On Wed, Apr 17, 2013 at 01:59:12PM -0700, Jeff Davis wrote: > On Wed, 2013-04-17 at 12:42 -0400, Bruce Momjian wrote: > > > AFAIK, there's currently no per-page checksum flag. Still, being only > > > able to go from checksummed to not-checksummed probably is for all > > > practical purposes the same as not being able to pg_upgrade at all. > > > Otherwise, why would people have enabled checksums in the first place? > > > > Good point, but it is _an_ option, at least. > > > > I would like to know the answer of how an upgrade from checksum to > > no-checksum would behave so I can modify pg_upgrade to allow it. > > Why? 9.3 pg_upgrade certainly doesn't need it. When we get to 9.4, if > someone has checksums enabled and wants to disable it, why is pg_upgrade > the right time to do that? Wouldn't it make more sense to allow them to > do that at any time?
Well, right now, pg_upgrade is the only way you could potentially turn off checksums. You are right that we might eventually want a command, but my point is that we currently have a limitation in pg_upgrade that might not be necessary. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
