On 11/12/12 4:44 AM, Craig Ringer wrote:
Is it absurd to suggest using another bitmap, like the FSM or visibility map, to store information on page checksumming while checksumming is enabled but incomplete?
I spent some time thinking about that last week. One problem with it is that the bitmap structure itself has the same issues as every other write here--how do we know it's going to disk accurately? The "put 'checksum on' bits on the page" idea and "put checksum on bits in a map" have the same fundamental issue. Things might get out of sync in the same way, you've just moved the potentially suspicious write to a new place.
-- Greg Smith 2ndQuadrant US g...@2ndquadrant.com Baltimore, MD PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
