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It is important to realize that these numbers are very, very low. Amazon's architecture has always been particularly terrible at running Redis, and the fact that they gave it a brand name has not changed that.

antirez's "How fast is Redis?" page (http://redis.io/topics/benchmarks) draws some attention to the fact that Redis gets much slower when virtualized. He mentions that a state-of-the-art VMware hypervisor will cut Redis's performance by a factor of two.

EC2's performance is considerably worse than a state-of-the-art hypervisor.

For comparison, I just ran the same benchmark the article describes on the desktop PC I'm currently using to post this. It cost me $800, last year, and that includes the video card. It gets an average of 881,670 OPS, which is over ten times faster than an m2-2xlarge machine in this benchmark.

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