Let’s peer into the Java development team that started down the path of writing the surveillance application starting from the baseline Java 5 JDK. First, they looked at the edit distance code and calculated that it would have to run against 50,000 transactions/min x 10 min. x 1,000 names = half a billion iterations of the algorithm or 800,000/second. Gasp.
Well, running the edit distance POJO on half a billion in-memory comparisons yielded a pretty good result on the 8-core server – 13 minutes, only 3 minutes off the mark, right? “Wrong,” said the compliance officer, as he reminded the team about next year’s doubling of volumes, about the 15-minute notification requirement, and about the fact they still haven’t factored in the location clustering using K means nor the I/O overhead. Half the team went to work tuning the JVM, while the other half cracked open Java concurrency books and started studying…
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