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A comment on Disk IO and throughput benchmarks on Amazon's EC2.

Re:Disk IO and throughput benchmarks on Amazon's EC2 by jedberg on Wednesday December 09, 2009 @04:15PM (#986598)
We use EBS for all of reddit's databases. We occasionally run into IO limits when doing a vacuum, but that is about it.
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Re:Disk IO and throughput benchmarks on Amazon's EC2 by aolnerd on Wednesday December 09, 2009 @04:36PM (#986639)
Do you RAID them? What size instances do you use? EBS seems susceptible to poor performance when there is contention on your instance's shared network card or contention on the EBS device itself.

Vacuums use sequential IO, so it makes sense that you max out pretty quickly.

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Re:Disk IO and throughput benchmarks on Amazon's EC2 by jedberg on Wednesday December 09, 2009 @04:44PM (#986662)
> Do you RAID them?

No

> What size instances do you use?

Databases are m1.xlarge.

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