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Logical Log

To keep a history of database and database server changes since the time of the last storage-space backup, the database server generates and stores log records. The database server stores the log records in the logical log, which is made up of logical-log files. The log is called logical because the log records represent units of work related to the logical operations of the database server, as opposed to physical operations. At any time, the combination of a storage-space backup plus logical-log backup contains a complete copy of your database server data.

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