From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Greg Stark <gsstark(at)mit(dot)edu>, Aidan Van Dyk <aidan(at)highrise(dot)ca>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Block-level CRC checks |
Date: | 2009-12-01 21:23:09 |
Message-ID: | 200912012123.nB1LN9n07210@momjian.us |
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Lists: | pgsql-hackers |
Andrew Dunstan wrote:
>
>
> Tom Lane wrote:
> > Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> >
> >> OK, fair enough. My implication that only page formats were at issue
> >> was off-base. My underlying point was that I think we have to be
> >> prepared to write code that can understand old binary formats (on the
> >> tuple, page, or relation level) if we want this to work and work
> >> reliably. I believe that there has been much resistance to that idea.
> >>
> >
> > We keep looking for cheaper alternatives. There may not be any...
> >
> >
> >
>
> Yeah. I think we might need to bite the bullet on that and start
> thinking more about different strategies for handling page versioning to
> satisfy various needs. I've been convinced for a while that some sort of
> versioning scheme is inevitable, but I do understand the reluctance.
I always felt our final solution would be a combination of pg_migrator
for system catalog changes and page format conversion for page changes.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
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