Backup and Recovery
Methodical process for protecting and restoring data and systems to minimize downtime and data loss.
Classification
- ComplexityMedium
- Impact areaTechnical
- Decision typeArchitectural
- Organizational maturityIntermediate
Technical context
Principles & goals
Use cases & scenarios
Compromises
- Faulty or corrupted backups going undetected.
- Insufficient testing leading to false assumptions about recoverability.
- Attacks on backup archives (e.g., ransomware) compromising restores.
- Implement 3-2-1 rule (3 copies, 2 media, 1 offsite copy).
- Encrypt backups at rest and in transit.
- Conduct regular, scheduled recovery drills.
I/O & resources
- Asset inventory and classification
- RTO/RPO specifications
- Available storage and network infrastructure
- Documented backup strategy and playbooks
- Planned recovery tests and reports
- Monitoring metrics for RPO/RTO
Description
Backup and Recovery is a methodical process to ensure restoreability of data and systems after failures. It covers strategy, retention, backup mechanisms, validation, and recovery testing. The goal is to minimize data loss, recovery time, and operational downtime through defined processes, roles, and periodic verification.
✔Benefits
- Reduced data loss and faster business resumption.
- Improved compliance and traceability of recovery processes.
- Increased system resilience through documented processes and tests.
✖Limitations
- Requires additional storage and operational costs.
- Complexity increases with heterogeneous system landscapes.
- Incomplete backups can make recovery impossible.
Trade-offs
Metrics
- RTO (Recovery Time Objective)
Maximum tolerable time to restore a service.
- RPO (Recovery Point Objective)
Maximum tolerable data loss measured in time (e.g., minutes/hours).
- Restore duration and success rate
Measured time and share of successful restores during drills.
Examples & implementations
Database point-in-time restore
Example implementation of a point-in-time restore for PostgreSQL using WAL archiving with full validation.
Cloud backup using object storage
Use of incremental backups to object storage with lifecycle policies for cost optimization.
Offsite backup and disaster recovery
Combination of daily snapshots and weekly offsite archive copies to protect against site failure.
Implementation steps
Inventory critical assets and classify by business value.
Define RTO/RPO and prioritize backup targets.
Select appropriate backup media and methods (snapshots, incremental, replication).
Automate backup execution and set up monitoring.
Regularly validate via restore tests and document results.
Continuously adjust retention and cost strategy.
⚠️ Technical debt & bottlenecks
Technical debt
- Old, unstructured backup scripts without automation.
- Missing monitoring and alerting mechanisms for backup failures.
- Undocumented restore processes for critical assets.
Known bottlenecks
Misuse examples
- Restoring corrupted backups without integrity checks.
- Using old snapshots that do not meet compliance requirements.
- Using production backups for test environments without masking sensitive data.
Typical traps
- Assuming backups automatically mean restores will work.
- Underestimating network capacity for regular replication.
- Neglecting test documentation and lessons learned.
Required skills
Architectural drivers
Constraints
- • Budget constraints for redundant infrastructure
- • Data sovereignty and regulatory requirements
- • Technical compatibility of heterogeneous systems