The following should be considered before operating the LifeKeeper for Linux DB2 Recovery Kit in the single partition or workgroup environment:
- LifeKeeper requires the location of the DB2 instance home directory as well as associated databases, tablespaces, and resources be stored on shared drives. Replicated (SIOS DataKeeper) file system resources must be created before creating the DB2 resource. The shared drives are automatically protected at the time the hierarchy is created. During creation of the DB2 resource hierarchy, the DB2 database manager is created as the parent resource while the shared file systems containing instance home directories and actual databases are created as dependent resources. Consequently, if after the creation of your DB2 hierarchy you decide to create a database on a shared file system that is not protected by LifeKeeper, you will need to create a resource hierarchy for that file system and make it a dependency of your DB2 resource hierarchy.
- When the database manager becomes inoperable on the primary system, the service fails over to a previously defined backup system. The database service on the backup system becomes available immediately after the dependent resources fail over and the database manager is brought into service. Previously connected DB2 clients are disconnected and must reconnect to the functioning server. Any uncommitted SQL statements are rolled back and should be re-entered.
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