Jetter: a multi-pattern parallel I/O benchmark

This paper proposes a new multi-pattern parallel I/O benchmark called Jetter, which evaluates parallel I/O throughput with either the contiguous I/O pattern or the non-contiguous I/O pattern, in either the share-one-file model or the file-per-process model, by either the POSIX interface or the MPI-I/O interface. Jetter helps end users make sense of the pattern performance law, and helps them develop efficient applications in a platform. We have evaluated the parallel I/O bandwidth in a 32 CPU shared memory computer with Jetter. The results show that I/O pattern determines throughput. Optimizing I/O model, interface, etc. in a pattern will improve bandwidth 2 or 3 times.