BackupPC-users

Re: [BackupPC-users] Outsourcing backup

2010-05-04 13:03:03
Subject: Re: [BackupPC-users] Outsourcing backup
From: Inno <innop AT voila DOT fr>
To: General list for user discussion questions and support <backuppc-users AT lists.sourceforge DOT net>, backuppc-users AT lists.sourceforge DOT net
Date: Tue, 4 May 2010 19:01:22 +0200 (CEST)
I can do a full backup that I archive and incremental rsync every night. Why 
not if the rate of change in the content it's good. I will look at how much 
data changes each day.

> Message du 04/05/10 à 18h14
> De : "Les Mikesell" <lesmikesell AT gmail DOT com>
> A : backuppc-users AT lists.sourceforge DOT net
> Copie à : 
> Objet : Re: [BackupPC-users] Outsourcing backup
> 
> 
> On 5/4/2010 10:42 AM, Erik Hjertén wrote:
> > Les Mikesell skrev 2010-05-04 14:50:
> >> Inno wrote:
> >>
> >>> I have not a decent internet connectivity and I have more than 500 GB.
> >>>
> >>>
> >> With rsync the size doesn't matter much after you get the initial copy 
> >> (which
> >> you might take on-site and carry over or let it run over a weekend).  The
> >> bandwidth/time you need nightly would depend on the rate of change in the 
> >> content.
> >>
> > "The size doesn't matter much" - Is this true even if he runs fulls
> > every week? Or is it only true for the incremental runs?
> 
> Smb/tar methods fulls transfer the entire content.  Rsync methods 
> compare the previous full to the current content and only transfer the 
> differences.  The difference between rsync fulls and incrementals is 
> that incrementals completely skip files where the timestamp and length 
> match the previous copy and fulls do a block checksum comparison in a 
> way that does not exchange much data where the parts match.
> 
> -- 
>    Les Mikesell
>     lesmikesell AT gmail DOT com
> 
> 
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