# Backup Strategy

## Database Backups

### Automated Backups
- **Frequency**: Daily at 3 AM UTC
- **Retention**: 7 days daily, 4 weeks weekly, 12 months monthly
- **Storage**: Encrypted S3 bucket in separate region
- **Type**: Full backup + WAL archiving for point-in-time recovery

### Point-in-Time Recovery
- **RPO**: < 15 minutes
- **RTO**: < 1 hour
- **Method**: WAL archive restoration to specific timestamp

### Backup Verification
- Monthly restore test to staging environment
- Automated integrity checks on backup files
- Alert on backup failure within 5 minutes

## Redis Backups

### Configuration
- **RDB snapshots**: Every 6 hours
- **AOF persistence**: Enabled for point-in-time recovery
- **Storage**: Backed up to S3 daily

### Recovery
- Restore from latest RDB snapshot
- Replay AOF for recent changes
- Test data integrity after restore

## Backup Monitoring

### Alerts
- Backup failure → Immediate PagerDuty alert
- Backup size anomaly → Slack notification
- Restore test failure → Jira ticket creation

### Metrics
- Backup duration
- Backup size
- Restore time
- Data loss window (RPO)

## Emergency Procedures

### Complete Data Loss
1. Activate disaster recovery plan
2. Restore from latest backup
3. Replay WAL/AOF for recent changes
4. Verify data integrity
5. Resume operations

### Partial Data Corruption
1. Identify affected data
2. Restore specific tables from backup
3. Verify data consistency
4. Resume operations