3 ms·

I don't understand why you think utilising RAID across EBS volumes is insane. For years, if people needed more IOPs than a single drive could deliver, they util

• rickmb 14y ago
  Even people who operate on a much smaller scale need consistent, fast performance. For them, the whole effort and cost of setting up RAID across multiple EBS instances, measuring and dropping the slowest performance constantly is completely insane compared to the disadvantages of buying or renting dedicated iron.
• cagenut 14y ago
  Because EBS has astonishing variance in its response times that cause the entire raidset to have very inconsistent performance. Numbers here: http://www.mysqlperformanceblog.com/2011/02/21/death-match-ebs-versus-ssd-price-performance-and-qos/ http://www.mysqlperformanceblog.com/2011/02/21/death-match-e... In order for raid-on-ebs to truly perform well you have to setup per-volume monitoring that ejects volumes from the raidset (and runs in degraded mode) when they start performing 10x worse, and then rebuilds the back on to it (or a new one) later. It becomes a rather arcane wizard work contraption of on-the-fly raid config changes, which IMHO qualifies as "insane".