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Administering
Learn how to administer the product.
Administering DevOps Code ClearCase®
Learn about performing administrative tasks for a DevOps Code ClearCase® community including managing software licenses, user and group accounts, ClearCase server and client hosts, shared data, and the network that connects them.
Periodic maintenance
Periodic attention to storage management and repository integrity is an important administrative function. These topics describe VOB and view storage management tasks, the checkvob utility, and the DevOps Code ClearCase® scheduler, which you can use to automate many periodic maintenance chores.
About checkvob
VOBs have complex internal and external relationships that can sometimes be disrupted by system or network failures or when a VOB is restored from backup. checkvob is a cleartool subcommand that can find, and in many cases fix, a variety of problems in these relationships.
Using checkvob to find and fix internal VOB inconsistencies
A VOB storage directory contains a VOB database and a number of storage pools. Any operation that modifies VOB data makes changes to the database and at least one pool. When inconsistencies arise between the contents of a VOB database and the contents of its pools, VOB data integrity may be damaged.

Using checkvob to find and fix internal VOB inconsistencies

A VOB storage directory contains a VOB database and a number of storage pools. Any operation that modifies VOB data makes changes to the database and at least one pool. When inconsistencies arise between the contents of a VOB database and the contents of its pools, VOB data integrity may be damaged.

There are two main causes of inconsistencies between a VOB's database and pools:

A VOB is restored from a backup that backed up the database and the pools at different times. Backups made with the vob_snapshot utility fall into this category. In the most common case, the pools are backed up after the database, and may contain data that the database does not reference.
A system or network failure prevents a DevOps Code ClearCase® operation from completing properly, which can leave unreferenced data containers in the pools.

For more information, see the checkvob reference page.