SUMMARY: Slow transfers on remote backup

From: James Rae (rae@decux.nvg.com)
Date: Thu Sep 09 1993 - 04:14:59 CDT

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Sun Managers
My original question was as follows:
>Hello Sun Managers,
> I am using tar to back-up a large file system in a remote site (actually
>4 states away) via a T1 connection and my question is this. Does anyone
>know the optimum settings for the tar command to maximize transfers across
>a T1 connection. I have almost 3GB of data and at the present it takes just
>short of 10 hours to complete the backup. I'm running out of night, if you
>know what I mean. I would be happy to summarize, of course!!

Thanks to:
hushing@gdwest.gd.com (Sumner Hushing)
Charles A Finnell <finnell@portia.mitre.org>
ktm@cs.rice.edu (Ken Marshall)
horns@nwtss1.eq.gs.com ( Steven Horn)
jayl@lattice.com (Jay Lessert)
jimc@jts.com (Jim Carroll )
jamest@sybase.com (James Terry)
feldt@phyast.nhn.uoknor.edu (Andy Feldt)
kmah@DCS-Systems.COM (Kevin Mah)
larry@ma.pdc.com (Larry Freeman)
Peter.Samuel@nms.otc.com.au (Peter Samuel)
peterg@murphy.com (Peter Gutmann)
Birger.Wathne@vest.sdata.no (Birger A. Wathne)
abeckett@fmlrnd.co.uk
Roland Kaltefleiter <kaltef@solid.theo-physik.uni-kiel.d400.de>
shandelm@jpmorgan.com (Joel Shandelman)
davis@udecc.engr.udayton.edu (Thomas J Davis)

Most people suggested that I use compress to reduce the amount of data that
I have to send through the line using a comand similar to:

I am presently testing this with limited success (about 14% increase in
performance on my initial benchmarks).

Also a special thanks to Ken Mashall (ktm@cs.rice.edu) for sending me a copy
of the buffer program. I haven`t had a chance to try it yet but it is my
next project.

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