[PERFORM] two disks - best way to use them?

[Rick Schumeyer]

I installed another drive in my linux pc in an attempt to improve performance on a large COPY to a table with a geometry index.   Based on previous discussion, it seems there are three things competing for the hard drive:   1)       the input data file 2)       the pg table 3)       the WAL   What is the best way to distribute these among two drives?  From Tom’s comments I would think that the pg table and the WAL should be separate.  Does it matter where the input data is?