From: Bruce Momjian <bruce@momjian.us>
To: Markus Schiltknecht <markus@bluegap.ch>
Cc: PostgreSQL-documentation <pgsql-docs@postgresql.org>
Subject: Re: High Availability, Load Balancing, and Replication Feature Matrix
Date: Mon, 19 Nov 2007 16:21:10 -0500 (EST)
Message-ID: <200711192121.lAJLLAi07431@momjian.us> (raw)
In-Reply-To: <4741E93F.7090909@bluegap.ch>
Markus Schiltknecht wrote:
> Eh.. I think you misunderstood. The Sequoia people use RAIDb to mean
> Redundant Array of Inexpensive _Databases_. A possible setup might look
> like:
You are right. I didn't understand that. Interesting.
> > I am afraid we are stuck between clarity and understand-ability here. ;-)
>
> Agreed, but that's where I think the current chapter creates confusion
> by trying to separate into "statement based replication middleware" and
> "synchronous multi-master replication". Such a separation does not
> exist, instead every combination of single vs. multi-master and
> statement based vs tuple based is possible. Examples:
>
> single-master, tuple based: Slony-I, Mammoth Replicator
> multi-master, tuple based: Postgres-R, Slony-II, maybe Bucardo (?)
> single-master, statement based: maybe pgpool or skytools can do that (?)
> multi-master, statement based: Sequoia, PgCluster
Uh, to me the issue is something like pgpool and Sequoia, where the
_master_/replication is happening _outside_ the server, vs something
like Oracle RAC where it is happening inside the server.
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://postgres.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
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To: pgsql-docs@postgresql.org
Cc: bruce@momjian.us, markus@bluegap.ch
Subject: Re: High Availability, Load Balancing, and Replication Feature Matrix
In-Reply-To: <200711192121.lAJLLAi07431@momjian.us>
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