You have a periodic image analysis application that gets some files in input, analyzes them and
for each file writes some data in output to a text file. The number of files in input per day is high
and concentrated in a few hours of the day.
Currently you have a server on EC2 with a large EBS volume that hosts the input data and the
results. It takes almost 20 hours per day to complete the process.
What services could be used to reduce the elaboration time and improve the availability of the
solution?
A.
S3 to store I/O files, SQS to distribute elaboration commands to a group of hosts working in
parallel, Auto Scaling to dynamically size the group of hosts depending on the length of the SQS
queue.
B.
S3 to store I/O files, SNS to distribute elaboration commands to a group of hosts working in
parallel, Auto Scaling to dynamically size the group of hosts depending on the number of SNS
notifications.
C.
EBS with Provisioned IOPS (PIOPS) to store I/O files, SNS to distribute elaboration commands to
a group of hosts working in parallel, Auto Scaling to dynamically size the group of hosts
depending on the number of SNS notifications.
D.
EBS with Provisioned IOPS (PIOPS) to store I/O files, SQS to distribute elaboration commands to
a group of hosts working in parallel. Auto Scaling to dynamically size the group of hosts
depending on the length of the SQS queue.
A should be the right answer.
PIOPS is good for performance but not for availability. And the question is asking for availability.
SNS is a notification tool. It doesn’t allow you to distribute tasks between group of hosts. Auto-scaling based on the notification will not make much sense
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I think A is correct! In D, PIOPS EBS can not provide HA and PIOPS has its own limit, however, S3 has no limiti for cocurrent visit, of couse the performance may be better.
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A
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Answer is A.
S3 has more availability than EBS.
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@Unaat: u sure on A? I am also preparing for SAA exam. Hv u cleared SAA recently?
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