Managing HP Serviceguard A.12.00.00 for Linux, June 2014

• Can support a cluster with any supported number of nodes.
• Can communicate with the cluster on up to two subnets (a primary and an alternate).
IMPORTANT: If you plan to use a Quorum Server, make sure you read the HP Serviceguard
Quorum Server Version A.04.00 Release Notes before you proceed. You can find them at http://
www.hp.com/go/linux-serviceguard-docs (Select HP Serviceguard Quorum Server Software). You
should also consult the Quorum Server white papers at the same location.
4.5.3.1 Quorum Server Worksheet
You can use the Quorum Server Worksheet (page 300) to identify a quorum server for use with one
or more clusters. You may want to record the following:
Quorum Server Host The host name for the quorum server.
IP Address The IP address(es) by which the quorum server will communicate
with the cluster nodes.
Supported Node Names The name (39 characters or fewer) of each cluster node that will
be supported by this quorum server. These entries will be entered
into qs_authfile on the system that is running the quorum server
process.
4.6 Volume Manager Planning
When designing your disk layout using LVM or VxVM, you must consider the following:
• The volume groups that contain high availability applications, services, or data must be on a
bus or buses available to the primary node and all adoptive nodes.
• High availability applications, services, and data should be placed in volume groups that are
separate from non-high availability applications, services, and data.
• You must group high availability applications, services, and data, whose control needs to be
transferred together, on a single volume group or a series of volume groups.
• You must not group two different high availability applications, services, or data, whose control
needs to be transferred independently, on the same volume group.
• Your root disk must not belong to a volume group that can be activated on another node.
4.6.1 Volume Groups and Physical Volume Worksheet
You can organize and record your physical disk configuration by identifying which physical disks,
LUNs, or disk array groups will be used in building each volume group for use with high availability
applications. Use the Volume Group and Physical Volume worksheet (page 300).
NOTE: HP recommends that you use volume group names other than the default volume group
names (vg01, vg02, etc.). Choosing volume group names that represent the high availability
applications they are associated with (For example, /dev/vgdatabase) will simplify cluster
administration.
4.7 VxVM Planning
You can create storage groups using the LVM (Logical Volume Manager, described in the previous
section) or using Veritas VxVM software.
4.6 Volume Manager Planning 83