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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク High availability software ： ウィキペディア英語版 High availability software High Availability Software refers to the use of software to ensure that systems are running (available) most of the time. High Availability is a characteristic of a system and is defined as the percentage of time that the system is functioning. It can be formally defined as (1 – (down time/ total time)) *100%. Although the minimum required availability varies by task, systems typically attempt to achieve 99.999% (5-nines) availability. This characteristic is weaker than fault tolerance, which typically seeks to provide 100% availability, albeit with significant price and performance penalties. High Availability Software is measured by its performance when a subsystem fails, its ability to resume service in a state close to the state of the system at the time of the original failure, and its ability to perform other service-affecting tasks (such as software upgrade or configuration changes) in a manner that eliminates or minimizes down time. All faults that affect availability – hardware, software, and configuration need to be addressed by High Availability Software to maximize availability. ==High Availability Software Features== 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「High availability software」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.