Managing Serviceguard A.11.20, March 2013

NODE STATUS STATE
node1 up running
node2 up running
node3 up running
node4 up running
MULTI_NODE_PACKAGES
PACKAGE STATUS STATE AUTO_RUN SYSTEM
SG-CFS-pkg up running enabled yes
cfspkg1 up running enabled no
bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 24215552 20954099 3058098 87% /
/dev/vg00/lvol1 2031616 365773 1561780 19% /stand
/dev/odm 0 0 0 0% /dev/odm
/dev/vx/dsk/cvm_dg1_node1/lvol1 167808 5313 152346 3% /mnt2
Parallel Activation of Disk Groups and Parallel Mounting of Mount Points
To enable parallel activation of CVM disk groups and parallel mounting of CFS mount points, you
must set the following parameters in the package configuration file:
• cvm_concurrent_dg_operations
Specify the number of concurrent disk groups to be activated in parallel during package
startup. The default value is 1. Setting this value to an appropriate number improves
performance when the package needs to activate a large number of disk groups, since the
disk groups are activated in parallel thus consuming lesser time. For example, if a package
uses three disk groups that need to be activated in parallel, you must enter the following in
the package configuration file:
cvm_concurrent_dg_operations 3
• cfs_concurrent_mount_unmount_operations
Specify the number of concurrent mount operations to allow during package startup. The
default value is 1. Setting this value to an appropriate number improves performance when
the package needs to mount a number of mount points in parallel. For example, if a package
uses three disk groups on which the file systems need to be mounted in parallel, you must
enter the following in the package configuration file:
cfs_concurrent_mount_unmount_operations 3
IMPORTANT: It is recommended to increment the parameter values in smaller numbers and
monitor the effect on performance at each level. As soon as the performance starts to decline, stop
increasing and reset it to a lower level. However, you must consider the factors like the number of
CPUs, the amount of available memory, the HP-UX kernel settings, and the number and
characteristics of other packages that will be running on the node.
NOTE: Serviceguard does not support parallel deactivation of disk groups and parallel unmounting
of mount points. These operations are done serially.
Creating Modular Checkpoint and Snapshot Packages for CFS
Mount Point Packages for Storage Checkpoint using Modular Style Packages
The following example illustrates how to create a storage checkpoint:
212 Building an HA Cluster Configuration