Backup and Restore

Data backup and recovery is one of the main mechanisms for ensuring data availability and integrity. They help protect data from loss in case of failures, accidents or malicious actions.

A unified data backup and recovery policy has been developed, which provides for:

• automatic creation of backups for all types of data and devices according to a specified schedule;
• procedures for restoring data from backups.

Data backup options

Full Backup

Creates a full copy of all data.

Requires more time and space, but provides fast recovery.

Example:

tar -czvf backup_full.tar.gz /path/to/data

Incremental backup

Creates a copy of only the data that has changed since the last backup.

Requires less time and space, but recovery may be slower.

Example:

rsync -av --compare-dest=/path/to/last_backup /path/to/data /path/to/incremental_backup

Differential Backup

Creates a copy of all data that has changed since the last full backup.

A compromise between full and incremental backups.

Example:

rsync -av --compare-dest=/path/to/full_backup /path/to/data /path/to/differential_backup

Backup Strategy

A backup strategy has been adopted that provides:

Rule 3-2-1

• 3 copies of data: Original data and two backups.
• 2 media types: Hard disk and cloud storage, for example.
• 1 off-site copy: For example, in the cloud or on a remote server.

Backup Frequency

• Define backup frequency based on data criticality (e.g. daily, weekly).

Backup Validation

• Regularly check backups for integrity and recoverability.
• Backup validation is organized in automatic mode according to a certain schedule.
• Automatic distribution of backup status to responsible persons.