Re: Problems disk usage after migrated/reinstalled from 3.3 to 4.4

Hi there,

On Mon, 8 Dec 2025, klxout wrote:
> G.W. Haywood wrote:
>>
>> Is the current value of seven days causing problems for you?  I can
>> only imagine that it would be a problem if you are backing up a large
>> number of large files of which most change frequently.
>>
>> Backing up the files underlying the tables in a database system for
>> example might be expected to cause issues.  In my view BackupPC is not
>> particularly suitable for that kind of backup.  My own database
>> servers are backed up using the Postgress dump utility via cron jobs.
> 
> Correcte in my case I have many big files, postres backups,
> why is restricted to 7 days on v4?

Short answer: nobody seems to be sure.

Long answer: Read the comments in the Github issues.  In

https://github.com/backuppc/backuppc/issues/310

BackupPC's author says he doesn't know.

There's more in

https://github.com/backuppc/backuppc/issues/418#issuecomment-912967000
https://github.com/backuppc/backuppc/issues/427

> It is possible to recover v3 feature que keep less days? Now?

Yes.  See

https://github.com/backuppc/backuppc/issues/418#issuecomment-848610992

But none of this changes the fact that BackupPC is not a good choice
for backing up typical large database files.  BackupPC's pooling will
have no effect on a file in which even a single bit changes, so if you
have large files with few but frequent changes, BackupPC must store a
new copy of the file every time it's backed up.

For my own Postgres backups I use the dump utility and cron.

-- 

73,
Ged.


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