Farkas Levente wrote: > hi, > is there any plan to include High Performance SSH/SCP - HPN-SSH into > fedora's ssh? > http://www.psc.edu/networking/projects/hpn-ssh/ I noticed that for scp if you disable compression (yes disable), then transfer rate increases a lot. I looked at it very quickly and it seemed worse the more the data compressed. Also Protocol=1 seems much better: dd bs=1M count=50 if=/dev/zero of=50MB_zeros dd bs=1M count=50 if=/dev/urandom of=50MB_random $ scp localhost:50MB_random /tmp 50MB_random 100% 50MB 10.0MB/s 00:05 $ scp -C localhost:50MB_random /tmp 50MB_random 100% 50MB 4.6MB/s 00:11 $ scp -C localhost:50MB_zeros /tmp 50MB_zeros 100% 50MB 2.3MB/s 00:22 #setting Protocol=1 in sshd_config I get the following speed: $ scp -C localhost:50MB_zeros /tmp #Includes time to type password! 50MB_zeros 100% 50MB 12.5MB/s 00:04 When talking about improvements to ssh, chrootssh seems useful: http://chrootssh.sourceforge.net/ Also upstream openssh breaks X forwarding in interesting ways unless -Y is specified (at least fedora fixes this). Also scp does full remote login etc. even if local specified files don't exist Also scp has weird error messages: $ scp /etc/fstab localhost:/non_existent/ scp: /non_existent/: Is a directory Don't get me started... Pádraig. -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
