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Revision as of 18:19, 2 February 2007
Welcome to Wikibon
Implementing 3 Node Disaster Recovery
Originating Author:
David Floyer
Disaster recovery in most organizations is based on a two-node topology, with one production site and a remote (>200 miles) backup disaster recovery location. In the event of a disaster, this approach will always result in some permanent data loss. This is true even if remote replication is used, as synchronous remote replication is not possible over long distances. For many organizations, the business risk associated with this reality is becoming unacceptable, and reducing the probability of permanent data loss is a business imperative. Modern three node disaster recovery topologies offer a potential solution. read more
3 node DR Analysis Milestones
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...that as much as 10 exabytes of information will be created in 2006 on print, film, magnetic, and optical storage media.
...that 1,000 exabytes equals 1 zettabyte and that 1,000 zettabytes equals 1 yottabyte?
...that a googol is a number equal to a 1 followed by 100 zeros and expressed 10100? This concept was introduced by U.S. mathematician Edward Kasner (1878-1955).
...that in September 1956, IBM announced the first commercial disk drive, inside the RAMAC 305 computer system, with 5MB of capacity on fifty 24-inch diameter platters. The RAMAC 350 disk unit was priced at $7,800 per megabyte.