1. 增量备份:
增量备份只保留上次完整备份或增量备份后发生变化的数据。这种类型的备份使用较少的存储,并且可以快速进行备份和恢复。此类备份中的数据包含冗余,因为恢复包括上次完整备份和所有增量备份。
增量备份中的恢复:
2. 差异备份:
差异备份仅保留上次完整备份的数据更改。这种类型的备份使用更多内存,因为它保存自上次完整备份以来的所有数据更改。它包含的冗余数据较少,恢复很容易,但创建备份所需的时间很长。
差异备份中的恢复:
增量备份和差异备份的区别:
S.NO. | Incremental Backup | Differential Backup |
---|---|---|
1. | In this type of backup successive copies of data contains only the changed part since the preceding backup copy was made. | In this type of backup only the difference in the data from last full backup is saved. |
2. | It has more redundant data than differential backup. | Differential backup contains less redundant data. |
3. | Recovery is difficult in this type of backup. | Recovery is easy as compared to incremental backup. |
4. | It takes less time to create backup. | It takes more time to create backup than incremental backup. |
5. | It take less data storage space to create backup. | Memory taken to create backup is more as compared to incremental backup. |
6. | Incremental backup uses less bandwidth. | Differential backup uses more bandwidth than incremental backup. |