I usually recommend iozone and fio. Iozone isn't the most powerful tool, but it's simple to use and with the right options can at least provide some useful inf

I usually recommend iozone and fio. Iozone isn't the most powerful tool, but it's simple to use and with the right options can at least provide some useful information. Fio is much more powerful, in terms of the workloads it can generate and the information it can provide, but it's a real PITA to work with. As it turns out, I've given a few presentations on this stuff. Here's one of the more recent ones: https://docs.google.com/presentation/d/1CQgn_fXivdXZ-fcqJ39v09uQUcIeQQMILma9Hd-cJj8/edit#slide=id.p4 https://docs.google.com/presentation/d/1CQgn_fXivdXZ-fcqJ39v...