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| How FIFO is Amazon's SQS? - Pretty FIFO by Lost at 5:26 am EDT, Sep 6, 2008 | |||
Star Caller makes use of the Amazon Cloud, so I wanted to know just how FIFO the Amazon Simple Queue Service is. Amazon says that the SQS is not FIFO. So I (with hobbs from #catalyst) wrote a script to test the SQS's Spearman's rank correlation coefficient between set order and get order.The results for 1000 gets/sets to the queue usually look something like this: SAD: 42.04 The data is plotted for 1000 inserts/gets, with a 0 second delay between the finish of get/set here:  So far, a delay between the sets and gets seems to have no effect on FIFO-ness, but the rate of sets may. The results? Its pretty FIFO. Not completely ordered, but its in a distributed cloud so that would be quite hard. How much did the tests cost me? 29,021 Requests: $0.03 | |||
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