Re: Point in Time Recovery - Mailing list pgsql-hackers

From Mark Kirkwood
Subject Re: Point in Time Recovery
Date
Msg-id 410AEA25.1060702@coretech.co.nz
Whole thread Raw
In response to Re: Point in Time Recovery  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Ok - that is a much better way of doing it!

regards

Mark

Tom Lane wrote:

>"Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at> writes:
>  
>
>>If you use a readable file you will also need a feature for restore
>>(or a tool) to create an appropriate pg_control file, or are you
>>intending to still require that pg_control be the first file backed
>>up.
>>    
>>
>
>No, the entire point of this exercise is to get rid of that assumption.
>You do need *a* copy of pg_control, but the only reason you'd need to
>back it up first rather than later is so that its checkpoint pointer
>points to the last checkpoint before the dump starts.  Which is the
>information we want to put in the archive-label file insted.
>
>If a copy of pg_control were sufficient then I'd be all for using it as
>the archive-label file, but it's *not* sufficient because you also need
>the ending WAL offset.  So we need a different file layout in any case,
>and we may as well take some pity on the poor DBA and make the file
>easily human-readable.
>
>            regards, tom lane
>
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