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Re: [HACKERS] WAL replay logic (was Re: Mount options for

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Curt Sampson <cjs(at)cynic(dot)net>
Cc: Kevin Brown <kevin(at)sysexperts(dot)com>,pgsql-performance(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] WAL replay logic (was Re: Mount options for
Date: 2003-02-18 05:15:43
Message-ID: 200302180515.h1I5Fhc18116@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-performance
Added to TODO:

	* Allow WAL information to recover corrupted pg_controldata

---------------------------------------------------------------------------

Curt Sampson wrote:
> On Fri, 14 Feb 2003, Bruce Momjian wrote:
> 
> > Is there a TODO here, like "Allow recovery from corrupt pg_control via
> > WAL"?
> 
> Isn't that already in section 12.2.1 of the documentation?
> 
>      Using pg_control to get the checkpoint position speeds up the
>      recovery process, but to handle possible corruption of pg_control,
>      we should actually implement the reading of existing log segments
>      in reverse order -- newest to oldest -- in order to find the last
>      checkpoint. This has not been implemented, yet.
> 
> cjs
> -- 
> Curt Sampson  <cjs(at)cynic(dot)net>   +81 90 7737 2974   http://www.netbsd.org
>     Don't you know, in this new Dark Age, we're all light.  --XTC
> 
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-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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