METHOD AND APPARATUS FOR INTERRUPTING UPDATES TO A DATABASE TO PROVIDE READ-ONLY ACCESS

摘要

A method and system for suspending log-based updating of a database in a manner that permits its resumption without restore, to permit efficient alternation between a log-based update mode and a database access mode. Unplayed log records are protected, as re versions of database pages at a time when the log-based update was suspended. This permits log-based updating to resume where it left off. In order to ensure consistent data for access, a roll-back procedure creates consistent data pagers that are us ed for access, and discarded when log-based update resumes.