Re: warm standby replication safe failover
| От | Andrew Puschak |
|---|---|
| Тема | Re: warm standby replication safe failover |
| Дата | |
| Msg-id | CALFZoBt3couV46TZE9V7OtgnW3K9MBp8M7__7jaJxpK7bh0B=Q@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: warm standby replication safe failover (Andrew Puschak <apuschak@gmail.com>) |
| Список | pgsql-novice |
Hi again,
I setup PostgreSQL 9.2 to try replication and the 9.2 documentation answered my question whereas the 8.4 documentation is missing the section
25.2.2. Standby Server Operation http://www.postgresql.org/docs/9.2/static/warm-standby.html#STANDBY-SERVER-OPERATION It explains my assumption that if you copy over the last pg_xlog from the Primary, which I can do after safely shutting down postgres, recovery will first apply the WALs from the archive directory and then attempt to recover anything else in pg_xlog, but take priority over the WALs in the archive directory.As for upgrading to the newer release branch, I'm asking the CentOS community where/how the PostgresSQL version is determined in their repositories. It would be easier if I could continue to use the default Base and Update repositories from CentOS to update postgres, but I don't know when they plan to include 9.x versions.
Andrew
On Sat, Feb 2, 2013 at 12:45 PM, Andrew Puschak <apuschak@gmail.com> wrote:
Thanks Tom!The PostgreSQL 8.4 is coming from the default latest CentOS 6.3 updates repository which makes it an easy install and upgrade later (yum install postgresql-server). I'll try installing/upgrading my test setup using http://yum.postgresql.org repository. I'm also going to need to find out what migrating to a newer version will affect with the current production data.AndrewOn Sat, Feb 2, 2013 at 12:19 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:Andrew Puschak <apuschak@gmail.com> writes:It sounds like you're trying to keep them on 8.4. Why not move them to
> I'm new here and have a question. I'm working on a replacement PostgreSQL
> 8.4 setup for a small company. They now have a Primary postgres server and
> 2 secondaries which are replicated using Slony-I, however the consulting
> company that set it up is afraid to failover and keeping Slony running is
> taking lots of resources.
some newer release branch where you can make use of streaming
replication? Aside from the benefits of that, 8.4 will be out of
support next year, so setting up new servers with that release series
seems pretty short-sighted.
I realize that dealing with a version upgrade might not be their highest
priority right now, but they're going to have to deal with it before too
long, and doing so now would put them in position to have a far better
replication solution than what you're describing.
regards, tom lane
Andrew Puschak
(267) 614 - 2373
apuschak@gmail.com
http://andrewpuschak.com
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