On Fri, Mar 11, 2011 at 12:58, Damien Churchill <damoxc@xxxxxxxxx> wrote: > Hi there, > > I have done quite a bit of searching but have been unable to find any > way to do this. I am quite keen to use PostgreSQL 9.0's streaming > replication to create a master/slave write/read setup. However I am > unsure of an upgrade procedure whilst using streaming replication that > doesn't yield any downtime (including being able to write). From what > I have read the WAL won't be compatible between 9.0 and 9.1 so it > won't be possible to take the slave off-line and upgrade it, promote > it to master and then upgrade the old master. That's correct, you can'd do that. > So I was wondering if anyone knows of a method that allows you to do > this. Sorry if this is an often asked question and I just haven't been > able to find the answer. Using SR, the method will be to upgrade the master and then rebuild the slave off that one. You can upgrade with pg_upgrade, which will shorten your downtime, but there will be downtime. For a downtime-less upgrade, you will need to look at one of the "userspace replication solutions", like slony, bucardo, londiste etc. -- Magnus Hagander Me: http://www.hagander.net/ Work: http://www.redpill-linpro.com/ -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
