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Re: Block-level CRC checks

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
Cc: "Zdenek Kotala" <Zdenek(dot)Kotala(at)sun(dot)com>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>, "Pg Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Block-level CRC checks
Date: 2008-10-30 15:27:07
Message-ID: 15357.1225380427@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
"Jonah H. Harris" <jonah(dot)harris(at)gmail(dot)com> writes:
> On Thu, Oct 30, 2008 at 11:14 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Well, yeah, but it has to be able to tell which version it's dealing
>> with.  I quite agree with Zdenek that keeping the version indicator
>> in a fixed location is appropriate.

> Most of the other databases I've worked, which don't have different
> types of pages, put the page version as the first element of the page.
>  That would let us put the crc right after it.  Thoughts?

"Fixed location" does not mean "let's move it".

			regards, tom lane

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