Re: moving tables

On 6/20/12 3:27 PM, Midge Brown wrote:
> I need to move a postgres 9.0 database -- with tables, indexes, and wals associated with 16 tablespaces on 12 logical drives -- to an existing raid 10 drive in another volume on the same server. Once I get the data off the initial 12 drives they will be reconfigured, at which point I'll need to move everything from the 2nd volume to the aforementioned 12 logical drives on the first volume. This is being done both to free up the 2nd volume and to better utilize raid 10.
>
> I checked around and found a way to create sql statements to alter the public tablespaces and indexes, but I haven't found anything that provides information about moving the numerous associated config files, log files, etc.
>
> ANY comments, suggestions, or direction to existing documentation would be greatly appreciated.

1. back everything up.

2. create a bunch of directories on the RAID10 to match the existing
tablespaces (they won't be mounts, but Postgres doesn't care about that).

3. shut down postgres

4. copy all your files to the new directories

5. change your mount points which were in use by the old tablespaces to
symlinks which point at the new diretories

6. start postgres back up from the new location

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com