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ayufan / pve-patches

Repository with public Proxmox patches
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Question for you Kamil.. #15

Closed abclution closed 5 years ago

abclution commented 5 years ago

Big fan, your patches are a huge improvement to proxmox backup system and hugely appreciated.

My question is, for your own use, how many differential backups do you use before taking a new full backup, personally?

I understand the risk that each previous differential file is need to restore a machine up till the point one wishes to restore to, but if each diff backup (as well as the initial full) is backed up and securely stored (zfs) as well, is it feasible to do 1 full per year? What do you personally do?

ayufan commented 5 years ago

Full backup every week, and as many differentials as needed.

To restore you need full backup and latest differential. The situation that you describe is incremental backups.

Yes, it is feasible, but it is also very likely that your differential will grow over time, as amount of data changed compared to full backup will be substantional.

abclution commented 5 years ago

Hi thanks for the reply. I found out I am actually limited via the GUI to a maximum of 60 (Full Backup Every)

Yes you are right, essentially if the aggregate changes of all diff snapshots exceed a certain amount, a full backup is a better choice.

I was trying to setup a daily full (but only stored changed data) with a combo of your patches and borg backup. Many of my vms I don't move very much data in and out so the diff would be fairly predictably small.

"As many differentials as needed" Differential backups need to be called by the backup scheduler right? They cannot be run via the gui on as needed basis can they?

ayufan commented 5 years ago

Yes. Diffs are run on schedule

On Fri, 8 Mar 2019 at 21:38, abclution notifications@github.com wrote:

Hi thanks for the reply. I found out I am actually limited via the GUI to a maximum of 60 (Full Backup Every)

Yes you are right, essentially if the aggregate changes of all diff snapshots exceed a certain amount, a full backup is a better choice.

I was trying to setup a daily full (but only stored changed data) with a combo of your patches and borg backup. Many of my vms I don't move very much data in and out so the diff would be fairly predictably small.

"As many differentials as needed" Differential backups need to be called by the backup scheduler right? They cannot be run via the gui on as needed basis can they?

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abclution commented 5 years ago

Thanks, appreciate your time.