Hi,<br><br>I would like to use a single send for sending strided data as 
described <br>below.<br><br>double dataArray[100];<br>for (i=0; i&lt;100; 
i+=10)<br>&nbsp;&nbsp;&nbsp; send dataArray[2+i], dataArray[4+i];<br><br>There will be numerous 
occurances of this send throughout the entire <br>program. As recommended, I 
should use derived datatype (vector/struct) <br>rather than pack/unpack into a 
contiguous memory. Which derived datatype <br>would give the best 
performance?<br><br>I&#39;ve tried searching at LAM/MPI website <br><a href="http://www.lam-mpi.org/using/support/">http://www.lam-mpi.org/using/support/</a> 
but it always gives this message<br><br>&quot;Sorry, you didn&#39;t specify any search 
criteria, so no search was 
performed.&quot;<br><br>Thanks.<br><br>Regards,<br>Daniel.<br>