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<TITLE>semantic question re: groups</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hello Newslist,</FONT>
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<P><FONT SIZE=2 FACE="Arial">I have a master process that gathers replies from all of its slave processes, then on the basis of the replies it needs to do a collective</FONT></P>
<P><FONT SIZE=2 FACE="Arial">operation on a sub-set of the slave processes. What's the cleanest way to do this?</FONT>
<BR><FONT SIZE=2 FACE="Arial">I can create a group on the master process and then a communicator from the group, but the slave processes cannot create the same communicator</FONT></P>
<P><FONT SIZE=2 FACE="Arial">without the duplicate global information that the master process holds. Each slave process only knows whether it is going to participate in the collective operation but it doesn't know anything about the other processes participating except the master process.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">I could do this of course with point-to-point operations, but it seems there should be a neater way. Any suggestions? </FONT>
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<P><FONT SIZE=2 FACE="Arial">David Minor</FONT>
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