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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: 36e682920810020612m402bcb38x98808dc90b623f3a@mail.gmail.com (view raw or flat)
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
myYearbook.com

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