Thursday, September 26, 2013

Analogy: Restore & Recovery to bone fracture

 

Restore and recovery are analogous to the healing process when you break a bone.

Restoring is similar to the process of setting the broken bone back to its original position.
This is like restoring the datafiles from a backup and placing them in their original locations.

Recovering a datafile is similar to the healing process that recovers the bone back to its state before it was broken.
When you recover your datafiles, you apply transactions (stored in the redo files) to get the datafiles back to the state they were in before the media failure took place.

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