Disaster Recovery has come a long way since the days when companies did a backup and aimed for a "best effort" recovery. In fact, the term "disaster recovery" has evolved. No longer do we narrow "disasters" down to a hole in the ground or a fire in the data centre. "Disaster recovery" became "business recovery" since, after all, what you want is not merely to get your computer systems up and running again: you want a business up and running. How quickly? I've been working recently somewhere...
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Tags: 
rpo
rto
backup
recovery_point_objective
business_continuity
disaster_recovery
recovery_time_objective
replication