A database's ability to recover from disasters is called a roll forward The database reads the transaction log and re-executes all of the readable and complete transactions
If an error occurs in processing transactions,the database can be restarted and loaded from a known heckpoint Then partially completed transactions can be rolled forward to record the interrupted hanges
A database's ability to recover from disasters is called a roll forward The database reads the transaction log and reexecutes all of the readable and complete transactions
A process whereby one option position is closed and a new one with a later expiration date is established If the new position also involves a lower exercise price, it is called a "roll-down and forward" If it involves a higher exercised price, it is called a "roll-up and forward"