Re: Mapping tables to disk drives

Richard Emberson wrote:
> Bruce Momjian wrote:
>
> > Richard Emberson wrote:
> > > Are there any guides, references, etc. for helping someone:
> > > 1) know how to map a particular table to a particular disk drive (is it
> > > just symbolic links) and
> >
> > Yep, just symlinks. We know we need a better method. Also, as the
> > table grows, extent files for >1gb will also need to be symlinked.
> >
> > > 2) for what type of queries and table layout combination would it make
> > > sense to do so?
> >
> > First, pg_xlog/ should be on a separate drive. Then you can think about
> > moving indexes and tables to separate drives.
>
> I looked around the .../data directory. How does one map from index and
> table names
> to file names?

/contrib/oid2name.

> Also, I assume that when a extent file for >1Gb is created (by the DB as it
> is running)
> one must stop the DB, move the file, make a symbolic link to the moved file,
> and then
> restart the DB.

Yes, yuck.

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026