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Re: Block-level CRC checks - Mailing list pgsql-hackers

From Jonah H. Harris
Subject Re: Block-level CRC checks
Date
Msg-id 36e682920810020730s577cdf8dpd52af8e1fcde5842@mail.gmail.com
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In response to Re: Block-level CRC checks  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
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On Thu, Oct 2, 2008 at 10:27 AM, Heikki Linnakangas
<heikki.linnakangas@enterprisedb.com> wrote:
>> Ideally, though we don't have any spare bits to play with in MAXALIGN=4.
>
> In the page header? There's plenty of free bits in pd_flags.

Ahh, didn't see that.  Good catch!

> But isn't it a bit dangerous to have a single flag on the page indicating
> whether the CRC is valid or not? Any corruption that flips that bit would
> make the CRC check to be skipped.

Agreed.

-- 
Jonah H. Harris, Senior DBA
myYearbook.com

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