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2. Write–read conflict - Wikipedia

   en.wikipedia.org/wiki/Write–read_conflict

   T2 could read a database object A, modified by T1 which hasn't committed. This is a dirty or inconsistent 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 an inconsistent final database state, violating ACID rules.

3. Isolation (database systems) - Wikipedia

   en.wikipedia.org/wiki/Isolation_(database_systems)

   Isolation is typically enforced at the database level. However, various client-side systems can also be used. It can be controlled in application frameworks or runtime containers such as J2EE Entity Beans [2] On older systems, it may be implemented systemically (by the application developers), for example through the use of temporary tables.

4. Read–write conflict - Wikipedia

   en.wikipedia.org/wiki/Read–write_conflict

   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. Specifically, a read–write conflict occurs when a "transaction requests to read an entity for which an unclosed transaction has already made a write request."

5. Algorithms for Recovery and Isolation Exploiting Semantics

   en.wikipedia.org/wiki/Algorithms_for_Recovery...

   Write-ahead logging: Any change to an object is first recorded in the log, and the log must be written to stable storage before changes to the object are written to disk. Repeating history during Redo: On restart after a crash, ARIES retraces the actions of a database before the crash and brings the system back to the exact state that it was in ...

6. Write–write conflict - Wikipedia

   en.wikipedia.org/wiki/Write–write_conflict

   In computer science, in the field of databases, write–write conflict, also known as overwriting uncommitted data is a computational anomaly associated with interleaved execution of transactions. Specifically, a write–write conflict occurs when "transaction requests to write an entity for which an unclosed transaction has already made a ...

7. Two-phase locking - Wikipedia

   en.wikipedia.org/wiki/Two-phase_locking

   A transaction is allowed to write an object if and only if it is holding a write-lock on that object. A schedule (i.e., a set of transactions) is allowed to hold multiple locks on the same object simultaneously if and only if none of those locks are write-locks. If a disallowed lock attempts on being held simultaneously, it will be blocked.

8. Mnesia - Wikipedia

   en.wikipedia.org/wiki/Mnesia

   The semantics of using transactions in this way remains consistent, making it easy to write library code that works equally in either context. General coding style for Mnesia will always use transactions. For performance reasons, it also supports deliberate "dirty operations" which avoid transactions.

9. Thomas write rule - Wikipedia

   en.wikipedia.org/wiki/Thomas_write_rule

   In computer science, particularly the field of databases, the Thomas write rule is a rule in timestamp-based concurrency control. It can be summarized as ignore outdated writes . It states that, if a more recent transaction has already written the value of an object, then a less recent transaction does not need to perform its write since the ...