Puppet

Carl, seems like this might me in your area to investigate.

There shouldn’t be any huge reduction in performance due to Ruby, but obviously this is a bit slow, so something is strange. All the encryption is done in C, using OpenSSL, which should knock that out of the picture – so unless our Ruby agent or master is doing something painful in streaming the content, it should be just about as efficient as the pure C scp.

It could, perhaps, be that we don’t use zlib compression on our connection, while scp can – if the 5GB was highly compressible, that might explain the difference. I get ~ 13 to 16 MB per second with the quoted rate for scp, which would push the limits of 100Mbit Ethernet, but would be reasonable on gigabit.