Using Serviceguard Extension for RAC, 10th Edition, April 2013

NOTE: The above mentioned steps are the mandatory prerequisite steps to be performed before
you configure SGeRAC toolkit for CRS, ASMDG (if storage is ASM/SLVM), and RAC MNP’s.
Support for invocation of Oracle Clusterware commands from customer-developed scripts
This includes invocation of such commands from SGeRAC package control scripts or module scripts;
therefore, SGeRAC packages can invoke commands to start up and shutdown Oracle Clusterware
and/or RAC database instances.
With these improvements, it became possible, using SGeRAC packages, to meet the sequencing
requirements mentioned above for the startup and shutdown of Oracle Clusterware and RAC
database instances with respect to the SGeRAC-managed storage used by these entities.
Serviceguard/Serviceguard Extension for RAC multi-node packages and simple
package dependencies
The new features in SG/SGeRAC that enable the framework provided by are multi-node packages
(MNPs) and simple package dependencies.
Configuring an SGeRAC package via the PACKAGE_TYPE attribute to be of type MULTI-NODE
allows the package to run on more than one node at once. MNPs have the following features:
• Each instance of an MNP behaves as a normal package but does not failover.
• FAILOVER_POLICY and FAILBACK_POLICY configuration attributes cannot be specified
for an MNP.
• Relocatable IP addresses cannot be configured for MNPs.
• Failures of package components such as services, EMS resources or subnets, will cause the
MNP to be halted only on the node on which the failure occurred. Unlike failover packages,
when an instance of an MNP fails, only node switching is set to disabled, rather than the
global AUTO_RUN.
• SG/SGeRAC Package Manager commands have been enhanced to manage MNPs:
cmviewcl has been enhanced to show the overall package status as a summary of the
status of package instances. If not all the configured instances of an MNP are running,
◦
a qualifier is added to the STATUS field of the form (<running>/<configured>) where
<running> indicates the number of instances running and <configured> indicates
the total number of configured instances. The status of each instance can also be displayed.
◦ cmrunpkg/cmhaltpkg have been enhanced to allow multiple -n parameters to be
specified to indicate the nodes to which the command is to be applied. Using these
commands, the instances of the MNP can be started and stopped independently. MNPs
can be started automatically by setting AUTO_RUN to YES.
Simple package dependencies are used to describe the dependency relationship between packages.
To configure package A with a simple package dependency on package B, we set the following
three attributes of package A:
• DEPENDENCY_NAME: Each dependency must have a unique name within the package which
is used to identify it.
• DEPENDENCY_CONDITION: Expression describing what must be true for the dependency to
be satisfied. The syntax is: <package name> = UP, where <package name> is the package
being depended on (B in this case).
• DEPENDENCY_LOCATION: Describes where the condition must be satisfied. For SGeRAC, the
only possible value for this attribute is SAME_NODE.
104 SGeRAC Toolkit for Oracle RAC 10gR2 or later