See
also “Network recommendations” (page 7).
Memory and disk requirements
Memory: 7.0 MB
Disk space: 1 MB
6 HP Serviceguard Quorum Server for Linux version A.12.00.00 Release Notes