Backup

Backup (Backup) is a procedure for creating a copy of data that is stored separately from the original, usually on other storage media (local or cloud). The purpose of backup is to prevent irretrievable data loss and ensure that data can be restored in the event of hardware failures, software errors, accidental or intentional deletion, and other unforeseen situations.

A backup allows data to be quickly restored to its original form at the time the copy was created, which is critical to keeping businesses running smoothly and reducing costs. There are several types of backups:

• Full - all data is copied in its entirety, which maximizes completeness but requires a significant amount of storage space.
• Incremental - only changes since the last backup are backed up, which saves space and time but requires all previous copies to restore.
• Differential - copies changes since the last full backup, balancing data size and recovery speed.

Backups can be performed in real time without system interruption or with the database offline to ensure consistency. For effective utilization, it is important to choose the right backup frequency, media rotation scheme and backup retention period based on business requirements and risks.

Thus, backup is a key element of data protection, ensuring the safety of information and the ability to restore it in various emergency situations.