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Tutarticle | Technical help for Oracle, Linux, Networking, Databases - Part 2

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Redo Log Files in Oracle


Redo log files help Oracle ensure that the effects of a user’s transaction are durable even if there is a computer failure. Before any data in the data files is changed, the log writer (LGWR) process stores a copy of the old data (undo information) and the new data (redo information) in the redo log file. In the event of a computer failure, the redo log files enable Oracle to undo the effects of incomplete transactions (uncommitted transactions) and verify

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