PostMark is the benchmark used in the NetApp Technical Report TR-3022, "PostMark: A New File System Benchmark". The paper fully explains how to use this tool. From the paper's Abstract: Existing file system benchmarks are deficient in portraying performance in the ephemeral small-file regime used by Internet software, especially: * electronic mail * netnews * web-based commerce PostMark is a new benchmark to measure performance for this class of application. -- David (obrien@cs.ucdavis.edu)