Re: data files management (tablespaces)

On Sun, 18 May 2003, Victor Yegorov wrote:

> Hello.
>
> I wonder, is it possible in PostgreSQL to manage data files, stored on
> disks? I mean, I'd like to tell DB where store this or that object.
>
> Now I have a server running a DB and a small application that uses
> it. At the time, when project started, there were enough space on HD
> (4Gb). Now it seems, that soon I'm going to have problems.
>
> At now, I'm daily backuping and then deleting all "expired" records. But
> that is not the solution I want.
>
> Is it possible to add one (or more) disks and tell Postgres to store, say,
> indicies or big tables on them? Such things in ORACLE are called
> tablespaces.
>
> I've searched the docs, but found nothing apropriate, may be I've missed the
> point.
>
> I know, I can just upgrade hardware and move my stuff to the new server. But
> still - is it possible to manage objects?

Generally not live, and not easily. :(  Right now about the best you can
do is move files around while the system is down and use symlinks.  This
doesn't really help on really big tables since the new extents (after each
gig iirc) will get created in the default place and you'd need to down the
server in order to move it safely I think.