itaps-parallel [Fwd: Re: Subcommittee for Parallel Interface Definition: Global IDs]

[Tim Tautges]

[Forwarding for archival]

-------- Original Message --------
Subject: Re: Subcommittee for Parallel Interface Definition: Global IDs
Date: Wed, 17 Oct 2007 11:11:11 -0600
From: Devine, Karen D. <kddevin at sandia.gov>
To: Carl Ollivier-Gooch <cfog at mech.ubc.ca>
CC: Onkar Sahni <osahni at scorec.rpi.edu>,   Mark Shephard 
<shephard at scorec.rpi.edu>,   Kenneth Jansen <kjansen at scorec.rpi.edu>, 
Tim Tautges <tautges at mcs.anl.gov>, Vitus Leung <vjleung at sandia.gov>, 
Lori A. Diachin <diachin2 at llnl.gov>,   Jason Kraftcheck 
<kraftche at cae.wisc.edu>,   Knupp, Patrick <pknupp at sandia.gov>



Carl:

Thank you for your thorough review of extensions needed to support parts
within the current interface.  To get the discussions going (and remind
people to review other's contributions), I'll offer the following
questions/comments.

First a general question:  Is determining whether a handle is an entity set
handle or a part handle left to the implementation?  Or do we need to
specify a convention?

> 1.  The use of the root set in the serial interface can be viewed as a
>     convention to allow us to query the whole database (in parallel, all
>     data in an instance) and an entity set using the same function.

Let me make sure I understand.  Do you mean that calling, say,
iMesh_getNumOfType with the root set returns the global (across all
processors) number of entities of a certain type?  If so, I'm OK with this
-- it fits with the definition of a root set -- but I wondered whether it
caused other people heartburn.  Lori, for example, said she used one root
set per processor that provided local-to-the-processor info.  Under this
suggestion, local-to-the-processor info would be provided by an iPart, not
the root set, right?

Thanks again.
Karen








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"You will keep in perfect peace him whose mind is
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             Tim Tautges            Argonne National Laboratory
         (tautges at mcs.anl.gov)      (telecommuting from UW-Madison)
         phone: (608) 263-8485      1500 Engineering Dr.
           fax: (608) 263-4499      Madison, WI 53706