[Beowulf] K computer powered by Open MPI

[Rayson Ho]

>From the presentation, "Programming on the K computer", P. 11:
http://www.fujitsu.com/downloads/TC/sc10/programming-on-k-computer.pdf

Open MPI based:
* Open Standard, Open Source, Multi-Platform including PC Cluster.
* Adding extension to Open MPI for "Tofu" interconnect

And it was confirmed that Open MPI (actually, Open MPI + Fujitsu's
code for Tofu) was used in LINPACK to achieve 8 PFLOPS and get the #1
in TOP500:

http://blogs.cisco.com/performance/open-mpi-powers-8-petaflops/


Other opensource stuff used by K:

* Lustre - see the presentation, "An Overview of Fujitsu's Lustre
Based File System":
http://www.olcf.ornl.gov/wp-content/events/lug2011/4-12-2011/230-300_Shinji_Sumimoto_LUG2011-FJ-20110407-pub.pdf

* Linux on SPARC - should make Ellison happy as he needs to ship SPARC
T4 with Oracle Linux:
http://www.pcworld.com/article/212564/ellison_oracle_enterprise_linux_coming_to_sparc.html

Rayson