Re: [BackupPC-users] Only Incremental Backups

Bowie,

Thanks for answering!

I have one full backup of my client but the internet is very slow ... and is taking too long to finish the backup.

I need to have one complete backup and others partials, how can i do that?!

My problem is that: i do that by the internet, it is 20GB of data and my client have a link with 512k upload and here i have 10MB of download.

The method used is rsyncd.

Atenciosamente,

Guilherme Cunha

Administrador de Redes e Sistemas

Telefones: (53) 8456-2811 (53) 8115-3991 (53) 3028-6788

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2014-04-24 9:59 GMT-03:00 Bowie Bailey <Bowie_Bailey AT buc DOT com>:

On 4/24/2014 1:24 AM, Guilherme Cunha wrote:

Hi !

How do I run only incremental backup?

You don't. Full backups are necessary at some reasonable interval for a couple of reasons.

1) Incrementals are based on the last full backup. So your incremental backups will keep getting bigger and bigger until you run another full backup. And, even with rsync, the network usage will also continue to grow.

2) Incrementals decide what to back up based on timestamps. This can lead to files being missed in some circumstances. For example, files that were moved to a different location without changing timestamps, or files that were moved/restored from elsewhere while maintaining an older timestamp. An occasional full backup will make sure these files get backed up.

3) If you are using rsync, then a full backup will not take any more network bandwidth than an incremental. It will take longer because of the need to actually compare each file, but only the changes will be transferred across the network.

4) Due to the pooling features of BackupPC, a full backup does not take up any more hard drive space on the server than an incremental.

What are you trying to accomplish by only running incrementals?

--
Bowie

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