Re: 16-bit page checksums for 9.2

Simon Riggs <simon@2ndquadrant.com>

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From: Simon Riggs <simon@2ndQuadrant.com>

To: Kevin Grittner <Kevin.Grittner@wicourts.gov>

Cc: stark@mit.edu, aidan@highrise.ca, pgsql-hackers@postgresql.org, Andres Freund <andres@anarazel.de>

Date: 2011-12-28T02:54:02Z

Lists: pgsql-hackers

Attachments

checksum16.v2.patch (text/x-patch) patch v2

On Sun, Dec 25, 2011 at 1:01 PM, Kevin Grittner
<Kevin.Grittner@wicourts.gov> wrote:

> This chicken-and-egg
> problem requires the checksum to be implemented first.

v2 of checksum patch, using a conditional copy if checksumming is
enabled, so locking is removed.

Thanks to Andres for thwacking me with the cluestick, though I have
used a simple copy rather than a copy & calc.

Tested using make installcheck with parameter on/off, then restart and
vacuumdb to validate all pages.

Reviews, objections, user interface tweaks all welcome.

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services