Transaction - Rollback (Crash)

Data System Architecture

Transaction - Rollback (Crash)

About

A rollback ends a transaction and undo the changes.

Implementation

When a rollback statement is issued, rollback records of the rollback journal are used to undo changes that were made to the database by the transaction.




Discover More
Data System Architecture
Atomic Commit

An Atomic commit is a commit that implements atomicity for a transaction. Either all the tasks in a transaction must happen, or none of them. The transaction must be completed, or else it must be undone...
Data System Architecture
Data - Transaction (Trans(versal?) actions)

A single logical operation on the data is called a transaction. A physical operation is called a request and therefore a transaction is a queue of request. For example, a transfer of funds from one bank...
Data System Architecture
Data Management - (Transaction|Request|Commit|Redo) Log

(Transaction|Request|commit) logs are structured log file store all changes made to the data as they occur. They permits the implementation of : transaction isolation undoable operation. recovery...
Data System Architecture
Transaction - Traditional rollback journal

This page is the traditional implementation of the rollback journal (as opposed to a write-ahead log rollback journal) write-ahead log When a change occurs, the traditional rollback journal implements...
Data System Architecture
Transactions - Rollback Journal (Undo journal)

A rollback journal consists of records of the actions of transactions, primarily before they are committed. Its name comes from the fact that its primary function is to roll back (undo) changes from...
Data System Architecture
Transactions - Write-Ahead Logging (Rollback journal) - WAL

Write-Ahead Logging (WAL) is a rollback journal implementation. This implementation writes change directly to the rollback journal whereas the traditional rollback journal writes changes to the original...
Data System Architecture
What is Atomicity ? (Transaction|Action)

An atomic action is one that effectively happens all at once. An atomic action cannot stop in the middle: it either happens completely, or it doesn't happen at all. No side effects of an atomic action...



Share this page:
Follow us:
Task Runner