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Exam AWS Certified Solutions Architect - Associate SAA-C02 All Questions

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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 254 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 254
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

An application is running on an Amazon EC2 instance and must have millisecond latency when running the workload. The application makes many small reads and writes to the file system, but the file system itself is small.
Which Amazon Elastic Block Store (Amazon EBS) volume type should a solutions architect attach to their EC2 instance?

  • A. Cold HDD (sc1)
  • B. General Purpose SSD (gp2)
  • C. Provisioned IOPS SSD (io1)
  • D. Throughput Optimized HDD (st1)
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by sctmp at Nov. 3, 2020, 3:01 a.m.
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etu2022
Highly Voted 3 years, 8 months ago
C : SSD-backed volumes include the highest performance Provisioned IOPS SSD (io2 and io1) for latency-sensitive transactional workloads and General Purpose SSD (gp2) that balance price and performance for a wide variety of transactional data. HDD-backed volumes include Throughput Optimized HDD (st1) for frequently accessed, throughput intensive workloads and the lowest cost Cold HDD (sc1) for less frequently accessed data.
upvoted 42 times
crazyaboutazure
3 years, 7 months ago
B as GP2 has millisecond latency and are smaller in size than Provisioned 1 TiB where Prov are min 4 TiB
upvoted 13 times
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yass18
Highly Voted 3 years, 8 months ago
C - High performance SSD volume designed for latency-sensitive transactional workloads
upvoted 20 times
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[Removed]
Most Recent 1 year, 10 months ago
Answer: C From ChatGPT For an application that requires millisecond latency and involves small reads and writes to the file system, you should consider using Amazon EBS Provisioned IOPS SSD (io1) volume type. This volume type is designed to provide high performance and low-latency storage for I/O-intensive workloads.
upvoted 1 times
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BECAUSE
1 year, 12 months ago
Selected Answer: C
C is the answer
upvoted 1 times
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Sachin032
2 years, 2 months ago
Selected Answer: C
For High I/O Io1 or Io2 is best option, the question not provide any information on number of io it just say io in that case SSD or io1 is also correct. As Io1 is better than SSD so will go for option C
upvoted 1 times
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YanisGTR
2 years, 3 months ago
small reads and writes to the file system, but the file system itself is small. so "B" Enough ,,,, why so many go with "C" ?!
upvoted 1 times
Mia2009687
1 year, 11 months ago
many reads and writes, I/O intensive, so Provisioned IOPS
upvoted 1 times
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sassy2023
2 years, 4 months ago
Selected Answer: B
B Requirement is millisecond latency. Gp2 seems to fit. “gp2 volumes provide single-digit millisecond latency” https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/general-purpose.html
upvoted 2 times
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Lavvvender
2 years, 9 months ago
Selected Answer: B
not mentioned HIGH IOPs
upvoted 1 times
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bora4motion
2 years, 10 months ago
Selected Answer: C
Should be C
upvoted 3 times
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spoty
3 years ago
Selected Answer: C
Low Latency -----> Provisioned IOPS https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html?msclkid=e9e58a88cf1911ec88cea06b074aff18
upvoted 2 times
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Ikenna198
3 years, 1 month ago
Selected Answer: C
https://aws.amazon.com/ebs/provisioned-iops/
upvoted 3 times
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alvaromg
3 years, 3 months ago
Selected Answer: B
No need for high performance
upvoted 1 times
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SmartDude
3 years, 3 months ago
Selected Answer: C
Due to higher number of IOPS we should choose C
upvoted 1 times
derekurizar
2 years, 11 months ago
lol where are they mentioning higher number of IOPS?
upvoted 2 times
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BlassArun
3 years, 5 months ago
C is the answer (io1 and io2 volumes are designed to achieve single-digit millisecond latencies)
upvoted 1 times
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manan728
3 years, 6 months ago
AWS exam options should phase out gp2 and replace with gp3 that has baseline of 3000 iops. The question says the vol size is small so with gp2 you are not going to get lot of iops a (iops = size GB * 3). Question should specify at least what is the io requirement and the vol size to expect a reasonable and valid answer. Its kind of vague.
upvoted 1 times
manan728
3 years, 6 months ago
From these FAQs it seems both io1 and gp2 provide single digit ms latency. Q: What level of performance latency can I expect to see from my General Purpose SSD (gp3 and gp2) volumes? When attached to EBS-optimized instances, General Purpose SSD (gp3 and gp2) volumes can achieve single digit millisecond latencies. Your exact performance depends on your application’s I/O requirements. Q: What level of performance latency can I expect to see from my Provisioned IOPS SSD (io2 and io1) volumes? When attached to EBS-optimized instances, Provisioned IOPS volumes can achieve single digit millisecond latencies. Your exact performance depends on your application’s I/O requirements.
upvoted 1 times
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gargaditya
3 years, 6 months ago
Its C. (1/2) Summary: st1/sc1 are -HDD -cannot be used as ROOT/boot volumes -125 GB to 16 TB storage -max iops 250(sc1) or 500(st1) gp2/gp3 are -SSD -1 GB to 16 TB storage -can be used as root volume -used for upto 16k IOPS(gp3 has baseline of 3k IOPS) -gp3 has option to scale throughput or IOPS independent of storage -SINGLE DIGIT millisecond latencies(upto 10 ms) io1/io2 are -SSD -4 GB to 16TB -can be used as root volume -used for upto 32k IOPS or 64K IOPS(nitro feature) -good for Database instance volumes -has option to scale throughput or IOPS independent of storage -SUPPORT EBS MULTI ATTACH -1 ms latency
upvoted 3 times
gargaditya
3 years, 6 months ago
(2/2) io2 Block express is -SSD -4TB to 64 TB storage -can be used a s root volume -used for offering over 64k IOPS -has option to scale throughput or IOPS independent of storage -SUPPORT EBS MULTI ATTACH -SUB-Millisecond latency Instance store -both HDD and SSD options -aim is temporary storage or -very high(1 million IOPS)
upvoted 2 times
gargaditya
3 years, 6 months ago
(2/2) correction on io2 block express limits. (2/2) io2 Block express is -SSD -4GB to 64 TB storage -can be used a s root volume -used for offering over 64k IOPS -has option to scale throughput or IOPS independent of storage -SUPPORT EBS MULTI ATTACH -SUB-Millisecond latency Instance store -both HDD and SSD options -aim is temporary storage or -very high(1 million IOPS)
upvoted 2 times
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ansarica
3 years, 6 months ago
millisecond latency, small read/write. so GP2 instance is good. B
upvoted 2 times
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