Managing Serviceguard A.11.20, March 2013

SG-CFS-MP-1
7. After creating the mount point packages for the cluster file system, configure your application
package to depend on the mount points. In the configuration file, configure a dependency,
setting dependency_condition to SG-CFS-MP-pkg-# =UP and dependency_location
to SAME_NODE. For more information about these parameters, see “Package Parameter
Explanations” (page 237).
Creating Checkpoint and Snapshot Packages for CFS
The storage checkpoints and snapshots are two additional mount point package types. They can
be associated with the cluster via the cfsmntadm(1m) command.
Mount Point Packages for Storage Checkpoints using Legacy Style Packages
The Veritas File System provides a unique storage checkpoint facility which quickly creates a
persistent image of a file system at an exact point in time. Storage checkpoints significantly reduce
I/O overhead by identifying and maintaining only the file system blocks that have changed since
the last storage checkpoint or backup. This is done by a copy-on-write technique. Unlike a disk-based
mirroring technology, which requires a separate storage space, this Veritas technology minimizes
the use of disk space by creating a storage checkpoint within the same free space available to the
file system.
For more information about the technique, see the Veritas File System Administrator’s Guide
appropriate to your version of CFS, posted at http://www.hp.com/go/hpux-core-docs -> HP-UX
11i Volume Management (LVM/VxVM) Software.
The following example illustrates how to create a storage checkpoint of the /cfs/mnt2 file system.
Start with a cluster-mounted file system.
1. Create a checkpoint of /tmp/logdata/log_files named check2. It is recommended
that the file system already be part of a mount point package that is mounted.
cfsmntadm display
Cluster Configuration for Node: ftsys9
MOUNT POINT TYPE SHARED VOLUME DISK GROUP STATUS
/tmp/logdata/log_files regular log_files logdata MOUNTED
Cluster Configuration for Node: ftsys10
MOUNT POINT TYPE SHARED VOLUME DISK GROUP STATUS
/tmp/logdata/log_files regular log_files logdata MOUNTED
fsckptadm -n create check2 /tmp/logdata/log_files
2. Associate it with the cluster and mount it.
cfsmntadm add ckpt check2 /tmp/logdata/log_files \
/tmp/check_logfiles all=rw
Package name "SG-CFS-CK-2" was generated to control the resource
Mount point "/tmp/check_logfiles" was associated to the cluster
cfsmount /tmp/check_logfiles
3. Verify:
cmviewcl
CLUSTER STATUS
cfs-cluster up
NODE STATUS STATE
ftsys9 up running
ftsys10 up running
MULTI_NODE_PACKAGES
PACKAGE STATUS STATE AUTO_RUN SYSTEM
222 Building an HA Cluster Configuration