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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 Write–read conflict ： ウィキペディア英語版 Write–read conflict In computer science, in the field of databases, Write-Read Conflict, also known as reading uncommitted data, is a computational anomaly associated with interleaved execution of transactions. Given a schedule S :$S\; =\; \backslash begin$ T1 & T2 \\ R(A) & \\ W(A) & \\ & R(A) \\ & W(A)\\ & R(B) \\ & W(B) \\ & Com. \\ R(B) & \\ W(B) & \\ Com. & \end T2 could read a database object A, modified by T1 which hasn't committed. This is a ''dirty read''. T1 may write some value into A which makes the database inconsistent. It is possible that interleaved execution can expose this inconsistency and lead to inconsistent final database state, violating ACID rules. Strict 2PL overcomes this inconsistency by locking T2 out from performing a Read/Write on A. Note however that Strict 2PL can have a number of drawbacks, such as the possibility of deadlocks. == See also == * Concurrency control * Read-Write conflict * Write-Write conflict 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「Write–read conflict」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.