Pdshisahigh-performance,parallelremoteshellutility.Ithasbuilt-in,thread-safeclientsforBerkeleyandKerberosV4rsh,andcancallSSHexternally(thoughwithreducedperformance).Pdshusesa"slidingwindow"parallelalgorithmtoconservesocketresourcesontheinitiatingnodeandtoallowprogresstocontin