Using Serviceguard Extension for RAC, 2nd Edition, February 2005 Update

Table Of Contents
Serviceguard Configuration for Oracle RAC
Using Packages to Configure Startup and Shutdown of RAC Instances
Chapter 2 65
To avoid problems in the execution of control scripts, ensure that each
run command is the name of an actual service and that its process
remains alive until the actual service stops.
If you need to define a set of run and halt operations in addition to the
defaults, create functions for them in the sections under the heading
CUSTOMER DEFINED FUNCTIONS.
Optimizing for Large Numbers of Storage Units
A set of four variables is provided to allow performance improvement
when employing a large number of filesystems or storage groups. For
more detail, see the comments in the control script template. They are:
CONCURRENT_VGCHANGE_OPERATIONSdefines a number of parallel
LVM volume group activations during package startup as well and
deactivations during package shutdown.
CONCURRENT_FSCK_OPERATIONS—defines a number of parallel fsck
operations that will be carried out at package startup.
CONCURRENT_MOUNT_AND_UMOUNT_OPERATIONS—defines a number of
parallel mount operations during package startup and unmount
operations during package shutdown.
Customizing the Control Script for RAC Instances
Use the package control script to perform the following:
Activation and deactivation of RAC volume groups.
Startup and shutdown of the RAC instance.
Monitoring of the RAC instance.
Set RAC environment variables in the package control script to define
the correct execution environment for RAC.
Enter the names of the LVM volume groups you wish to activate in
shared mode in the VG[] array. Use a different array element for each
RAC volume group. (Remember that RAC volume groups must also be
coded in the cluster configuration file using OPS_VOLUME_GROUP
parameters.) Be sure to specify shared activation with the vgchange
command by setting the VGCHANGE parameter as follows:
VGCHANGE="vgchange -a s”