Обсуждение: High availibility with PostgreSQL
I am trying to present a convincing argument for the powers that be to migrate from SQL Server 2000 / W2K Advanced Server at my work to PostgreSQL or another open source database that can run on Linux. I'm trying to find out what the current best solutions for failover are currently available for PostgreSQL on Linux. A commercial soultion would be OK with us. I've scoured google groups but only came up with the eserver stuff which seems to have not been updated since 2000. Is it feasible to replicate the data store of PostgreSQL? Is it possible to setup a log shipping like warm standby server soultion? Is there anyway to run PostgreSQL in a cluster? Thank you so much for your advice! Chris
try this page about load-balancing: http://dbbalancer.sourceforge.net/ didn't try it yet, but sounded interesting to me when I first came across it this morning. Mit freundlichem Gruß Henrik Steffen Geschäftsführer top concepts Internetmarketing GmbH Am Steinkamp 7 - D-21684 Stade - Germany -------------------------------------------------------- http://www.topconcepts.com Tel. +49 4141 991230 mail: steffen@topconcepts.com Fax. +49 4141 991233 -------------------------------------------------------- 24h-Support Hotline: +49 1908 34697 (EUR 1.86/Min,topc) -------------------------------------------------------- System-Partner gesucht: http://www.franchise.city-map.de -------------------------------------------------------- Handelsregister: AG Stade HRB 5811 - UstId: DE 213645563 -------------------------------------------------------- ----- Original Message ----- From: "IH8MSFT" <me@here.com> To: <pgsql-general@postgresql.org> Sent: Tuesday, July 23, 2002 8:29 AM Subject: [GENERAL] High availibility with PostgreSQL > I am trying to present a convincing argument for the powers that be to > migrate from SQL Server 2000 / W2K Advanced Server at my work to PostgreSQL > or another open source database that can run on Linux. > > I'm trying to find out what the current best solutions for failover are > currently available for PostgreSQL on Linux. A commercial soultion would > be OK with us. > > I've scoured google groups but only came up with the eserver stuff which > seems to have not been updated since 2000. > > Is it feasible to replicate the data store of PostgreSQL? Is it possible to > setup a log shipping like warm standby server soultion? Is there anyway to > run PostgreSQL in a cluster? > > Thank you so much for your advice! > > Chris > > ---------------------------(end of broadcast)--------------------------- > TIP 6: Have you searched our list archives? > > http://archives.postgresql.org
On Tue, Jul 23, 2002 at 06:29:14AM +0000, IH8MSFT wrote:
> I'm trying to find out what the current best solutions for failover are
> currently available for PostgreSQL on Linux. A commercial soultion would
> be OK with us.
>
> I've scoured google groups but only came up with the eserver stuff which
> seems to have not been updated since 2000.
We use it. It works. The commercial version from PostgreSQL, Inc.
is better than the code in contrib/ by a long shot.
It is _not_ a hot failover system, however, and I'm not even sure it
could be made so. It's a store-and-forward sort of replication
system. If the master database fails, you don't want one of the
slaves to take over automatically, because you'll have "stranded"
data -- stuff that made it in to your master before the failure, but
which did not get replicated.
If you are running high-quality servers, the chances of total failure
are not that big. What is more likely is a sort of "emergency
shutdown" case, where you have to sync to the slave and then cut over
to it while you fix the (now former) master. The rserv code will
allow you to do that, although it's a bit of a pain to resync the
systems.
I believe you can get more information from <pgsql@pgsql.com>. I am
not associated with PostgreSQL, Inc, by the way, except as a
customer.
A
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