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Re: Enabling Checksums

Ants Aasma <ants@cybertec.at>

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From: Ants Aasma <ants@cybertec.at>
To: Craig Ringer <craig@2ndquadrant.com>
Cc: Jeff Davis <pgsql@j-davis.com>, Greg Smith <greg@2ndquadrant.com>, Heikki Linnakangas <hlinnakangas@vmware.com>, Simon Riggs <simon@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2013-03-23T12:42:59Z
Lists: pgsql-hackers 
On Sat, Mar 23, 2013 at 5:14 AM, Craig Ringer <craig@2ndquadrant.com> wrote:
> Making zero a "not checksummed" magic value would significantly detract
> from the utility of checksums IMO.

FWIW using 65521 modulus to compress larger checksums into 16 bits
will leave 14 non-zero values unused.

Regards,
Ants Aasma
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