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There are many different data backup strategies, including partial backups, data snapshots, continuous backups, mirror backups, and full backups. Information technology (IT) managers have long known how critical it is to backup both system and data files on a regular basis. Backups ensure that files and computer systems can be restored to a previous point in time in the event of data loss, natural disasters, system outages, or hardware failure. For many years, most companies performed daily backups in the middle of the night, when system resources were not being used. They would then perform a full backup of all computer systems and data on a weekly basis. This strategy is no longer practical, however, due to the massive amounts of data that companies must now manage. Also, many companies must keep their computer systems running around the clock. Partial backups, also called incremental backups, are useful in some situations, although restoring data that has been partially backed up can present its own problems. Continuous data protection (CDP) is best for companies with real-time database-driven systems. This type of system requires the backing up of every I/O operation, file change, disk write, and transaction. Snapshots are a very fast way to restore a system to a prior point of time.
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Information Sources, Inc.
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