IO Performance

Hi all,

I'm considering using and benchmarking a network of BeagleBoards as a
platform for running MapReduce workloads (such as those generated by
Hadoop) and I was wondering if anyone has measured the read and write
speed of the beagle board over the MMC/SD port or USB port? I want to
make sure the IO performance is reasonable before I make an investment
in this platform.

Thanks in advance,
Justin