The DB2® High Availability
Feature enables
integration between IBM® DB2 server and cluster managing
software.
When you stop a database manager instance in
a clustered environment, you must make your cluster manager aware
that the instance is stopped. If the cluster manager is not aware
that the instance is stopped, the cluster manager might attempt an
operation such as failover on the stopped instance. The DB2 High Availability
Feature provides
infrastructure for enabling the database manager to communicate with
your cluster manager when instance configuration changes, such as
stopping a database manager instance, require cluster changes.
If the database manager communicates with the cluster manager
whenever instance changes require cluster changes, then you are freed
from having to perform separate cluster operations after performing
instance configuration changes.
The
DB2 High Availability
Feature is
composed of the following elements:
- IBM Tivoli® System
Automation for Multiplatforms (SA MP) is
bundled with DB2 server on AIX® and Linux as part of the DB2 High Availability
Feature,
and integrated with the DB2 installer.
You can install, upgrade, or uninstall SA MP using
either the DB2 installer or
the installSAM and uninstallSAM scripts
that are included in the DB2 server
install media.
- In a clustered environment, some database
manager instance configuration and administration operations require
related cluster configuration changes. The DB2 High Availability
Feature (HA)
Feature enables the database manager to automatically request cluster
manager configuration changes whenever you perform certain database
manager instance configuration and administration operations. See: Configuring a cluster automatically with the DB2 High Availability (HA) Feature
- DB2 high
availability instance configuration utility (db2haicu) is a text-based
utility that you can use to configure and administer your highly available
databases in a clustered environment. See: DB2 high availability instance configuration utility (db2haicu)