On Jan 24, 2006, at 9:10 PM, Ow Mun Heng wrote:
On Tue, 2006-01-24 at 17:23 +0000, Francesco Riosa wrote:
Jeff wrote:
Hey guys.
I've got this big fat backup server with no space left on the
hard drive
to store a tar file. I'd like to pipe a tar through ssh, but not
sure
what the command would be. Something to the effect of:
# cat /var/backup | ssh backup.homelan.com 'tar data.info.gz'
So that, the data is actually being sent over ssh, and then
archived on
the destination machine.
tar -zcf - /var/backup | ssh backup.homelan.com "( cat >
data.info.gz )"
There's another way. This assumes your originating server's CPU is
slow/precious and you have a 16 way node on a backup server (HAHA!!)
tar cf - /var/backup | ssh backup.homelan.com "gzip -c >
filename.tar.gz"
But you transfer the stream uncompressed, so more bits get
transferred.
you're kidding, right? Unless you've got a PII on the originating
end and are using gigabit ethernet between the two nodes, compressing
the data before transmission will almost always be faster. I tested
this scenerio extensively about 3 years ago, using linux, aix, and
solaris hosts. In no case was transferring uncompressed data faster
than compressing (at least to some degree) the data on the
originating server. And frankly, no matter what you do...wouldn't
you hope ALL the bits get transferred? :)
--
Ow Mun Heng
Gentoo/Linux on DELL D600 1.4Ghz 1.5GB RAM
98% Microsoft(tm) Free!!
Neuromancer 11:10:24 up 11:00, 6 users, load average: 1.08, 1.04, 1.15
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