MPI newbie

MPI newbie: What is “operating system bypass”?

The term “operating system bypass” (or “OS bypass”) is typically tossed around in MPI and HPC conversations; it’s generally something that is considered a “must have” in order to get good performance with many MPI applications. But what is it?  And if it’s good for performance, why don’t all applications use OS bypass?

Networks for MPI

It seems like we’ve gotten a rash of “how do I setup my new cluster for MPI?” questions on the Open MPI mailing list recently. I take this as a Very Good Thing, actually — it means more and more people are tinkering with and discovering the power of parallel computing, HPC, and MPI.

MPI newbie: Building MPI applications

In a previous post, I gave some (very) general requirements for how to setup / install an MPI installation. This is post #2 in the series: now that you’ve got a shiny new computational cluster, and you’ve got one or more MPI implementations installed, I’ll talk about how to build, compile, and link applications that […]

MPI newbie: Requirements and installation of an MPI

I often get questions from those who are just starting with MPI; they want to know common things such as: How to install / setup an MPI implementation How to compile their MPI applications How to run their MPI applications How to learn more about MPI This will be the first blog entry of several […]