I've been using iozone for a few years now to measure disk I/O performance. My version was getting old, so I downloaded a more recent version and I noticed that it comes with a nifty perl script named iozone_visualizer.pl that ties it with Gnuplot to produce very interesting graphs. It's quite useful when you want to compare multiple systems,or different tunables and you no longer need to use Excel. Yes boys and girls, the best things in life are free.
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