The problem with doing a clone on the file-system level is that it takes
way too much space. You might have a system that has 300G file system
and has only 5G of useful data. Even compressing the file system image
will not save you that much space (unless you write zeros to the unused
space on the file system before you archive and compress it).
Doing cloning via tar or cpio on the file level is much more economical.
Only space that is used will need to be archived and compressed. This
kind of approach will let you restore to not exactly the same system.
Let's say that the new system has two smaller drives instead of one big
one. This approach can work around that. Or maybe the destination drive
is a bit smaller than the source drive but all data will fit, this
approach can work with that too.
Doing things on the file system level has quite a few restrictions?
Maybe there is a way to shrink down the file system before it was
archived and expand it to needed size during the restore process.
-Georgi
-----Original Message-----
From: cobbler-bounces(a)lists.fedorahosted.org
[mailto:cobbler-bounces@lists.fedorahosted.org] On Behalf Of Michael
DeHaan
Sent: Thursday, July 31, 2008 6:56
To: cobbler mailing list
Subject: Re: More details on system imaging -- livecd based proposal
All that said, I am perhaps not the target for cobbler; the
increasing power of cobbler et al is far beyond my needs, as I've not
really changed how I've been doing things since 0.3.3 when I started
using it.
It seems as you are talking about tar you really don't understand the
use case we are trying to solve.
Think about arbitrary cloning of arbitrary operating systems, at the
filesystem level, not "tar".
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