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disaster recovery plan : ウィキペディア英語版
disaster recovery plan

A disaster recovery plan (DRP) is a documented process or set of procedures to recover and protect a business IT infrastructure in the event of a disaster. Such a plan, ordinarily documented in written form, specifies procedures an organization is to follow in the event of a disaster. It is "a comprehensive statement of consistent actions to be taken before, during and after a disaster." The disaster could be natural, environmental or man-made. Man-made disasters could be intentional (for example, an act of a terrorist) or unintentional (that is, accidental, such as the breakage of a man-made dam).
Given organizations' increasing dependency on information technology to run their operations, a disaster recovery plan, sometimes erroneously called a Continuity of Operations Plan (COOP), is increasingly associated with the recovery of information technology data, assets, and facilities.
==Objectives==

Organizations cannot always avoid disasters, but with careful planning the effects of a disaster can be minimized. The objective of a disaster recovery plan is to minimize downtime and data loss.〔(''An Overview of the Disaster Recovery Planning Process - From Start to Finish.'' ) Comprehensive Consulting Solutions Inc. "Disaster Recovey Planning, An Overview: White Paper." March 1999. Retrieved 8 August 2012.〕 The primary objective is to protect the organization in the event that all or part of its operations and/or computer services are rendered unusable. The plan minimizes the disruption of operations and ensures that some level of organizational stability and an orderly recovery after a disaster will prevail.〔 Minimizing downtime and data loss is measured in terms of two concepts: the recovery time objective (RTO) and the recovery point objective (RPO).

The recovery time objective is the time within which a business process must be restored, after a major incident (MI) has occurred, in order to avoid unacceptable consequences associated with a break in business continuity. The recovery point objective (RPO) is the age of files that must be recovered from backup storage for normal operations to resume if a computer, system, or network goes down as a result of a MI. The RPO is expressed backwards in time (that is, into the past) starting from the instant at which the MI occurs, and can be specified in seconds, minutes, hours, or days.〔(''Definition: Recovery point objective (RPO).'' ) Retrieved 10 August 2012.〕 The recovery point objective (RPO) is thus the maximum acceptable amount of data loss measured in time. It is the age of the files or data in backup storage required to resume normal operations after the MI.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「disaster recovery plan」の詳細全文を読む



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