1.

A transaction commits as soon as its commit log record is written to stable storage at the primary and the backup site. This is(a) One Safe(b) Two Safe(c) Two-very Safe(d) Very SafeI have been asked this question during an online exam.The doubt is from Remote Backup Systems in division Recovery System of Database Management

Answer»

Right answer is (c) Two-very Safe

Easiest EXPLANATION - The problem with this SCHEME is that transaction processing cannot PROCEED if EITHER the primary or the BACKUP site is down.



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