Song, > I know it is the way to set the capacity of each node, however, I want to > know, how can we make Torque manager that we will run more than 1 mapred > tasks on each machine. Because if we dont do this, torque will assign other > cores on this machine to other tasks, which may cause a competition for > cores. > > Do you know how to solve this? >
If I understand, what you want is that when a physical node is allocated via HOD by the Torque resource manager, you don't want that node to be shared by other jobs. Is that correct ? Looking on the web, I found that schedulers like Maui / Moab that are typically used with Torque allow for this. In particular, I thought this link: https://lists.sdsc.edu/pipermail/npaci-rocks-discussion/2009-May/039949.html may be particularly useful. It talks about a NODEACCESSPOLICY configuration in Maui that is described here: http://www.clusterresources.com/products/maui/docs/5.3nodeaccess.shtml. Setting this policy to SINGLEJOB seems to solve your problem. Can you check if this meets your requirement ?
