pointintimeåterställning

Point-in-time restore, often abbreviated as PITR, is a data recovery method that allows users to restore a database or a system to a specific moment in time. This is distinct from simply restoring the latest backup. PITR relies on a combination of full backups and transaction logs. A full backup captures the entire state of the data at a particular point, while transaction logs record all subsequent changes made to the data.

To perform a point-in-time restore, the system first restores the most recent full backup taken before the desired restore point. Then, it applies the transactions from the log files sequentially up to the exact moment in time the user has specified. This process effectively reconstructs the data as it existed at that precise moment, ensuring that no data entered after that point is included, and any data lost or corrupted after that point is recovered.

PITR is crucial for disaster recovery and for recovering from human error, such as accidental data deletion or incorrect updates. It provides a granular level of control over data recovery, minimizing data loss and downtime. The effectiveness of PITR depends on the frequency of full backups and the logging strategy employed by the system. Regular transaction log archiving is essential for successful point-in-time restores.