HI, First to the 709 MB/sec. Please read the answer from joe, there is nothing more to say about it. But tree-copy-rsync sounds very interesting. We have tested stuff like msync, a multicast rsync tool, but it seems msync does loose to many connections and you got trouble with corupt data. We also played around with mpi I/O to copy files, but this seems to be very slow. Is there someone brave out there with pvfs2 performance results? Regards -- Rene Storm software engineer