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- Write-ahead_logging abstract "In computer science, write-ahead logging (WAL) is a family of techniques for providing atomicity and durability (two of the ACID properties) in database systems.In a system using WAL, all modifications are written to a log before they are applied. Usually both redo and undo information is stored in the log.The purpose of this can be illustrated by an example. Imagine a program that is in the middle of performing some operation when the machine it is running on loses power. Upon restart, that program might well need to know whether the operation it was performing succeeded, half-succeeded, or failed. If a write-ahead log is used, the program can check this log and compare what it was supposed to be doing when it unexpectedly lost power to what was actually done. On the basis of this comparison, the program could decide to undo what it had started, complete what it had started, or keep things as they are.WAL allows updates of a database to be done in-place. Another way to implement atomic updates is with shadow paging, which is not in-place. The main advantage of doing updates in-place is that it reduces the need to modify indexes and block lists.ARIES is a popular algorithm in the WAL family.File systems typically use a variant of WAL for at least file system metadata called journaling.".
- Write-ahead_logging wikiPageID "244953".
- Write-ahead_logging wikiPageLength "1630".
- Write-ahead_logging wikiPageOutDegree "13".
- Write-ahead_logging wikiPageRevisionID "666090876".
- Write-ahead_logging wikiPageWikiLink ACID.
- Write-ahead_logging wikiPageWikiLink Algorithms_for_Recovery_and_Isolation_Exploiting_Semantics.
- Write-ahead_logging wikiPageWikiLink Atomic_(computer_science).
- Write-ahead_logging wikiPageWikiLink Category:Database_algorithms.
- Write-ahead_logging wikiPageWikiLink Computer_science.
- Write-ahead_logging wikiPageWikiLink Database.
- Write-ahead_logging wikiPageWikiLink Database_log.
- Write-ahead_logging wikiPageWikiLink Database_system.
- Write-ahead_logging wikiPageWikiLink Durability_(database_systems).
- Write-ahead_logging wikiPageWikiLink File_system.
- Write-ahead_logging wikiPageWikiLink In-place_algorithm.
- Write-ahead_logging wikiPageWikiLink Journaling_file_system.
- Write-ahead_logging wikiPageWikiLink Linearizability.
- Write-ahead_logging wikiPageWikiLink Metadata.
- Write-ahead_logging wikiPageWikiLink Shadow_paging.
- Write-ahead_logging wikiPageWikiLink Transaction_log.
- Write-ahead_logging wikiPageWikiLinkText "Write-ahead logging".
- Write-ahead_logging wikiPageWikiLinkText "write-ahead logging".
- Write-ahead_logging wikiPageWikiLinkText "write-ahead logs".
- Write-ahead_logging hasPhotoCollection Write-ahead_logging.
- Write-ahead_logging wikiPageUsesTemplate Template:Database-stub.
- Write-ahead_logging wikiPageUsesTemplate Template:Reflist.
- Write-ahead_logging subject Category:Database_algorithms.
- Write-ahead_logging hypernym Family.
- Write-ahead_logging type Algorithm.
- Write-ahead_logging comment "In computer science, write-ahead logging (WAL) is a family of techniques for providing atomicity and durability (two of the ACID properties) in database systems.In a system using WAL, all modifications are written to a log before they are applied. Usually both redo and undo information is stored in the log.The purpose of this can be illustrated by an example. Imagine a program that is in the middle of performing some operation when the machine it is running on loses power.".
- Write-ahead_logging label "Write-ahead logging".
- Write-ahead_logging sameAs WAL-Prinzip.
- Write-ahead_logging sameAs ログ先行書き込み.
- Write-ahead_logging sameAs 로그_선행_기입.
- Write-ahead_logging sameAs m.01kg_v.
- Write-ahead_logging sameAs Q627688.
- Write-ahead_logging sameAs Q627688.
- Write-ahead_logging sameAs 预写式日志.
- Write-ahead_logging wasDerivedFrom Write-ahead_logging?oldid=666090876.
- Write-ahead_logging isPrimaryTopicOf Write-ahead_logging.