Re: Shared data dir for multiple postgresql nodes

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/pg1 start

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.

Also, you should name the directories /postgres/data Postgres expects to be installed in a directory named "data".

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.