DBMS
Backup vs Archive
| Backup | Archive | |
|---|---|---|
| Purpose | Rapid recovery of live, changing data | Stores unchanging data no longer in use but must be retained |
| No. of Copies | Multiple copies | One copy |
| Speed | Restore speed is crucial | Retrieval speed not crucial |
| Retention time | Short term retention | Long term retention |
| **Modifying data ** | Duplicate copies are periodically overwritten | Data cannot be altered or deleted |