Managing Serviceguard 14th Edition, June 2007

Planning and Documenting an HA Cluster
LVM Planning
Chapter 4148
LVM Planning
You can create storage groups using the HP-UX Logical Volume Manager
(LVM), or using Veritas VxVM software (and CVM if available) as
described in the next section.
When designing your disk layout using LVM, you should consider the
following:
• The root disk should belong to its own volume group.
• The volume groups that contain high availability applications,
services, or data must be on a bus or busses available to the primary
node and all adoptive nodes.
• High availability applications, services, and data should be placed in
a separate volume group from non-high availability applications,
services, and data.
• You must group high availability applications, services, and data,
whose control needs to be transferred together, onto a single volume
group or series of volume groups.
• You must not group two different high availability applications,
services, or data, whose control needs to be transferred
independently, onto the same volume group.
• Your root disk must not belong to a volume group that can be
activated on another node.
• It is recommended 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 that
they are associated with (for example, /dev/vegetables will
simplify cluster administration).
If you plan to use the EMS HA Disk Monitor, refer to the section on
“Rules for Using EMS Disk Monitor with Serviceguard” in the manual
Using High Availability Monitors (B5736-90046).