Re: "hot standby" system

From: Hannu Krosing <hannu(at)skype(dot)net>
To: Chris Campbell <chris(at)bignerdranch(dot)com>, Marko Kreen <markokr(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: "hot standby" system
Date: 2006-07-22 07:49:29
Message-ID: 1153554569.2822.8.camel@localhost.localdomain
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Ühel kenal päeval, R, 2006-07-21 kell 20:00, kirjutas Chris Campbell:
> The documentation [1] says this about On-line backup and point-in-
> time recovery:
>
> > If we continuously feed the series of WAL files to another machine
> > that has been loaded with the same base backup file, we have a "hot
> > standby" system: at any point we can bring up the second machine
> > and it will have a nearly-current copy of the database.
>
> Is this possible today in a stable and robust way? If so, can we
> document the procedure? If not, should we alter the documentation so
> it's not misleading? I've had several people ask me where to enable
> the "hot standby" feature, not realizing that PostgreSQL only has
> some of the raw materials that could be used to architect such a thing.

We have written a management script that manages the setup und failover
procedures. It is a part of the SkyTools package we announced at the
postgresql conference in Toronto.

We failed to put it up on PgFoundry during the code sprint (it took a
whole day to enable the project there :( ) and have not had enough time
to do it after coming back. But it will be on PgFoundry eventually.

Marko has the details if you need it faster

--
----------------
Hannu Krosing
Database Architect
Skype Technologies OÜ
Akadeemia tee 21 F, Tallinn, 12618, Estonia

Skype me: callto:hkrosing
Get Skype for free: http://www.skype.com

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