On Mi, 30 dec 20, 13:29:05, Marc Auslander wrote:
>
> IMHO, there are two levels of backup. The more common use is to undo
> user error - deleting the wrong thing or changing something and wanting
> to back out. For that, backups on the same system are the most
> convenient. And if its on the same system, and you have raid1, you
> don't need a separate physical drive.
>
> The second is of course disaster recovery, a very low probability
> event - and I backup in the cloud and occasionally on removable media
> for that.
What's the benefit of the "first" level if you also have the "second"
and is it worth the extra complexity?
The answer is yes, if my management deems the quicker turn-around on case 1 restores to be beneficial. Or beneficial for that particular server. We may be speaking of 2 different use cases: multi-tenant server versus dedicated backend server.
In my opinion a good backup system should be able to easily deal with
both use cases.
Honestly the only place I've found that to really truly work in practice at large scale is IBM's mainframe hierarchical storage systems. Note I said "at scale".