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In computer science, in the field of databases, read–write conflict, also known as unrepeatable reads, is a computational anomaly associated with interleaved execution of transactions. Given a schedule S In this example, T1 has read the original value of A, and is waiting for T2 to finish. T2 also reads the original value of A, overwrites A, and commits.

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  • Nichtwiederholbares Lesen oder Non-Repeatable Read bezeichnet in der Informatik ein Problem, das auftritt, wenn innerhalb einer Transaktion die gleiche Leseoperation nacheinander unterschiedliche Ergebnisse liefert. (de)
  • In computer science, in the field of databases, read–write conflict, also known as unrepeatable reads, is a computational anomaly associated with interleaved execution of transactions. Given a schedule S In this example, T1 has read the original value of A, and is waiting for T2 to finish. T2 also reads the original value of A, overwrites A, and commits. However, when T1 reads from A, it discovers two different versions of A, and T1 would be forced to abort, because T1 would not know what to do. This is an unrepeatable read. This could never occur in a serial schedule. Strict two-phase locking (Strict 2PL) or Serializable Snapshot Isolation (SSI) prevent this conflict. (en)
  • In informatica, con il termine unrepeateble read, o inconsistent analysis, si intende un errore nella gestione della concorrenza tra transazioni dovuta ad una dipendenza read -> write. L'unrepeateble read è un'analisi incoerente di dati di un database da parte di una transazione causata da aggiornamenti prodotti da un'altra. (it)
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  • Nichtwiederholbares Lesen oder Non-Repeatable Read bezeichnet in der Informatik ein Problem, das auftritt, wenn innerhalb einer Transaktion die gleiche Leseoperation nacheinander unterschiedliche Ergebnisse liefert. (de)
  • In informatica, con il termine unrepeateble read, o inconsistent analysis, si intende un errore nella gestione della concorrenza tra transazioni dovuta ad una dipendenza read -> write. L'unrepeateble read è un'analisi incoerente di dati di un database da parte di una transazione causata da aggiornamenti prodotti da un'altra. (it)
  • In computer science, in the field of databases, read–write conflict, also known as unrepeatable reads, is a computational anomaly associated with interleaved execution of transactions. Given a schedule S In this example, T1 has read the original value of A, and is waiting for T2 to finish. T2 also reads the original value of A, overwrites A, and commits. (en)
rdfs:label
  • Nichtwiederholbares Lesen (de)
  • Unrepeatable read (it)
  • Read–write conflict (en)
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