Re: WAL & RC1 status

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От Bruce Momjian
Тема Re: WAL & RC1 status
Дата
Msg-id 200103021554.KAA23086@candle.pha.pa.us
обсуждение исходный текст
Ответ на WAL & RC1 status  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: WAL & RC1 status  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: WAL & RC1 status  (ncm@zembu.com (Nathan Myers))
Список pgsql-hackers
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Is there a version number in the WAL file?
> 
> catversion.h will do fine, no?
> 
> > Can we put conditional code in there to create
> > new log file records with an updated format?
> 
> The WAL stuff is *far* too complex already.  I've spent a week studying
> it and I only partially understand it.  I will not consent to trying to
> support multiple log file formats concurrently.

Well, I was thinking a few things.  Right now, if we update the
catversion.h, we will require a dump/reload.  If we can update just the
WAL version stamp, that will allow us to fix WAL format problems without
requiring people to dump/reload.  I can imagine this would be valuable
if we find we need to make changes in 7.1.1, where we can not require
dump/reload.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


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