Backup Strategies
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Backup Strategies
3-2-1-1 Backup Rule
The original 3-2-1 backup strategy was conceived before the internet era and is perfectly sufficient in most scenarios. However, in recent years, this approach has been expanded to the 3-2-1-1 backup rule in response to the cyberthreat landscape and data compliance requirements. The 3-2-1-1 backup strategy:
- Keep at least three (3) copies of your data.
- Store two (2) backup copies on different storage media.
- Store one (1) copy offsite.
- Create one (1) immutable or air-gapped backup copy.
Immutable backups
- Are backup files stored using the write-once-read-many (WORM) model.
- Cannot be modified or deleted making them immune to ransomware attacks or accidental or intentional deletion.
- Examples: immutable storage can be configured on Linux OS based machines, or in the cloud like AWS with S3 object lock feature.
Runbook Automation
- Is a system whereby procedures to be carried out regularly to maintain performance within computer systems.
- Automating the runbook process of completing the runbook without manual input increasing efficiency and reliability.