Managing Serviceguard Fifteenth Edition, reprinted May 2008

Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5258
Filesystem kbytes used avail %used Mounted on
/dev/vx/dsk/logdata/log_files 10485 17338 966793 2% tmp/logdata/log_files
ftsys10/etc/cmcluster/cfs> bdf
Filesystem kbytes used avail %used Mounted on
/dev/vx/dsk/logdata/log_files 10485 17338 966793 2% tmp/logdata/log_files
6. To view the package name that is monitoring a mount point, use the
cfsmntadm show_package command:
cfsmntadm show_package /tmp/logdata/log_files
SG-CFS-MP-1
7. After creating your mount point packages for the cluster file system,
you can configure your application package to depend on the mount
points. In the configuration file, specify the dependency triplet,
setting dependency_condition to SG-mp-pkg-#=UP and
dependency_location to SAME_NODE. For more information about
these parameters, see “Package Parameter Explanations” on
page 287.
NOTE Unlike LVM volume groups, CVM disk groups are not entered in the
cluster configuration file; they are entered in the package
configuration file only.
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 The Veritas File
System provides a unique storage checkpoint facility which quickly
creates a persistent image of a filesystem at an exact point in time.
Storage checkpoints significantly reduce I/O overhead by identifying and
maintaining only the filesystem 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
filesystem.