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<p class="MsoNormal">I have implemented PETSc for my unstructured FVM problem by
external package Sundials, I want to move to a parallel version. I just read
the example <a href="http://www.mcs.anl.gov/petsc/petsc-2/snapshots/petsc-current/src/dm/ao/examples/tutorials/ex2.c.html">http://www.mcs.anl.gov/petsc/petsc-2/snapshots/petsc-current/src/dm/ao/examples/tutorials/ex2.c.html</a></p>
<p class="MsoNormal">I want know if my understanding is right:</p>
<p class="MsoNormal">DA is only for structured grid;</p>
<p class="MsoNormal">There is not too much difference between <a href="http://www.mcs.anl.gov/petsc/petsc-2/snapshots/petsc-current/src/ts/examples/tutorials/ex3.c.html">http://www.mcs.anl.gov/petsc/petsc-2/snapshots/petsc-current/src/ts/examples/tutorials/ex3.c.html</a>
and <a href="http://www.mcs.anl.gov/petsc/petsc-2/snapshots/petsc-current/src/ts/examples/tutorials/ex4.c.html">http://www.mcs.anl.gov/petsc/petsc-2/snapshots/petsc-current/src/ts/examples/tutorials/ex4.c.html</a>,
because DA can manage most parallel related staff.</p>
<p class="MsoNormal">At last is there any example I can learn to get a parallel
version of my problem.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks!</p>
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