From: | "Jehan-Guillaume (ioguix) de Rorthais" <ioguix(at)free(dot)fr> |
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To: | Ron <ronljohnsonjr(at)gmail(dot)com> |
Cc: | pgsql-admin(at)lists(dot)postgresql(dot)org |
Subject: | Re: Shared data dir for multiple postgresql nodes |
Date: | 2018-12-20 15:35:14 |
Message-ID: | 20181220163514.0f493bb8@firost |
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Thread: | |
Lists: | pgsql-admin |
On Thu, 20 Dec 2018 09:28:26 -0600
Ron <ronljohnsonjr(at)gmail(dot)com> wrote:
> On 12/20/18 2:41 AM, Prince Pathria wrote:
> > Hi,
> > I'm asking this out of curiosity, if I have 2 postgres nodes on same server,
> > 1. listening on port 5432
> > 2. listening on port 5433
> >
> > What issue's I might face if I do it like this? Assuming I'm doing this
> > for multimaster approach.
> >
> > |pg_ctl -D /data/postgres-o "-p 5432"-l /var/log/pg1start|
> > |
> > |pg_ctl -D /data/postgres-o "-p 5433"-l /var/log/pg2 start||
>
> I don't think Postgres will even let you install the second node in the same
> directory.
Well, with little insanity, you could. I already faced some corruptions
based on this recipe because of bad architectures. First easy situation to
imagine: shared rw storage with autofailover and no fencing.
Shake, wait and observe.
> Also, you should name the directories /postgres/data Postgres expects to be
> installed in a directory named "data".
PostgreSQL does not expect such thing...or maybe I don't understand what you
mean.
> In fact, if you install Postgres from postgresql.org packages, it'll install
> it in "X.Y/data", where X is the major version number, and Y is the minor
> version number.
This is mostly packager decision...and a good one in fact :)
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