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2 hrs confidence:  
5 hrs confidence:
20 hrs confidence: peer agreement (net): +1
3 days13 hrs confidence: peer agreement (net): +1
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| Reference: 异地, 灾备 Reference information: “首先，数据中心选址，灾难备份中心与生产中心之间距离合理，应避免灾难备份中心与生产中心同时遭受同类风险，……；第三，建设方式，灾备中心的建设方式” “数据中心灾备有同城灾备、异地灾备以及同城—异地灾备三种主要方式。同城灾备，是指灾备中心与生产中心处于同一城市内，成本较低，可以快速灾难恢复和极高的数据保障，但无法应对区域性的灾难风险；异地灾备，是指灾备中心与生产中心在不同的城市，一般只能实现异步备份，成本较高，灾难恢复速度与数据保障能力略低，但可应付广泛的灾难风险；同城一异地灾备则是两者的结合，投资成本最高，但同时具有前两者优点。” 灾备 = 灾难备份 – disaster backup 异地 means the recovery data centre is in a different city, not just a different location -------------------------------------------------- Note added at 2 hrs (2011-02-17 10:18:16 GMT) -------------------------------------------------- This is from a Google search so it’s just for reference Reference: http://www.itzl.org/a/itzlview/ITanquan/2011/0124/3895.html |
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