Re: [GENERAL] "Resurrected" data files - problem?

From: Albe Laurenz <laurenz.albe(at)wien.gv.at>
Date: Thu Nov 08 2007 - 10:47:43 EST

Peter Childs wrote:
>> We use a tape backup software that does "incremental backups"
[...]
>> So if we perform our database backups with incremental
>> backups as described above, we could end up with additional
>> files after the restore, because PostgreSQL files can get
>> deleted (e.g. during DROP TABLE or TRUNCATE TABLE).
>>
>> My question is:
>>
>> Could such "resurrected" files (data files, files in
>> pg_xlog, pg_clog or elsewhere) cause a problem for the database
>> (other than the obvious one that there may be unnecessary files
>> about that consume disk space)?

>
> This will not work at all.

Can you give me a good reason why?

> Try re-reading the instructions on backup in the manual.

I know them well. That is why I ask if this questionable procedure could lead to damage.

Yours,
Laurenz Albe

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TIP 5: don't forget to increase your free space map settings Received on Thu Nov 8 11:52:22 2007