mpiexec -n 2 ./h5ff_client_M6.2_demo -a -v >& outputA
grep M6.2 outputA > demooutputA
sed s/^.*M6/M6/ < demooutputA > demooutputA1
mv demooutputA1 demooutputA
grep r0: demooutputA > rank0outputA
grep r1: demooutputA > rank1outputA