Amanda-Users

Re: a bit off topic but ...

2003-03-12 14:28:17
Subject: Re: a bit off topic but ...
From: Paul Bijnens <paul.bijnens AT xplanation DOT com>
To: Lars Segerlund <lars.segerlund AT comsys DOT se>
Date: Wed, 12 Mar 2003 18:53:21 +0100
Lars Segerlund wrote:

 I was wondering how amanda estimates the backup size ?

is there a switch to tar to estimate the archive size without generating the file ?

For the estimate phase Amanda uses the "--file /dev/null"  option
of gnutar, and gnutar has a special optimisation that if it detects
output to /dev/null, it will actually not read any bytes of files, but just make statistics.
For samba clients it uses the builtin "du" command of smbclient (if
your smbclient version is recent enough).

--
Paul Bijnens, Xplanation                            Tel  +32 16 397.511
Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM    Fax  +32 16 397.512
http://www.xplanation.com/          email:  Paul.Bijnens AT xplanation DOT com
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