looking to induce high i/o read/wait for testing
I have some systems which are seeing a high I/O wait (in iostat -x, very high rsec/s). I have some parameters in mind for improving this, but currently I can't modify the systems directly. I was wondering if anyone could recommend a method (perhaps some sort of benchmark tool) which would artificially induce high I/O wait on a spare system so that I could try tinkering.
I'm using CentOS 6.0 in a vmware/ESX environment, if that helps.