About the circular logging setting for Exchange

Article:HOWTO24123  |  Created: 2010-01-01  |  Updated: 2011-06-02  |  Article URL http://www.symantec.com/docs/HOWTO24123
Article Type
How To


Subject


About the circular logging setting for Exchange

When circular logging is enabled, you cannot run incremental and differential backups of Exchange databases and storage groups, or run backup jobs for which continuous protection is enabled. These types of backups rely on a complete history of logs.

When circular logging is enabled, transaction log files that have already been committed to the database are overwritten, preventing the accumulation of logs. The log files are overwritten whether or not a full or incremental backup has been run, and a history of previous logs since the last full or incremental backup is not maintained.

When circular logging is disabled, transaction log files accumulate on the disk until the following occurs:

  • A full or incremental backup is performed.

  • A recovery point is run as part of a continuous backup of Exchange.

After these operations, the log files that have all transactions committed to the database are deleted.

See Backup strategies for Exchange


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id-SF700153171_be2010_adm


Article URL http://www.symantec.com/docs/HOWTO24123


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