Charm++ parallel programming system

[Filippo Gioachin <gioachin AT uiuc.edu>]

Dear Daniel,

You can certainly exploit the speed of parallel file systems. While in Charm++ there is no direct support for parallel I/O, each processor can perform I/O operations, therefore spreading the reading or writing operations over multiple streams. You can for example use a chare group (or nodegroup) to open exactly one connection per processor. You will have to compute yourself what each object is reading in or writing out.

Regards,

Filippo

On Fri, Aug 6, 2010 at 04:54, Daniel Langr <langrd AT fel.cvut.cz> wrote:

What are the possibilities of using parallel I/O in Charm++ program? Can I exploit parallel file systems? Can I use pHDF5 format or MPI-IO routines? I have only find checkpointing abilities of Charm++ in manual, but no mention of general parallel I/O capabilities, such as reading input data (e.g. large sparse matrices) and writing output results.

Regards,
Daniel


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Filippo Gioachin
PhD Candidate
Department of Computer Science
University of Illinois at Urbana-Champaign
Ph: +1-217-333-4764