Re: Postgres storage migration

On Fri, Dec 8, 2023 at 4:44 AM Rajesh Kumar <rajeshkumar(dot)dba09(at)gmail(dot)com>
wrote:

> Hi
>
> We are using openshift environment and postgres version 15.2. We want to
> change storage from ceph to local storage. So, Storage team made default
> storage as local. Now, I created a new cluster with same postgres version
> and I am planning to take backup from old cluster to new cluster. Size is
> 100gb. Ram 24gb, cpu 2.
>
> My question is, is there a combination of pg_dump and pg_restore that
> takes less time to complete the task?
>
> Last time it took more than 8hours. We were taking schema only dump using
> dumpall . Then data only backup using pg_dump in directory format.
>

8 hours is really slow for just 100GB of database. What exact command are
you using?

Paul Smith is right, though: Just shut down the instance, copy the files,
and start up the instance with new "-D" location.
(Will need to edit postgresql.conf if it defines file locations.)