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When launching a new EC2 instance with EBS (especially the new C4 instance), which one is better? Assuming I need to provision 300 GB total.

  1. 1 single 300 GB EBS storage to get 900 IOPS (General Purpose SSD) or

  2. 3 EBS storage with 100 GB each and get 300 IOPS (General Purpose SSD) only for each storage?

Any idea?

user1576748
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1 Answers1

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Option 1 will give you faster performance and better reliability. With 3 EBS volumes you need to stripe them to make a single one and a failure on any of the three will result in a complete failure of all.

nnahum
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  • With 3 storage, I can mount it as xvda, xvdb, xvdc. If one disk fails or corrupt, at least the others 2 are not. With one single storage, if the disk fails or corrupt, I might lose all the data. – user1576748 Apr 02 '15 at 17:42
  • ok, I thought you wanted to present a single filesystem of 300GBs, and you wanted to stripe the 3 EBS volumes at the EC2 level. – nnahum Apr 03 '15 at 17:23