Alvaro Herrera <alvhe...@commandprompt.com> writes: > Excerpts from Robert Haas's message of jue mar 01 21:23:06 -0300 2012: >> and that, further, you were arguing that we should not support >> multiple page versions.
> I don't think we need to support multiple page versions, if multiple > means > 2. That's exactly the point here. We clearly cannot support on-line upgrade unless, somewhere along the line, we are willing to cope with two page formats more or less concurrently. What I don't want is for that requirement to balloon to supporting N formats forever. If we do not have a mechanism that allows certifying that you have no remaining pages of format N-1 before you upgrade to a server that supports (only) versions N and N+1, then we're going to be in the business of indefinite backwards compatibility instead. I'm not entirely sure, but I think we may all be in violent agreement about where this needs to end up. regards, tom lane -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers