[lug] dd ssh pipe to bzip?

[George Sexton]

> -----Original Message-----
> From: lug-bounces at lug.boulder.co.us [mailto:lug-
> bounces at lug.boulder.co.us] On Behalf Of Davide Del Vento
> Sent: Wednesday, November 17, 2010 4:47 PM
> To: Boulder (Colorado) Linux Users Group -- General Mailing List
> Subject: Re: [lug] dd ssh pipe to bzip?
> 
> >  dd if=/dev/mapper/VolGroup00-LogVol00 | ssh -Te none offsite at dev -i
> >   /root/.ssh/id_dsa_offsite "bzip2 -c > gw2.iso.bz2"
> >
> > If a data file happened to contain the magic escape sequence your SSH
> > session would get dumped to a > prompt.
> 
> I wonder why not using scp instead.

In general, because you can avoid a write cycle. If I want to backup a
directory to a remote host, then I can send it directly to the remote host
without writing it to my disk subsystem. My experience has been that it's
much faster to backup across 100MB Ethernet in this way than to backup to a
USB flash drive.




George Sexton
MH Software, Inc.
303 438-9585
www.mhsoftware.com