Using Serviceguard Extension for RAC, 4th Edition, February 2007

Serviceguard Configuration for Oracle 9i RAC
Using Packages to Configure Startup and Shutdown of RAC Instances
Chapter 3 169
• Add service command(s)
• Add a service restart parameter, if desired.
NOTE Use care in defining service run commands. Each run command is
executed by the control script in the following way:
•The cmrunserv command executes each run command and then
monitors the process id of the process created by the run command.
• When the command started by cmrunserv exits, Serviceguard
determines that a failure has occurred and takes appropriate action,
which may include transferring the package to an adoptive node.
• If a run command is a shell script that runs some other command
and then exits, Serviceguard will consider this normal exit as a
failure.
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_OPERATIONS—defines 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.