Trying to rsync a rather large file from a windows server to a centos server and all but this is working fine. As it's a 20 gig file I am trying to send the diff of with a -c, I suspect over the low bandwidth this presents an issue. I also stage this file locally on another centos server and could calc the diff and create a patch and send that, comparing checksums etc... A quick look at bsdiff and bspatch and the mem requirements on my 20 gig file make that solution rather not acceptable. Anyone know a better solution to accomplish this? Thanks! jlc