Hi everyone, I did a simulation in an amazon cluster with 7.5 GB memory and 4 EC2 Compute Units (2 virtual cores with 2 EC2 Compute Units each) and it was done with 0.5ns/day. Now Im running a simulation in another amazon cluster of 7 GB of memory and 20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each), but still the speed is same even if i use "mpirun -np 8" with the mdrun, and finally its taking the same time as 2core system, i.e. 0.5ns/day. I would like to know whether I should make any changes during compilation? I had enabled mpirun while compiling GROMACS. Do I need to make any changes, so that it will consider all the 8 processors?
Thank you very much. Sumanth -- ** *Sumanth Kumar.M * On-the-Job Trainee Plant Molecular Biology Lab. Plant Breeding, Genetics and Biotechnology International Rice Research Institute DAPO-7777, Metro Manila Philippines Tel : +63- 9163129718 email : s.ku...@irri.org sumanthkuma...@gmail.com
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