logical unit of work(luw)怎么讀

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logical unit of work(luw)英語什么意思：A sequence of processing actions (data base changes for example) that must be completed before any of the individual actions can be regarded as committed. When changes are committed (by successful completion of the LUW and recording of the sync point on the system log), they do not need to be backed out after a subsequent failure of the task or system.The end of an LUW is marked in a transaction by a sync point—issued either by the user program or by CICS at the end of task. In the absence of user sync points, the entire task is an LUW.; 在認(rèn)為某一操作結(jié)束前,必須完成的一系列處理活動(例如更改數(shù)據(jù)庫)。如果更改結(jié)束(LUW成功地完成且已在系統(tǒng)日志上記錄了同步點),則在隨后發(fā)生任務(wù)或系統(tǒng)失敗的情況下,就不必復(fù)原這些曾做過的更改。在一個事項處理程序(即交易)中, 由同步點(在任務(wù)結(jié)束時由用戶程序發(fā)出,或由CICS發(fā)出)標(biāo)識一個LUW的結(jié)束。如果沒有用戶同步點,則整個任務(wù)為一個LUW。

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