| online redo logs [message #155821] |
Wed, 18 January 2006 16:23  |
siznad
Messages: 2
Registered: January 2006
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Junior Member |
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I'm new to Oracle, so forgive me if this is a stupid question.
I'm learning about backup, recovery, etc. I'm trying to understand the concept of redo log files. I understand they can be used with a database backup to recover a damaged database. I have read that there are online redo logs and archived redo logs. Archived redo logs I understand because I can see them on the disk. Online redo logs I do not get.
Are the online redo logs something stored in memory? If so, how can a database be recovered if a system crashes and everything in memory is lost.
I would appreciate any clarification.
Thanks.
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