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Cisco Bug: CSCsz36845 - DHCP server should detect if shadow backup active and reduce DB activity

Last Modified

May 07, 2010

Products (1)

  • Cisco Network Registrar

Known Affected Releases

6.3(2.1) 7.0(1) 7.1

Description (partial)


Shadow backups (either the nightly or explicitly requested) may fail when the servers are very active.


In order for a shadow backup of a databases to be valid, no DB log files can be purged or added. Thus, for a large database it is possible that the backup may take long enough for either the database log files to have been purged or a new one created. While it is not possible for the server to stop all of its disk I/O, it can suspend DB log file purges and non-essential disk writes (such as lease history trimming). Doing so would reduce the changes that a backup would not be valid and have to be retried (and eventually fail).
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