Re: Running Postgres Daemons with same data files

Dear Sam,

Thank you for the quick response.

Can I you tell me why its not possible, it is possible with mysql then
why not with postgres. Actually I am working on High Avaibility
framework, and its our need, we can't make a separate database server. I
want to read/write and then close the file, very simple isn't? So how
can I achieve in postgres? Please help me.

regards
bhartendu

On Tue, 2003-12-09 at 17:13, Sam Barnett-Cormack wrote:
> Don't do that!!!! This absolutely cannot be done in any sane way.
>
> Instead, consider locating the database itself on one server, and then
> having multiple other servers running the client application.
>
> On Tue, 9 Dec 2003, Bhartendu Maheshwari wrote:
>
> > Dear All,
> >
> > I am working in Linux 8.0 and running postgresql 7.2. I am trying to
> > access same data files from the two postgres daemons. I mean there are
> > two PC's running with postgres and one NAS server where data files are
> > kept. To run postgres on the machines I first mount the NAS file system
> > and then run it like
> >
> > shell>postmaster -D $(PATH_TO_DATA_FILE)
> >
> > Daemons are running well but there is problems with synchronization of
> > the data files i.e when i insert some tuples in the tables its not
> > immediately writing then to file its kept in the cache only and when I
> > try to see from the other machine its displaying the old tuples.
> >
> > I want after every transaction or query the database update the data
> > files, how can I do this? And always read from the data files for select
> > operations. My main aim is no cache operation to use the postgres as
> > file system(for every operation file operations only), I know it will
> > degrade the database performance but its the requirement OR if there is
> > any other way by which I can achieve this, please tell me.
> >
> > regards
> > bhartendu
> >
> >
> >
> >
> >
> >
> >
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>
> --
>
> Sam Barnett-Cormack
> Software Developer | Student of Physics & Maths
> UK Mirror Service (http://www.mirror.ac.uk) | Lancaster University
>
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