Re: Multiple clusters with same tablespace location

From: Melvin Davidson <melvin6925(at)gmail(dot)com>
To: Nate Dudenhoeffer <ndudenhoeffer(at)gmail(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Multiple clusters with same tablespace location
Date: 2016-07-20 15:34:46
Message-ID: CANu8FiyGM8COT0H4k_xCRE73rnLH1-ZJLbkdQUHM5aSFGGy0bQ@mail.gmail.com
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On Wed, Jul 20, 2016 at 10:59 AM, Nate Dudenhoeffer <ndudenhoeffer(at)gmail(dot)com
> wrote:

> What happens if I have two postgresql clusters running on the same server
> each with a tablespace pointing at the same location?
>
> I have a production server, where I intend to move some tables to a second
> tablespace. I have a development/qa server which has multiple clusters
> running, each with a restore from the production server.
>
> Thanks in advance,
> Nate
>

Pointing multiple clusters to the same tablespace is a very bad idea. You
run the risk of overwriting a file with the same name from a different
cluster.
Think of Ghostbusters ->"Don't cross the streams"!.
There is no reason why you cannot have separate directories for each
cluster/tablespace, so why ask for trouble?

--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.

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