Storage usage is growing at an unprecedented rate within companies today. Businesses are becoming increasingly dependent on continuous access to stored data. As the number of mission-critical servers and storage resources grow, so does the importance of protecting against service interruptions, disasters, and other problems that may threaten the organization's ability to provide access to its key data when needed. There are a number of strategies that can be employed to protect important data. Each strategy has its place, because each has particular characteristics that make it well- or ill-suited for particular tasks. This paper examines in detail the various data replication technologies available today and compares their relative strengths and weaknesses.
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