Hello, I like to find out, if there is a real difference in openMPI performance (latency) when it runs under Redhat Linux with MRG kernel installed. Redhat claims that its MRG Grid Support for a wide variety of tasks, ranging from sub-second calculations to long-running, highly parallel (MPI) jobs. Does anyone has used OpenMPI in the linux MRG Grid environment. If you have, have you seen any differencec in OMPI performance. I do appreciate any comments. Thanks Nader Hotmail® has ever-growing storage! Don’t worry about storage limits. Check it out. _________________________________________________________________ Lauren found her dream laptop. Find the PC that’s right for you. http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290