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. 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. Regards, Damien -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general