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Exam AWS-SysOps topic 1 question 545 discussion

Exam question from Amazon's AWS-SysOps
Question #: 545
Topic #: 1
[All AWS-SysOps Questions]

A new application is being tested for deployment on an Amazon EC2 instance that requires greater IOPS than currently provided by the single 4TB General
Purpose SSD (gp2) volume.
Which actions should be taken to provide additional Amazon EBS IOPS for the application? (Choose two.)

  • A. Increase the size of the General Purpose (gp2) volume
  • B. Use RAID 0 to distribute I/O across multiple volumes
  • C. Migrate to a Provisioned IOPS SSD (io1) volume
  • D. Enable MAX I/O performance mode on the General Purpose (gp2) volume
  • E. Use RAID 1 to distribute I/O across multiple volumes
Show Suggested Answer Hide Answer
Suggested Answer: AD 🗳️
by jxhyxxclyp at Sept. 6, 2019, 9:40 a.m.
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Moon
Highly Voted 2 years, 6 months ago
B & C... A: 4TB is reaching (almost reaching) max IOPS for general SSD which WAS 10K....(recently it is 16K). C: Max I/O, is for EFS. D: RAID 1, is not reducing IOPS.
upvoted 5 times
winmacman
2 years, 5 months ago
B and C. A is wrong. Only small crease in performance up to 5TB, see the article https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html
upvoted 2 times
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albert_kuo
Most Recent 10 months ago
Selected Answer: BC
the recommended actions to provide additional Amazon EBS IOPS for the application are to migrate to a Provisioned IOPS SSD (io1) volume and consider using RAID 0 to distribute I/O across multiple volumes if data redundancy is not a requirement.
upvoted 1 times
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suba1234
2 years, 5 months ago
A & C should be correct
upvoted 1 times
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anishmn10
2 years, 5 months ago
ANSWER IS B,C
upvoted 1 times
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sen12
2 years, 6 months ago
B & C looks to be correct
upvoted 1 times
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wshyang
2 years, 6 months ago
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html Peak iops for gp2 is at 5.3TB, there is no guarantee that raid 0 will give more iops if you are using 2 smaller gp2 volumes.
upvoted 1 times
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saumenP
2 years, 6 months ago
A&C should be correct.
upvoted 1 times
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saumenP
2 years, 7 months ago
GP2 is designed to deliver the provisioned performance 99% of the time. If you need a greater number of IOPS than gp2 can provide, or if you have a workload where low latency is critical or you need better performance consistency, we recommend that you use io1.
upvoted 3 times
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saumenP
2 years, 7 months ago
B&C should be correct. A - wrong because increase in size helps only for provisioned IOPS SSD, not GPs D - Wrong because Max I/O Performance Mode is used for EFS
upvoted 4 times
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jxhyxxclyp
2 years, 7 months ago
why not bc？？？？？？？？
upvoted 1 times
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