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Data Guard Architecture

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	Date/Time	Made By	Edit Note	Type	Scope
	Apr 1 2008, 9:13 AM EDT	dariusz@polanski.biz	On Maximum Availability mode primary database do not wait for commits on standby.	edit	22 words deleted
Change: Primary database changes are not committed until it has been confirmed that the data is available on at least one standby database.The standby database may temporarily lag behind, or diverge, from the primary database without View changes from previous version. (Word count: 607)
	Nov 26 2007, 11:12 PM EST	jonah.harris	Moved from: The Official Oracle Wiki	move	No content added or deleted.
Change: Moved by jonah.harris Nov 26 2007, 11:12 PM EST
	Nov 25 2007, 7:43 PM EST	girlgeek		edit	3 words deleted
Change: Oracle data guard Primary and standby databases (database roles) In a standby environment, one database is a primary database while all others are standby databases. Standby databases are either physical or logical standby databases. Query the database_role column in v$database in order to find out the role of a database View changes from previous version. (Word count: 629)
	Nov 25 2007, 7:42 PM EST	girlgeek	more appropriate to the content	rename	No content added or deleted.
Change: Renamed from Data Guard Usage by girlgeek Nov 25 2007, 7:42 PM EST for: more appropriate to the content
	Nov 25 2007, 7:31 PM EST	girlgeek	added image	edit	3 words added 6 words deleted 1 image added
Change: database.database. All the other databases are standby databases. Logical standby database The logical standby database is new with Oracle 9iR2. The key advantage for logical standby databases is that they're opened read/write, even while they're in applied mode. That View changes from previous version. (Word count: 632)
	Nov 25 2007, 7:28 PM EST	girlgeek	Initial entry - improvements welcomed	edit	624 words added
Change: Maximum availability provides the second highest level of data availability. As with its maximum reliability counterpart, redo data is synchronously transmitted from the primary database View changes from previous version. (Word count: 632)
	Nov 25 2007, 10:17 AM EST	girlgeek		create	No content added or deleted.
Change: Created by girlgeek Nov 25 2007, 10:17 AM EST for: no reason given

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