vchoi_fork

[svn-r4024] Purpose:
    Multiple-group testing
Description:
    Added multiple groups under root group and multiple subgroups of
    certain levels.  Also writes several datasets in each group in
    parallel.
Solution:
Platforms tested:
    MPICH(IRIX 6.5, IRIX64 6.5(64), IRIX64 6.5(N32), Linux, SunOS 5.6)
    and SGI MPI(IRIX64 6.5).