> Hello,
>
> I built a BackupPC server with good older hardware and installed two WD
> RED
> 3 TB drives and used  LVM to make them one big ~6 TB volume for backupPC.
> The system boots from a separate disk BTW. I am backing up teacher and
> student files for a small school district. The total backup before pooling
> and compression is around 800GB. My pool size is around 1TB with a months
> worth of daily incremental and full backups on Fridays. I did not realize
> when I built the server how amazingly efficiently BackupPC stores the
> backups. I did not anticipate being able to keep so many backups!
>
> Is there any reason not to just increase the full and incremental keep
> count to a something like the whole school year? Another though is to keep
> the fulls and incremental for maybe 3 months then let the incremental go
> and just keep the weekly fulls? So that's the question, if I have plenty
> of
> space is there any reason not to just keep a ton of backups?
>
> Thank you!
> David Nelson

Well, yes.  The first one is the apparent lack of media redundancy in your
backup system -- the possibility that one of those 3TB drives is going to
fail at some point would lead me to suggest that you're probably better
off reconfiguring the array as a 3TB mirror and saving yourself a ton of
headaches rather than expecting your entire backup system to potentially
disappear one day and need to be recreated from scratch.  This is likely
to occur at the worst possible moment.

Otherwise, the change patterns in your files -- and your recovery patterns
-- will dictate what's most sensible in terms of what makes sense to keep
for fulls and incrementals.  Is it often necessary to go back to previous
versions of files, or, like most of us, do you usually want the latest
revision?

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