Pre-allocate space in advance

I apologize for the wrong subject in a previous post. Here it is again:


My understanding that the current release of Postgres does not allow
the DBA to pre-allocated space for the data files or tablespace in
advance (as Oracle or SQL Server does). Am I correct on that ? If that's
still the case, is this item on the TODO list or the white board?
Pre-allocating space will prevent extending the datafile during loading
massive data (batch processing) and would improve the overall batch
write performance.

Thanks in advance.

--
Husam

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TIP 2: Don't 'kill -9' the postmaster

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