1.备份:
备份是指存储原始数据的副本,该副本可在数据丢失的情况下使用。备份被认为是数据保护的方法之一。组织的重要数据需要有效地备份,以保护有价值的数据。可以通过将原始数据的副本单独存储或在存储设备上存储数据库来实现备份。有多种备份类型,例如完全备份,增量备份,本地备份,镜像备份等。
备份的例子可以是SnapManager对数据库中的所有内容进行备份。
2.恢复:
恢复是指通过遵循某些过程来恢复丢失的数据。即使备份了数据,仍然会丢失,因此可以通过使用/实施一些恢复技术来恢复数据。如果由于任何原因导致数据库故障,那么就有数据丢失的可能性,因此在那种情况下,恢复过程有助于提高数据库的可靠性。
Recover的示例可以是SnapManager将数据恢复到最后一个事务。
备份和恢复之间的区别:
S.No. | BACKUP | RECOVERY |
---|---|---|
01. | Backup refers to storing a copy of original data separately. | Recovery refers to restoring the lost data in case of failure. |
02. | So we can say Backup is a copy of data which is used to restore original data after a data loss/damage occurs. | So we can say Recovery is a process of retrieving lost, corrupted or damaged data to its original state. |
03. | In simple backup is the replication of data. | In simple recovery is the process to store the database. |
04. | The prior goal of backup is just to keep one extra copy to refer in case of original data loss. | The prior goal of recovery is retrieve original data in case of original data failure. |
05. | It helps in improving data protection. | It helps in improving the reliability of the database. |
06. | Backup makes the recovery process more easier. | Recovery has no role in data backup. |
07. | The cost of backup is affordable. | The cost of recovery is expensive. |
08. | It’s production usage is very common. | It’s production usage is very rare. |
09. | Example of Backup can be SnapManager makes a backup of everything in database. | Example of Recover can be SnapManager recovers the data to the last transaction. |