A company runs its SAP HANA database on an EC2 instance (r5.8xlarge) with 8 EBS gp2 volumes (1 TB each) in a RAID 0 stripe. The database is critical and requires high availability. The current architecture uses a single EC2 instance in one Availability Zone. The company wants to implement a disaster recovery solution with a Recovery Point Objective (RPO) of 15 minutes and a Recovery Time Objective (RTO) of 4 hours. The DR site must be in a different AWS Region. The SAP HANA database size is 4 TB. The company has a 1 Gbps Direct Connect connection between the primary and DR Regions. The database workload is write-intensive with an average write throughput of 200 MB/s. Which solution meets the RPO and RTO requirements?
HANA System Replication (HSR) in asynchronous mode can achieve an RPO of seconds, well within the 15-minute requirement. The 1 Gbps Direct Connect connection, with HANA's built-in compression, can handle the 200 MB/s write throughput (approximately 1.6 Gbps uncompressed, compressed to ~800 Mbps or less). Using the same instance type and EBS RAID 0 configuration ensures performance parity after takeover. HSR takeover can be completed in minutes, meeting the 4-hour RTO. Option A is correct.
Why this answer
HANA System Replication (HSR) in asynchronous mode can achieve an RPO of seconds, well within the 15-minute requirement. The 1 Gbps Direct Connect connection, with HANA's built-in compression, can handle the 200 MB/s write throughput (approximately 1.6 Gbps uncompressed, compressed to ~800 Mbps or less). Using the same instance type and EBS RAID 0 configuration ensures performance parity after takeover.
HSR takeover can be completed in minutes, meeting the 4-hour RTO. Option B is incorrect because EBS snapshots of a RAID array require stopping I/O for consistency, and taking snapshots every 15 minutes is impractical; restoring 4 TB from snapshots would significantly exceed the 4-hour RTO. Option C is incorrect because backing up to S3 every 15 minutes can impact database performance, and restoring from S3 takes longer than 4 hours due to data transfer and re-import time.
Option D is incorrect because AWS DMS does not natively support SAP HANA as a target for continuous replication; it is designed for heterogeneous migrations, not HANA-specific replication.