You run a web application where web servers on EC2 Instances are In an Auto Scaling group
Monitoring over the last 6 months shows that 6 web servers are necessary to handle the minimum
load During the day up to 12 servers are needed Five to six days per year, the number of web
servers required might go up to 15.
What would you recommend to minimize costs while being able to provide hill availability?
A.
6 Reserved instances (heavy utilization). 6 Reserved instances {medium utilization), rest
covered by On-Demand instances
B.
6 Reserved instances (heavy utilization). 6 On-Demand instances, rest covered by Spot
Instances
C.
6 Reserved instances (heavy utilization) 6 Spot instances, rest covered by On-Demand
instances
D.
6 Reserved instances (heavy utilization) 6 Reserved instances (medium utilization) rest covered
by Spot instances
B
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C is correct, it is cheaper than B. If you cant obtain your 6 spot instances, and they terminate 4 of them, then you can fill remaining 4 with on-demand
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answer should be 6 reserved instances rest should be covered by on demand.
With Reserved Instances, you can choose the type that best fits your applications needs.
Standard Reserved Instances: These provide the most significant discount (up to 75% off On-Demand) and are best suited for steady-state usage.
Convertible Reserved Instances: These provide a discount (up to 45% off On-Demand) and the capability to change the attributes of the Reserved Instance as long as the exchange results in the creation of Reserved Instances of equal or greater value. Like Standard Reserved Instances, Convertible Reserved Instances are best suited for steady-state usage.
Scheduled Reserved Instances: These are available to launch within the time windows you reserve. This option allows you to match your capacity reservation to a predictable recurring schedule that only requires a fraction of a day, a week, or a month.
https://aws.amazon.com/ec2/pricing/reserved-instances/
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A is the answer. You cannot have Spot instances because it does not guarantee availability
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When you you spot instances you have to be prepared for interruption . Not a viable option for high-availability http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/how-spot-instances-work.html
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A
Spot instances are meant for HA build outs.
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A We are not sure abt spot instance availablity
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A
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Ans: A (6 Reserved instances (heavy utilization). 6 Reserved instances {medium utilization), rest covered by On-Demand instances)
You cannot have Spot instances because it does not guarantee full availability, as required and mention in question.
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A
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B
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