A company wants to continuously replicate on-premises and cloud servers to AWS so that those servers can be quickly recovered (failed over) on AWS in the event of a disaster. Which AWS service is designed for this disaster recovery use case?
A question asking to identify the disaster recovery service based on continuous replication.
AWS Backup
This is incorrect. AWS Backup is a service that periodically collects and centrally manages backups across multiple services using policies.
Restoring from a backup returns data to the state at the time of the backup snapshot. The requirement for short-time failover via continuous replication is the role of AWS Elastic Disaster Recovery, not AWS Backup.
AWS Elastic Disaster Recovery
This is correct. AWS Elastic Disaster Recovery (AWS DRS) is a disaster recovery (DR) service that continuously replicates servers to AWS and enables fast failover recovery in the event of a disaster. It maintains a low-cost staging area on standby and scales to full capacity when needed.
AWS DMS
This is incorrect. AWS DMS (Database Migration Service) is a replication service for migrating databases with minimal downtime.
Its scope is databases, and it does not provide the DR mechanism for failing over entire servers on AWS in the event of a disaster.
AWS Storage Gateway
This is incorrect. AWS Storage Gateway is a hybrid integration service that allows on-premises environments to use cloud storage via standard protocols.
Its role is bridging storage, and it does not provide the ability to replicate servers and bring them back online on AWS in the event of a disaster.
'Continuous replication' and 'failover recovery in a disaster' both point to AWS Elastic Disaster Recovery (DRS). Its purpose differs from AWS Backup: DR focuses on operational recovery while Backup focuses on data protection.