| From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Hannu Krosing <hannu(at)krosing(dot)net>, Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, Stephen Denne <Stephen(dot)Denne(at)datamail(dot)co(dot)nz>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Core team statement on replication in PostgreSQL |
| Date: | 2008-06-04 16:16:40 |
| Message-ID: | 1212596200.4148.123.camel@ebony.site |
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| Lists: | pgsql-advocacy pgsql-hackers |
On Wed, 2008-06-04 at 11:37 -0400, Tom Lane wrote:
> This thread is getting out of hand, actually.
Agreed. We should start new threads for specific things. Please.
> However, since by definition pg_control doesn't change in a minor
> upgrade, there isn't any easy way to enforce a rule like "slaves must be
> same or newer minor version as the master". I'm not sure that we
> actually *want* to enforce such a rule, though.
Definitely don't want to prevent minor version mismatches. We want to be
able to upgrade a standby, have it catch up with the master then
switchover to the new version. Otherwise we'd have to take whole
replicated system down to do minor upgrades/backouts. Ugh!
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Training, Services and Support
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