For those who don’t know SSH – Secure SHell – is a secure way of remote administration of a server through the command line. This was first used in Unix servers but has made it’s way to Linux and Windows, thanks to open source software.
There is also a different way to use SSH, to make a secure tunnel between a client and server for transferring files. This is known as SCP. The biggest downfall with SCP is that it relied on SSH which by nature was slower because of the computation of the encryption. Now since machines have been getting more powerful, and bandwidth getting faster this downfall is prominent. So the Advanced Computing Group have made improvement to the core of SSH. These improvements were to the flow control buffers, the main bottleneck of the SSH protocol. The new implementation of HPN-SSH now defines the buffers at run-time, meaning the buffers can be increased as long as the link between the server and client is healthy.
The Advanced Computing Group claims to be able to improve the throughput by as much as 1000% just by increasing the buffer size. The group also made available patches to the popular OpenSSH software. I have yet to try this patches but as far as I can tell this looks to be very promising.