Re: [BackupPC-users] Re: BackupPC-users digest, Vol 1 #542 - 5 msgs

[daniel.poelzleithner <po...@po...>]

Julian Robbins wrote:

> We have a number of removable harddrives in our backup PC connecting
> to a file server and another standalone pc. Both the server and standalone
> PC require backing up nightly. i.e.
> 
> _______                  _________
> |      |                 |BackupPC|
> |Server| _______________ |        |
> |____ _|                 |________|
>                           |
>                           |
> _____                     |
> |   |                     |
> | PC|----------------------
> |___|
> 

Using Rsync is faster then mounting the filesystem localy, but both is 
supported.

> We have 5 separate Hard disk drives, these are at the moment labelled Mon, tues,
> weds, Thurs, Weekend. We require full backups perhaps once a week, and
> incremental ones nightly. We also require permanent backups stored,
> say, once a month that are kept ad infinitum.
> 
> How does the Pooling work when the file that is pooled might be on
> yesterday's drive ??

A filesystem like reiserfs is a Database :)
It works over hardlinks.

> I might be wrong but I'm hoping that it uses a database to store the
> pooled info rather than quizzing the previous backup media for the
> existence of a 'same' file. If its a DB then I think we should be ok.

It hardlinks files already existing in the shared pool to the new backup.

The nightly cleanup removes directorys which are outdated and then 
removes every file from the pool which has only one link at it.

> Does anyone have any experience of using backupPC using Hard
> drive media nightly like this ?? Is there any issues to be aware of ?
> We are using a caddy and will set up some kind of power down/power up
> to allow us to swap HDD units.

It does not, and i think it will never do.
You can use one drive a permanent Backup medium and save this to your 
removeable harddisks.

Raid would increase the security.

regards
  Daniel