> Date: Fri, 13 Jun 2008 09:02:31 +0900 > From: Randy Bush <[EMAIL PROTECTED]> > > > The idea is to use tuned proxies that are close to the source and > > destination and are optimized for the delay. Local systems can move data > > through them without dealing with the need to tune for the > > delay-bandwidth product. Note that this "man in the middle" may not > > play well with many security controls which deliberately try to prevent > > it, so you still may need some adjustments. > > and for those of us who are addicted to simple rsync, or whatever over > ssh, you should be aware of the really bad openssh windowing issue.
Actually, OpenSSH has a number of issues that restrict performance. Read about them at <http://www.psc.edu/networking/projects/hpn-ssh/> Pittsburgh Supercomputer Center fixed these problems and on FreeBSD, you can get these by replacing the base OpenSSH with the openssh-portable port and select the HPN (High Performance Networking) and OVERWRITE_BASE options. I assume other OSes can deal with this or you can get the patches directly from: <http://www.psc.edu/networking/projects/hpn-ssh/openssh-5.0p1-hpn13v3.diff.gz> The port may also be built to support SmartCards which we require for authentication. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: [EMAIL PROTECTED] Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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