Fast recovery is an automatic procedure that restores the database server to a consistent state after it goes offline under uncontrolled conditions. Fast recovery also rolls forward all committed transactions since the last checkpoint and rolls back any uncommitted transactions.
When the database server starts up, it checks the physical log, which contains pages that have not yet been written to disk. If the physical log is empty, the database server was shut down in a controlled fashion. If the physical log is not empty, the database server automatically performs fast recovery.
For information about fast recovery, see the IBM Informix Administrator's Guide.
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