PAS-C01 · Question #138
An SAP solutions architect is leading the SAP basis team for a company. The company's SAP landscape includes SAP HANA database instances for the following systems: sandbox, development, quality…
The correct answer is B. Use Amazon EventBridge (Amazon CloudWatch Events) and Amazon CloudWatch alarms to stop. Using Amazon EventBridge scheduled rules to automatically stop and start non-production SAP HANA EC2 instances outside business hours is the most cost-effective and fully automated approach.
Question
An SAP solutions architect is leading the SAP basis team for a company. The company's SAP landscape includes SAP HANA database instances for the following systems: sandbox, development, quality assurance test (QAT), system performance test (SPT), and production. The sandbox, development, and QAT systems are running on Amazon EC2 On-Demand Instances. The SPT and production systems are running on EC2 Reserved instances. All the EC2 instances are using Provisioned IOPS SSO (io2) Amazon Elastic Block Store (Amazon EBS) volumes. The entire development team is in the same time zone and works from 8 AM to 6 PM. The sandbox system is for research and testing that are not critical. The SPT and production systems are business critical. The company runs load-testing jobs and stress-testing jobs on the QAT systems overnight to reduce testing duration. The company wants to optimize infrastructure cost for the existing AWS resources. How can the SAP solutions architect meet these requirements with the LEAST amount of administrative effort?
Options
- AUse a Spot Fleet instead of the Reserved Instances and On-Demand Instances.
- BUse Amazon EventBridge (Amazon CloudWatch Events) and Amazon CloudWatch alarms to stop
- CMake the SAP basis team available 24 hours a day, 7 days a week to use the AWS CLI to stop
- DChange the EBS volume type to Throughput Optimized HDD (st1) for the /hana/data and /hana/log
How the community answered
(44 responses)- A7% (3)
- B80% (35)
- C11% (5)
- D2% (1)
Why each option
Using Amazon EventBridge scheduled rules to automatically stop and start non-production SAP HANA EC2 instances outside business hours is the most cost-effective and fully automated approach.
SAP does not certify or support running SAP HANA on Spot Instances because Spot Instances can be interrupted with only a 2-minute warning, making them unsuitable for SAP HANA database workloads at any tier.
Amazon EventBridge allows the creation of cron-based scheduled rules to automatically stop sandbox, development, and QAT EC2 instances at 6 PM and restart them at 8 AM, eliminating compute charges during off-hours without any manual intervention. This automated approach is reliable and scalable, reducing costs significantly while leaving the business-critical SPT and production Reserved Instances unaffected.
Requiring the SAP basis team to be available 24/7 to manually stop and start instances is operationally expensive and error-prone, negating the financial savings through increased labor costs and making it the least cost-effective option.
Throughput Optimized HDD (st1) volumes are not supported or certified by SAP for the /hana/data and /hana/log mount points, which require SSD-backed storage such as io2 or gp3 to meet SAP HANA I/O performance and certification requirements.
Concept tested: Automated EC2 scheduling for SAP non-production cost optimization
Source: https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-scheduled-rule-pattern.html
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