Parallel to other activities, back-up copies of the CMDB should be taken regularly and securely stored. The frequency of copying
will be dependent on the implemented Changes. The more often Changes are implemented in the Configuration Management Database
(CMDB), the more often back-ups should be taken.
Historical records of CIs are stored in archives. The amount of historical information to be retained depends on its usefulness
to the organisation.
When Configuration Management has been operating for a period of time, regular housekeeping should be carried out to ensure
that redundant CI records are systematically deleted.