Restoring one or more members of a set of related databases

You must consider the relationships among VOBs when backing them up and, especially, when restoring them.

As described in Backing up related databases together, database relationships are most complex in a UCM environment, in which dozens of VOBs are connected by cross-VOB hyperlinks of various kinds. Whenever one or more of these databases is restored from backup, skew (inconsistencies) between databases is a likely result.

This section describes several situations in which skew is introduced when a member of a set of related databases is restored from backup. These situations apply only to UCM environments:
  • A component VOB is restored from backup.
  • A PVOB is restored from backup.
This topic also describes some more general considerations for environments that have administrative VOB hierarchies but do not use UCM.
Note: Many of the procedures described in this section use the cleartool checkvob –ucm command. For more information, see the checkvob reference page.