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@ -1015,7 +1015,13 @@
resulting in a circular dependency and a system halt. It is a form of resulting in a circular dependency and a system halt. It is a form of
resource contention that can occur in concurrent systems, including resource contention that can occur in concurrent systems, including
database management systems. database management systems.
- Example:
- Cascading rollback #flashcard - Cascading rollback #flashcard
- Cascading Rollback: a transaction (T1) causes a
failure and a rollback must be performed. Other
transactions dependent on T1's actions must also
be rollbacked, thus causing a cascading effect.
- One transaction's failure causes many to fail.
- DONE ACID (Atomicity, Consistency, Isolation, Durability): A set of properties that guarantee the reliability and integrity of database transactions. #flashcard - DONE ACID (Atomicity, Consistency, Isolation, Durability): A set of properties that guarantee the reliability and integrity of database transactions. #flashcard
collapsed:: true collapsed:: true
- Atomicity: :-> The property that ensures a transaction is treated as a single, indivisible unit of work. It either executes all its operations successfully or rolls back to the initial state if any operation fails. - Atomicity: :-> The property that ensures a transaction is treated as a single, indivisible unit of work. It either executes all its operations successfully or rolls back to the initial state if any operation fails.