aws disaster_recovery_migrations
Disaster is any event that happens and impacts to the production business or finances, so we have to prepare some DR for it.
Terminology
- RPO: Recovery Point Objective
- RTO: Recovery Time Objective
- We can use route53 for switching dns for failover
RPO RTO
Link to original
Faster RTO more money by order
- Backup and Restore
- Pilot Light
- Warm Standby
- HotSite/MultiSite Approach
Backup and Restore
- Scheduling for backup
- Cheap, price based on storage
- High RPO, RTO
Pilot Light
- Small version of app always runs on the Cloud
- Only for critical core application, database.
- Using replication
- Can use Route53 for failover to the slave/backup one.
Warm Standby
- Run full system on at minimum scale on the Cloud
- Scale the load if disaster happens
Multi Site/ Hot Site
- Run full system at both on-premise, cloud
- Most expensive
AWS Multi Region
- Replication on all Cloud
- Only for cloud application like RDS
- Example: Aurora Global for slave/master with replication and failover if disaster happens