On 17.12.2011 23:33, David Fetter wrote:
What:Please find attached a patch for 9.2-to-be which implements page checksums. It changes the page format, so it's an initdb-forcing change. How: In order to ensure that the checksum actually matches the hint bits, this makes a copy of the page, calculates the checksum, then sends the checksum and copy to the kernel, which handles sending it the rest of the way to persistent storage. ... If this introduces new failure modes, please detail, and preferably demonstrate, just what those new modes are.
Hint bits, torn pages -> failed CRC. See earlier discussion: http://archives.postgresql.org/pgsql-hackers/2009-11/msg01975.php -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
