Managing Serviceguard Eighteenth Edition, September 2010

1. The failover package’s applications should not run on a node unless the mount
point packages are already running.
In the package’s configuration file, you fill out the dependency parameter to specify
the requirement SG-CFS-MP-id# =UP on the SAME_NODE.
2. The mount point packages should not run unless the disk group packages are
running.
Create the mount point packages using the cfsmntadm and cfsmount commands.
Serviceguard names the mount point packages SG-CFS-MP-id#, automatically
incrementing their ID numbers. In their configuration files, Serviceguard specifies
the dependency on the disk group packages.
3. The disk group packages should not run unless the CFS system multi-node package
(SG-CFS-pkg) is running to manage the volumes.
Create the disk group packages with the cfsdgadm. command. Serviceguard
names them SG-CFS-DG-id#, automatically incrementing their ID number. In
their configuration files, Serviceguard specifies the dependency on the CFS system
multi-node package (SG-CFS-pkg).
CAUTION: Once you create the disk group and mount point packages, you must
administer the cluster with CFS commands, including cfsdgadm, cfsmntadm,
cfsmount, and cfsumount. You must not use the HP-UX mount or umount
command to provide or remove access to a shared file system in a CFS environment;
using these HP-UX commands under these circumstances is not supported. Use
cfsmount and cfsumount instead.
If you use the HP-UX mount and umount commands, serious problems could
occur, such as writing to the local file system instead of the cluster file system.
Non-CFS commands could cause conflicts with subsequent CFS command
operations on the file system or the Serviceguard packages, and will not create an
appropriate multi-node package, which means cluster packages will not be aware
of file system changes.
NOTE: The Disk Group (DG) and Mount Point (MP) multi-node packages
(SG-CFS-DG_ID# and SG-CFS-MP_ID#) do not monitor the health of the disk
group and mount point. They check that the application packages that depend on
them have access to the disk groups and mount points. If the dependent application
package loses access and cannot read and write to the disk, it will fail, but that will
not cause the DG or MP multi-node package to fail.
4. You create the CFS package, SG-CFS-pkg, with the cfscluster command. It is
a system multi-node package that regulates the volumes used by CVM 4.1 and
later. System multi-node packages cannot be dependent on any other package.
Package Configuration Planning 171