Pemulihan bencana (DR) ialah perancangan tentang cara memulihkan sistem dan data selepas kegagalan atau bencana besar. AWS menawarkan strategi DR dengan pertukaran berbeza antara kelajuan pemulihan, kehilangan data, dan kos — ditakrifkan oleh objektif RTO dan RPO.
Konsep utama: RTO dan RPO
RTO (Recovery Time Objective) → how QUICKLY you must recover (acceptable downtime)
RPO (Recovery Point Objective) → how much DATA LOSS is acceptable (recover to how
recent a point — e.g. "at most 5 minutes of data lost")
→ Lower RTO/RPO (faster recovery, less data loss) = higher cost/complexity.
Define these based on business needs; they drive the DR strategy choice.
