Managing Serviceguard Nineteenth Edition, Reprinted June 2011

only if you use a Quorum Server and want to specify an
address on an alternate subnet by which it can be reached.
The alternate subnet need not use the same address family
as QS_HOST if HOSTNAME_ADDRESS_FAMILY is set to
ANY. For more information, see “Using a Quorum Server”
(page 95) and “Specifying a Quorum Server” (page 180).
IMPORTANT: For special instructions that may apply to
your version of Serviceguard and the Quorum Server see
“Configuring Serviceguard to Use the Quorum Server” in
the latest version HP Serviceguard Quorum Server Version
A.04.00 Release Notes, at http://www.hp.com/go/
hpux-serviceguard-docs under HP Serviceguard
Quorum Server Software.
See also “About Hostname Address Families: IPv4-Only,
IPv6-Only, and Mixed Mode” (page 102) for important
information about requirements and restrictions in an
IPv6–only cluster.
Can be changed while the cluster is running; see “What
Happens when You Change the Quorum Configuration
Online” (page 47) for important information.
QS_POLLING_INTERVAL The time (in microseconds) between attempts to contact the
Quorum Server to make sure it is running. Default is
300,000,000 microseconds (5 minutes). Minimum is
10,000,000 (10 seconds). Maximum is 2,147,483,647
(approximately 35 minutes).
Can be changed while the cluster is running; see “What
Happens when You Change the Quorum Configuration
Online” (page 47) for important information.
QS_TIMEOUT_EXTENSION Optional parameter used to increase the time (in
microseconds) to wait for a quorum server response.
The default quorum server timeout is calculated from the
Serviceguard cluster parameter MEMBER_TIMEOUT. For
clusters of two nodes, it is 0.1 * MEMBER_TIMEOUT; for
more than two nodes it is 0.2 * MEMBER_TIMEOUT.
You can use the QS_TIMEOUT_EXTENSION to increase the
time interval after which the current connection (or attempt
to connect) to the Quorum Server is deemed to have failed;
but do not do so until you have read the HP Serviceguard
Quorum Server Version A.04.00 Release Notes, and in
particular the following sections in that document: “About
the QS Polling Interval and Timeout Extension”, “Network
Recommendations”, and “Setting Quorum Server Parameters
in the Cluster Configuration File”.
Can be changed while the cluster is running; see “What
Happens when You Change the Quorum Configuration
Online” (page 47) for important information.
SITE_NAME The name of a site to which nodes (see NODE_NAME) belong.
Can be used only in a site-aware disaster-tolerant cluster,
which requires Metrocluster (additional HP software); see
Cluster Configuration Planning 107