On Thu, Jan 22, 2015 at 06:04:24PM -0600, Jim Nasby wrote: > On 1/22/15 5:43 PM, Bruce Momjian wrote: > >This brings up the other problem that the mod times of the files > >are likely to be different between master and slave --- should I > >recommend to only use rsync --checksum? > > I don't think so. AIUI if the timestamps are different the very next > thing it does is run the checksum (which is expensive). So --checksum > is just going to hurt.
Oh, OK, good. > >I am going to now conclude that rsync is never going to work for > >this, unless we have pg_upgrade preserve relfilenodes as well. > >However, I am not even sure that is possible due to conflicts with > >system table relfilenodes created in the new cluster. > > We've previously talked about required steps before an upgrade; > perhaps we need a way to force an OID/relfilenode change on the old > server prior to upgrade. Actually, the idea I had forgotten is that we are not rsyncing between old and new clusters here, but between two servers who are both new after running pg_upgrade. Their relfilenodes match their oid, and the oids match, so we should be fine. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
