Re: how to create multiple databases running in different dirs - Mailing list pgsql-general

From Rémi Cura
Subject Re: how to create multiple databases running in different dirs
Date
Msg-id CAJvUf_uhsiHU8fBsyx4yukyWXDAAsyCm7UFe9kKA540FY1q2kQ@mail.gmail.com
Whole thread Raw
In response to Re: how to create multiple databases running in different dirs  (John R Pierce <pierce@hogranch.com>)
Responses Re: how to create multiple databases running in different dirs  (John R Pierce <pierce@hogranch.com>)
List pgsql-general
Hey,
postgres already takes care of multiple client writting/reading,
so you don't really need to be afraid of concurrency (for most of the stuff)

If it is so your desire, you could also have multiple server on the same machine (althought on different port).
This way each server would have its own repository.

Cheers,
Rémi-C


2014-07-01 4:59 GMT+02:00 John R Pierce <pierce@hogranch.com>:
On 6/30/2014 4:58 PM, frank ernest wrote:
Hi, I'm new to postgresql and sql in general. I desired to write a program in C that used an sql data base for IPC and because multiple copies of my program might run on the same machine I wanted a way to ensure that only one copy of each multithreaded program got one database but I'm uncertain how to go about this. As the program might be run several different times and each time it should only get the data base from it's predisesor I can't use the pid as a unique data base name. I thought that I might start multiple pgsql instances but somehow that seems wrong. Any ideas?

how would an instance of your program know what to connect to, or which previous instance its 'predecessor' was ?

normally, you have ONE database for a given set of applications, and all the applications share the same database tables and such.


--
john r pierce                                      37N 122W
somewhere on the middle of the left coast



--
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general

pgsql-general by date:

Previous
From: hubert depesz lubaczewski
Date:
Subject: Re: Validating User Login Within Postgres
Next
From: Rich Shepard
Date:
Subject: Re: Validating User Login Within Postgres