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On Jan 1, 2014, at 1:50 PM, Pavan Balaji <[email protected]> wrote:
On Jan 1, 2014, at 1:25 PM, Jeff Hammond <[email protected]> wrote: Isn't the process manager infrastructure hetero-safe? At the very least, ssh-ing "uname -a" around the ring of procs can identify the problem on O(1) cost.
1. The process manager not heterogeneous-safe.
Is it possible to get the proc table sufficient for 3 though?
2. "uname -a" is not an accurate representation, since two different Linux distributions on the same architecture are not considered heterogeneous. The datatype representation has to be different.
Well query whatever you need to query then. MPICH could hash all the datatypes sizes during configuration and store that value somewhere useful.
3. Doing an extra ssh to all the nodes is expensive to do every time.
You just need a ring to verify homogeneity. Forming a ring is O(1) per node. Jeff
— Pavan
-- Pavan Balaji http://www.mcs.anl.gov/~balaji
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