Re: Problem with PITR recovery

On Mon, 18 Apr 2005, Simon Riggs wrote:

> On Mon, 2005-04-18 at 13:41 -0400, Bruce Momjian wrote:
>> Tom Lane wrote:
>>> Bruce Momjian <pgman@candle.pha.pa.us> writes:
>>>> I guess I didn't see the connection between the file system backup and
>>>> the WAL files, when in fact you need the WAL files that go with the file
>>>> system badckup to do the recovery.  Do you have new suggested text?
>>>
>>> I think it probably needs to mention *both* the tar dump and the WAL
>>> segment file(s).  I can take a whack at it if you like.
>>
>> I modified the sentence to say:
>>
>>     Once you have safely archived the file system backup and the WAL segment
>>     files used during the backup (as specified in the backup history file),
>>     you can delete all archived WAL segments with names numerically less.
>>
>> Feel free to whack it a second time.
>
> whack...
>
> ...you can delete all archived WAL segments with names numerically
> less.
>
> but I'm not sure it's best practice to delete them at that point. I
> would recommend that users keep at least the last 3 backups. So, I'd
> prefer the wording
>
> ...all archived WAL segments with names numerically less will no longer
> be needed as part of that backup set. You may delete them at that point,
> though you should consider keeping more than one backup set to be
> absolutely certain that you are can recover your data.

I see that clear and deterministic procedure of online backup as I imagined
earlier becomes fuzzy and blurred :) This is obviously not suited even
for my notebook.

>
> Best Regards, Simon Riggs
>
>
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    Regards,        Oleg
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Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
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