From eda2a0d6d1a668f573afc745ed4189933cb87256 Mon Sep 17 00:00:00 2001 From: Ryan Date: Wed, 14 Jun 2023 16:50:26 +0800 Subject: [PATCH] Auto saved by Logseq --- pages/总复习2023t1.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md index 2070881..53d8955 100644 --- a/pages/总复习2023t1.md +++ b/pages/总复习2023t1.md @@ -1015,7 +1015,13 @@ resulting in a circular dependency and a system halt. It is a form of resource contention that can occur in concurrent systems, including database management systems. + - Example: - 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 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.