Re: indexes separate from data

----- Original Message -----
From: "Judy Jecelin"

>
> Hi,
>
> A relatively novice user of PostgreSQL but not
> of other databases... I'm trying to understand the
> use of initlocation....I understand having separate
> data storage areas (perhaps for each database
> in your postmaster), but is there some way to have
> a separate location for indexes? How would this
> be designated through PostgreSQL?
>

since every index is stored as separate file, you should identify the files
corresponding to the indexes and move them to the proper device (while the
database is shut down) then create symlinks in the database directory
pointing to the moved files

to identify the names of the OS files corresponding to indexes connect to
the DB and execute
something like:

select relname, relfilenode
from pg_class
where relkind = 'i';

make sure u're moving the files from the proper database directory (execute
"select datname, oid from pg_database" to see the OS directory name
corresponding to each database)

tablespaces are in the TODO list, so one day the whole process should be
easier

hth,

Marin

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