Exam AWS-SysOps topic 1 question 877 discussion

Exam question from Amazon's AWS-SysOps

Question #: 877
Topic #: 1

A company wants to reduce costs on jobs that can be completed at any time. The jobs are currently run using multiple On-Demand Instances, and the jobs take just under 2 hours to complete. If a job fails for any reason, it can be restarted from the beginning.
Which method is the MOST cost-effective based on these requirements?

A. Purchase Reserved Instances to be used for job execution.
B. Submit a request for a one-time Spot Instance for job execution.
C. Submit a request for a Spot block to be used for job execution.
D. Use a mixture of On-Demand and Spot Instances for job execution.

Show Suggested Answer

Suggested Answer: C 🗳️

by binhdt2611 at May 6, 2021, 7:58 a.m.

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Gorille69

1 year ago

it'is outdated. Spot Instances with a defined duration (also known as Spot blocks) are no longer available to new customers as of July 1, 2021. https://aws.amazon.com/fr/blogs/aws/new-ec2-spot-blocks-for-defined-duration-workloads/

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waterzhong

1 year, 2 months ago

You simply submit a Spot instance request and use the new BlockDuration parameter to specify the number of hours your want your instance(s) to run, along with the maximum price that you are willing to pay. When Spot instance capacity is available for the the requested duration, your instances will launch and run continuously for a flat hourly price. They will be terminated automatically at the end of the time block (you can also terminate them manually). This model is a good for situations where you have jobs that need to run continuously for up to 6 hours. https://aws.amazon.com/blogs/aws/new-ec2-spot-blocks-for-defined-duration-workloads/

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lin

1 year, 9 months ago

Spot Instance is the MOST cost-effective since it doesn't matter if the job is stopped, it can be started again from the beginning and Spot Instances are much cheaper than specifying a defined spot block duration.

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RicardoD

1 year, 10 months ago

C is the answer

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binhdt2611

1 year, 11 months ago

Answer is C - use Spot block is cost-effective In order to make EC2 an even better fit for this type of defined-duration workload, you can now launch Spot instances that will run continuously for a finite duration (1 to 6 hours). Pricing is based on the requested duration and the available capacity, and is typically 30% to 45% less than On-Demand, with an additional 5% off during non-peak hours for the region. Spot blocks and Spot instances are priced separately; you can view the current Spot pricing to learn more. https://aws.amazon.com/blogs/aws/new-ec2-spot-blocks-for-defined-duration-workloads/

upvoted 3 times

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