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Oracle in a Nutshell
book

Oracle in a Nutshell

by Rick Greenwald, David C. Kreines
December 2002
Intermediate to advanced content levelIntermediate to advanced
928 pages
85h 29m
English
O'Reilly Media, Inc.
Content preview from Oracle in a Nutshell

Multiplexing redo log files

Oracle uses specific terminology in describing the management of redo logs. Each Oracle instance records the changes it makes to the database in redo logs. You can have one or more redo logs, referred to as redo log members, in a redo log group.

Logically, you can think of a redo log group as a single redo log file. However, Oracle allows you to specify multiple copies of a redo log to protect the log against media failure. Multiple copies of the same log are grouped together in a redo log group. All redo log groups for an instance are referred to as a redo thread.

There are ways you can rebuild the static part of the control file if you lose it, but there is no way to reproduce a lost redo log file; be sure that you have multiple copies of the redo file.

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Publisher Resources

ISBN: 0596003366Errata Page