X-Spam-Check-By: sourceware.org To: cygwin@cygwin.com From: "Cary Jamison" Subject: Re: How to improve scp speed? Date: Wed, 30 Nov 2005 12:55:28 -0700 Lines: 23 Message-ID: References: <61f6f4390511281238o1e512ef8i14647828fcf32c@mail.gmail.com> <438D6EE0.1000406@gmx.de> X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com In news:438D6EE0.1000406@gmx.de, Holger Krull typed: > The low speed of ssh and scp is not because of the encyption. > The problem is the 64K limit for the window size in the protocoll. > Further information and a patch can be found here: > > http://www.psc.edu/networking/projects/hpn-ssh/ I think we all know that encryption is a factor. The site still states : The improvement will also be highly influenced by the capacity of the processor to perform the encryption and decryption. Less computational expensive ciphers will often provide better throughput than more complex ciphers. And they add a new '-z' switch to get higher throughput without encryption. But, it is interesting to see how much more throughput they get with their buffer tuning. Cary -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/