help with 'tar|rsh tar'
xfb52 at dial.pipex.com
Mon Jun 26 10:39:38 UTC 2006
Nikolas Britton wrote:
> I need to backup the /data directory on hostA to /data on hostB, about
> 1TB of data on a gigabit link. Right now I'm using scp but the
> handshake latency and ssh overhead is killing me.
Try openssh-portable from ports and set these two:
HPN "Enable HPN-11 SSH/SCP patch" off \
HPN_NONECIPHER "Enable HPN-11 with None Cipher patch"
Then use "scp -z" to do the copy. You need this version of ssh at both
ends for -z (no data encryption) to work. HPN improves the performance
of ssh no end on internal gigabits. No idea if it will match the ttcp
solution, but much safer than enabling rsh :-)
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