Re: [ADMIN] Question about multiple postmasters

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: djackson(at)cpsgroup(dot)com (Jackson, DeJuan)
Cc: djackson(at)cpsgroup(dot)com, pgsql-admin(at)postgreSQL(dot)org
Subject: Re: [ADMIN] Question about multiple postmasters
Date: 1998-10-02 02:15:11
Message-ID: 199810020215.WAA23234@candle.pha.pa.us
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> > > Has anyone tried running multiple postmasters w/ the same data
> > > directory.
> > > Any issues to watch out for? Problems with locking?
> > > All of the systems would be running on Red Hat 5.1 x86.
> >
> > Hard to imagine why you would want to do that. pg_log would be shared
> > by all backends, even if they connect to different databases, so this
> > is
> > very bad.
> Where is the pg_log located? The only thing they would share would be
> data directories. I plan on running each backing on different machines
> sharing a data directory. It's more for load distribution than anything
> else.

It will not work. pg_log is in the toplevel data directory, and some of
the stuff is stored in shared memory, which is not shared among
postmasters.

--
Bruce Momjian | http://www.op.net/~candle
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+ If your life is a hard drive, | 830 Blythe Avenue
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