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The simplest way of transferring control is for the old primary to receive __________ from the old backup site
The time to process the remote backup can be reduced by
A _______________ configuration can make takeover by the backup site almost instantaneous
A transaction commits as soon as its commit log record is written to stable storage at the primary site. This is
A transaction commits as soon as its commit log record is written to stable storage at the primary and the backup site.This is
If only the primary is active, the transaction is allowed to commit as soon as its commit log record is written to stable storage at the primary site. This is
Once the lower-level lock is released, the operation cannot be undone by using the old values of updated data items, and must instead be undone by executing a compensating operation; such an operation is called
Which of the following is used for undo operations alone ?
Redo operations are performed exclusively using
To perform logical redo or undo, the database state on disk must be operation ___________ that is, it should not have partial effects of any operation
An operation is said to be __________ if executing it several times in a row gives the same result as executing it once
Immediate database modification technique uses
Shadow paging has
For correct behavior during recovery, undo and redo operation must be
If ___________ are not obtained in undo operation it will cause problem in undo-phase
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