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Chapter 3: Backup and RecoveryOverviewThe most important aspect of a technical implementation is establishing an effective backupand recovery strategy. This process entails a restore of all, or part, of the database afterhardware or software errors and a recovery during which the system is updated to a pointjust before the failure. There are many situations other than disk failures that may require arestore and recovery.Your backup strategy should be as uncomplicated as possible. Complications in backupstrategy can create difficult situations during restoration and recovery. Procedures, problemidentification, and handling must be well documented so all individuals clearly understandtheir roles and required tasks. This strategy should also not adversely impact daily business.This chapter discusses backup and restore of your system. The details of a specific databaseare covered in the database administration chapter(s). The information in this chapter willhelp you better understand the concepts that enhance your operating environment andaccess the methods that best suit your needs.Usually a restore is done to: Recover after a disaster Test your disaster recovery plan Copy your database to another system(For additional details on the first two items, see chapter 2; and for details on the last item,see chapter 23.)The business requirement for speed in a restore is driven by the need to get the systemquickly operational after a disaster. This way, the company can continue to do business.Business recovery time is the result of the time needed to: Find the problem Repair the damage Restore the databaseFactors that affect the chosen restore strategy include: Business cost of downtime to recover Operational schedule Global or local users Number of transactions an hour Budget3–2Release 4.6A/B