help with 'tar|rsh tar'

Alex Zbyslaw xfb52 at
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"  
off \

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 :-)


More information about the freebsd-questions mailing list