[TriLUG] IDE Hard disk limitations BIOS and Linux

[Jeremy Portzer]

On Tue, 21 Dec 2004, Rick DeNatale wrote:

> Jeremy wrote a note a few months ago in which he analyzed the
> efficiency of rsbackup for backing up home directories in terms of how
> big the multiple backup generations were compared to how big they
> would be without the hard link magic.  I'm curious as to how much
> bigger a multiple generation  rsbackup of say the /home directory to
> the size of the /home directory itself?

The efficiency is largely dependent on how often files change, and what 
types of files are changing.  It's ineffecient for log files because they 
get a little bit added on continually, and can become large, and a new 
copy must be backed up for each iteration.  In general home directories 
should be more efficient since a lot of your files probably don't change 
on a given day.

As far as how much space to allocate for your backup partition, I'd say 
roughly twice the amount you wish to back up would be more than safe for 
rsback.  If your files don't change much you may only really need 1.1x or 
1.2x... I think the trilug rsback setup is using about 1.5x.

Hope this helps,
Jeremy

-- 
/---------------------------------------------------------------------\
| Jeremy Portzer        jeremyp at pobox.com      trilug.org/~jeremy     |
| GPG Fingerprint: 712D 77C7 AB2D 2130 989F  E135 6F9F F7BC CC1A 7B92 |
\---------------------------------------------------------------------/