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1 redo phase
The phase during recovery that applies (rolls forward) logged changes to a database to bring the data forward in time. -
2 restore
"A multi-phase process that copies all the data and log pages from a specified backup to a specified database (the data-copy phase) and rolls forward all the transactions that are logged in the backup (the redo phase). At this point, by default, a restore rolls back any incomplete transactions (the undo phase), which completes the recovery of the database and makes it available to users." -
3 restore sequence
"A sequence of one or more restore commands that, typically, initializes the contents of the database, files, and/or pages being restored (the data-copy phase), rolls forward logged transactions (the redo phase), and rolls back uncommitted transactions (the undo phase)." -
4 deferred transaction
A transaction that is not committed when the roll forward phase of recovery completes and that cannot be rolled back during database startup because data needed by roll back is offline. This data can reside in either a page or a file. -
5 redo
The phase during recovery that applies (rolls forward) logged changes to a database to bring the data forward in time.
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