On Tue, 30 Mar 2010, Gus Correa wrote:
> Salve Ricardo Reis!
> Como vai a Radio Zero?
:) busy, busy, busy. we are preparing to celebrate Yuri's Night, April the
> Doesn't this serialize the I/O operation across the processors,
> whereas MPI_Gather followed by rank_0 I/O may perhaps move
> the data faster to rank_0, and eventually to disk
> (particularly when the number of processes is large)?
oh, yes. I remember now why I thought of this. If the problem is large
enough you will run out of memory in the master machine (for me MPI-IO is
the way to go unless you're tied up with NFS). Off course one could always
send it by chunks, let the master write, then send other chunk...
PhD candidate @ Lasef
Computational Fluid Dynamics, High Performance Computing, Turbulence
Cultural Instigator @ Rádio Zero
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