Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I’m studying about the new Process Manager that came automatically with MPICH2, but until now I can’t figure out what’s is big advance of this implementation, someone have knows a good tutorial or have some experience with?
The argonne wiki is a kind of too simple: http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager
From the point of view of where I work, the biggest single advance is scalability of process launching. Launching 8000+ task jobs with the previous process launchers in MPICH2-based MPI implementations was unusably slow and would frequently fail due to timeouts or other network problems, which all but ruled out MPICH2-based MPIs for our largest jobs. But Hydra has a good hierarchical launch model which can also take advantage of your resource manager.
The topology-aware allocation strategies are good, too, but compared to the difference between jobs startup failing (or taking hours) and jobs succeeding, it’s a second-order effect.