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Re: Block-level CRC checks

From: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
To: "Brian Hurt" <bhurt(at)janestcapital(dot)com>
Cc: "Aidan Van Dyk" <aidan(at)highrise(dot)ca>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, pgsql(at)mohawksoft(dot)com, "Hannu Krosing" <hannu(at)2ndquadrant(dot)com>, Decibel! <decibel(at)decibel(dot)org>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>, "Pg Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Block-level CRC checks
Date: 2008-10-02 13:12:16
Message-ID: (view raw or whole thread)
Lists: pgsql-hackers
On Thu, Oct 2, 2008 at 9:07 AM, Brian Hurt <bhurt(at)janestcapital(dot)com> wrote:
> I have a stupid question wrt hint bits and CRC checksums- it seems to me
> that it should be possible, if you change the hint bits, to be able to very
> easily calculate what the change in the CRC checksum should be.

Doesn't the problem still remain?  The problem being that the buffer
can be changed as it's written, yes?

Jonah H. Harris, Senior DBA

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