On Thu, Jul 19, 2012 at 08:08:26AM +0200, Jan Stary wrote: > > have you also tried -o 'Compression no'? >
I have now. No real difference; SSH Options: [-o Ciphers=arcfour -o Compression=no] 64.68132476895114469583 MB/s 63.56096147431307883010 MB/s 61.69097005503488103824 MB/s 61.41473507203868873527 MB/s Data in the range of many terabytes, possibly up to petabytes are expected to go over the link, so the hpn-ssh patch used by HPC sites looks like the most viable for this - thanks, Michael. Dan, yes the 4 ssh processes were at 100% cpu, I guess with the encryption overhead. Both client and server are 8 core. There was no other load at the time of testing, so half cores are available to service disk and network load.
