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

Using this Version
For support information see “Compatibility with Serviceguard Versions” (page 12);
for instructions see “Configuring and Running the Quorum Server” (page 19).
Getting the Software
You can obtain Quorum Server free from HP’s software web site:
http://software.hp.com -> High Availability -> ServiceGuard
Quorum Server
The version of the software you download is determined by the operating system you
specify on the download page.
Documentation for This Version
These release notes are shipped with Quorum Server Version A.04.00, and published
under Quorum Server at http://docs.hp.com -> High Availability.
Updated versions are published on that site as they become available.
See also the white paper Arbitration for Data Integrity in Serviceguard Clusters, under
Quorum Server at http://docs.hp.com -> High Availability.
Further Information
The most recent versions of user’s guides, release notes, and white papers about
Serviceguard and related topics are available at http://docs.hp.com -> High
Availability.
Support information, including current information about patches and known problems,
is available from the Hewlett-Packard IT Resource Center:
http://itrc.hp.com (Americas and Asia Pacific) or http://
europe.itrc.hp.com (Europe)
What Is the Quorum Server?
Serviceguard cluster products are specialized facilities for protecting mission-critical
applications from a wide variety of hardware and software failures. The HP
Serviceguard Quorum Server provides arbitration services for Serviceguard clusters
when a cluster partition is discovered: should equal-sized groups of nodes become
separated from each other, the Quorum Server allows one group to achieve quorum
and form the cluster, while the other group is denied quorum and cannot start a cluster.
See “How the Quorum Server Works” (page 10).
How the Quorum Server Works
The Quorum Server runs on an HP-UX or Linux system outside of the cluster for which
it is providing quorum services.
10 HP Serviceguard Quorum Server Version A.04.00 Release Notes