That snippet of text is from the 3.x documentation, where filling was
indeed a legacy feature. It's not present in the 4.x documentation, where
filling has another meaning and purpose.
Craig
On Wed, Nov 22, 2017 at 9:18 AM, Jamie Burchell <ja...@ib3.co.uk> wrote:
> "Filling backups takes a little extra disk space, and it does cost some
> extra disk activity for filling, and later removal. Filling is no longer
> useful, since file mangling and compression doesn't make a filled backup
> very useful. It's likely the filling option will be removed from future
> versions: filling will be delegated to the display and extraction of
> backup data."
>
> That's where I got "filled backups are more of a legacy thing from. i.e.
> the documentation.
>
>
>
> Hi,
>
> Jamie Burchell wrote on 2017-11-18 16:23:41 +0000 [[BackupPC-users]
> Documentation version discrepancies]:
> > As I've been learning backuppc and studying the documentation I
> > noticed that the documentation supplied in the Web UI is different to
> > what's currently online. This has undoubtedly contributed towards my
> > confusion as the terminology changes depending on which document I
> > happen to have access to when I'm looking.
> >
> > For example, this excerpt talking about full and filled backups. It
> > sounds like filled backups are more of a legacy thing too.
>
> quite the opposite, I believe. Filled backups didn't have much meaning
> before BackupPC 4.x.
>
> > Why not remove the docs from the web UI and point the menu to the
> > latest online docs? I know this can be done in the admin, I mean by
> default.
>
> Off the top of my head, I can think of two good reasons.
>
> 1.) Internet access is by no means a requirement of BackupPC. Supposing
> you
> don't have internet access, the reference to the online docs won't
> work.
> As long as you have access to the Web UI, documentation contained
> therein
> will always work.
>
> 2.) There are different versions of BackupPC in use, and as development
> continues, there will be more of them. Documentation may change as
> BackupPC changes and not be applicable to previous versions. While you
> *can* reference distinct online versions of the documentation, you
> gain
> exactly nothing. If you do that, you might as well distribute the
> online
> documentation you would want to reference with the BackupPC version it
> applies to.
> What you are probably thinking of is an evolving documentation that
> gets
> better while the installed BackupPC version stays the same. This
> evolving
> documentation would need to account for differences in BackupPC
> versions,
> thus becoming more and more complex and confusing - much the opposite
> from
> what you are trying to achieve.
>
> As for the pure information, there is simply so much of it out there, that
> people don't find (or don't read) what they are looking for. I've
> explained the difference between full and incremental backups here so many
> times, that I'm simply tired of repeating it when it comes up once again.
> In a nutshell, incremental backups are a trade-off of exactness for speed,
> invented in an era when it was simply not feasible to do daily
> (tape-based) full backups.
> There might be valid reasons even today for not doing full backups daily,
> but the apparent general attitude of "I don't need exact backups, I just
> need fast backups" begs for the answer "don't do any backups at all -
> that's as fast as it gets, and it's not much worse than inaccurate
> backups". Of course, your application may vary (and BackupPC incremental
> backups are in general reasonably accurate, presuming you are using
> rsync(d)).
>
> Regards,
> Holger
>
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