[Beowulf] High Performance SSH/SCP
ed at eh3.com
Thu Feb 14 10:01:16 PST 2008
On Thu, 14 Feb 2008 12:33:57 -0500 (EST) "Robert G. Brown" wrote:
> >> Any idea if the openssh people are going to incorporate the patch
> >> permanently? Any hope of replacing the "Ciphers none" option
> >> (even with
> > I think they've permanently rejected it.
> Grrrr. Do the PSC folks plan to put their code into e.g. F8 as a
> fork/option? It is so easy to yum install X, so big a pain to hand
> build an rpm to install as an alternative and then have to hand
> maintain thereafter as e.g. security fixes come out.
Fedora's policy is to closely follow upstream. Its *very* unlikely
that Fedora will ever accept patches that the official OpenSSH
Hopefully the PSC folks (or other parties) can convince the OpenSSH
maintainers to allow some options (dynamic buffers, disabled encryption
of the non-handshake payload, etc.) that result in higher-bandwidth
ps - For ssh transfers over long distances (high-bandwith and high
latency) one can break the data up into pieces and run multiple
ssh transfers in parallel. Transmitting terabyte data sets from
the West Coast to the East Coast over Abilene I've seen >10X
speedups (that is, >10X the overall throughput) when running
15--20 simultaneous ssh sessions.
Edward H. Hill III, PhD | ed at eh3.com | http://eh3.com/
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