On Mon, Dec 19, 2011 at 8:18 PM, Heikki Linnakangas <heikki.linnakan...@enterprisedb.com> wrote:
> Double-writes would be a useful option also to reduce the size of WAL that > needs to be shipped in replication. > > Or you could just use a filesystem that does CRCs... Double writes would reduce the size of WAL and we discussed many times we want that. Using a filesystem that does CRCs is basically saying "let the filesystem cope". If that is an option, why not just turn full page writes off and let the filesystem cope? Do we really need double writes or even checksums in Postgres? What use case are we covering that isn't covered by using the right filesystem for the job? Or is that the problem? Are we implementing a feature we needed 5 years ago but don't need now? Yes, other databases have some of these features, but do we need them? Do we still need them now? Tell me we really need some or all of this and I will do my best to make it happen. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers