Ok, so let's try asking the question in another way.
Which is the difference between having more than one tape into a file
and having one tape per file?
I mean, we are peaking runs belonging to different tapes and merge those
runs.
Moreover, why space is reduced taking in account that we can free the
read tuples, when both using one tape per file or more tapes per file?
Il 18/06/2010 21:16, Robert Haas ha scritto:
> I think that the comment is saying that it *would* take 2x or 4x the
> input space IF we created a separate file for each input. So instead
> we don't.
>
>