A company needs to continuously run an experimental workload on an Amazon EC2 instance and stop the instance after 12 hours.
Which instance purchasing option will meet this requirement MOST cost-effectively?
A company needs to continuously run an experimental workload on an Amazon EC2 instance and stop the instance after 12 hours.
Which instance purchasing option will meet this requirement MOST cost-effectively?
For a task that requires running an experimental workload for a fixed duration of 12 hours, the most cost-effective instance purchasing option is Spot Instances. Spot Instances allow you to bid on spare Amazon EC2 capacity, often resulting in much lower costs compared to On-Demand Instances. While Spot Instances come with the risk of being interrupted by AWS, the substantial cost savings make them well-suited for experiments where uptime is less critical. This approach maximizes cost efficiency for short-term, flexible workloads.
Key Sentence " needs to continuously run" - so continuously and most cost effective is On Demand On-Demand Instances let you pay for compute capacity by the hour or second (minimum of 60 seconds) with no long-term commitments. This frees you from the costs and complexities of planning, purchasing, and maintaining hardware and transforms what are commonly large fixed costs into much smaller variable costs.
continuously run and stop, so here you still need underlying data / EBS volume intact. On-demand is the option. Spot instance don't retain your data.
Correct answer is C. Spot Instances While it’s true that On-Demand Instances can be used for continuous workloads, the key factor here is cost-effectiveness. In the context of the question, since the workload is experimental and can be stopped after 12 hours, Spot Instances would be the most cost-effective choice, even for a continuous workload. If the workload couldn’t be interrupted, then On-Demand Instances might be a better choice.
The on-the-spot choice was C) Spot Instances, but after re-reading the question several times, I realized that the company needs a CONTINUOUSLY running workload for 12 hours. Spot Instances can be interrupted by AWS, making them less reliable.
A is correct
Key Sentence " needs to continuously run" - so continuously and most cost effective is On Demand
Why not option "C"?? "run an experimental workload" "stop the instance after 12 hours."
Because it says "Continuously". Spot instances may be terminated after random time if they are needed.
only for 12 hours = On-Demand
" needs to continuously run" - so continuously and most cost effective is On Demand
My initial reaction is A, but is anyone able to explain why not D: Dedicated Host as isnt there a Dedicated host reservation option inside of dedicated host which can be 70% off?
C = CORRECT
A = CORRECT
The reason for choosing Spot Instances is that they offer the most cost-effective pricing model for workloads with flexible start and stop times. Spot Instances allow users to bid on unused EC2 capacity, often resulting in significantly lower prices compared to On-Demand or Reserved Instances. Since the workload in this scenario is experimental and can be stopped after 12 hours, leveraging Spot Instances enables the company to take advantage of cost savings without compromising performance or reliability. Additionally, Spot Instances can be terminated with a two-minute notification, which aligns well with the requirement to stop the instance after a specific duration. Overall, Spot Instances provide a cost-effective solution for running flexible and transient workloads like experimental tasks.
For a company that needs to continuously run an experimental workload on an Amazon EC2 instance and stop the instance after 12 hours, the most cost-effective purchasing option would be C. Spot Instances. Spot Instances offer the lowest cost compared to On-Demand Instances or Reserved Instances. With Spot Instances, you can take advantage of unused EC2 capacity at a discounted rate. This can be ideal for workloads that are flexible with timing and can tolerate potential interruptions.
C. Spot Instances Here's why Spot Instances are the best fit: Experimental workload: Since the workload is experimental and runs for a limited time (12 hours), there's no need for guaranteed uptime associated with On-Demand Instances.