Crash Recovery: Meaning, Aries, Algorithms for Recovery, Atomicity, Media Recovery | Acadlly.com скачать в хорошем качестве

Crash Recovery: Meaning, Aries, Algorithms for Recovery, Atomicity, Media Recovery | Acadlly.com

DEFINITION OF CRASH RECOVERY: Crash recovery refers to the process of restoring a database to a consistent and usable state after a system crash. This involves rolling back incomplete transactions and completing committed transactions that were still in memory at the time of the crash. The database reaches a point of consistency when it is in a stable and usable state. Recovery becomes necessary after a transaction failure. CONDITIONS THAT CAN LEAD TO TRANSACTION FAILURE: 1. Power failure on the machine hosting the database manager and its partitions, causing a system shutdown. 2. Hardware failures such as memory corruption, disk failure, CPU malfunction, or network failure. 3. Serious operating system error that results in the database going down. INTRODUCTION TO ARIES (ALGORITHMS FOR RECOVERY AND ISOLATION EXPLOITING SEMANTICS) ARIES is a recovery algorithm designed for databases that adopt the no-force, steal approach. It is utilized by various database systems including IBM DB2 and MS SQL Server. For a full lesson note, please visit https://acadlly.com Please kindly subscribe and turn on the notification bell.