Makes sense to run 2U servers; more room for independent disks; no RAID, no redu... | Hacker News

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toomuchtodo on March 15, 2012 | parent | context | favorite | on: Amazon Data Center: 450,000 Estimated EC2 Servers

Makes sense to run 2U servers; more room for independent disks; no RAID, no redundancy, 1 disk per virtual machine "slice", so you don't have contention issues when someone else on the box tries to do a dd from EBS to the local non-persistant disk.

1U pizza boxes wouldn't have enough physical drives to break up among the amount of virtual machines you can cram on a box with 64-128GB of RAM.

timc3 on March 15, 2012 [–]

You honestly think you get a disk per instance? Or that a node needs a disk?

toomuchtodo on March 17, 2012 | [–]

Based on non-persistant disk IO tests on an EC2 instance, yes, it appears you are getting a raw disk.

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