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+and each Dell PowerEdge R420 node features:+
== Hardware Configuration ==
== Hardware Configuration ==
−A cluster of 32 AMD and 7 Intel computers has been assembled to facilitate parallel computation in the field of Statistics. Each computer "node", Dell PowerEdge SC1435, features:
+A cluster of 32 AMD and 15 Intel computers has been assembled to facilitate parallel computation in the field of Statistics.
+Each (32) Dell PowerEdge SC1435 node features:
*2 x 4-core AMD Opteron 2350 processors (2 GHz)
*2 x 4-core AMD Opteron 2350 processors (2 GHz)
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*250 GB hard drive (SATA, 7.2k RPM, 3 Gbps)<br>
*250 GB hard drive (SATA, 7.2k RPM, 3 Gbps)<br>
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−each (7) Dell PowerEdge R420 node features:
*2 x 6-core Intel Xeon E5-2430L processors (2 GHz)
*2 x 6-core Intel Xeon E5-2430L processors (2 GHz)
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*4 TB hard drive (SATA, 7.2k RPM, 3 Gbps)<br>
*4 TB hard drive (SATA, 7.2k RPM, 3 Gbps)<br>
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+each (8) Dell PowerEdge R430 node features:
+*2 x 8-core Intel Xeon E5-2650L processors (1.8 GHz)
+*64 GB of memory
+*4 TB hard drive<br>
+<br>
+
It is best to think of every core as a separate <b><i>virtual machine</i></b> or processing <b><i>slot</i></b> capable of running one process. The cores remain isolated because the computer cannot distribute a simple, stand-alone process between its cores without special instructions for doing so within the code itself. We will therefore refer interchangeably to cores, slots or virtual machines (of which there are 8 x 31 + 12 x 7) instead of computers or processors as independent computing units, each having about 1 GB of RAM at its disposal when all cores are uniformly loaded.<br>
It is best to think of every core as a separate <b><i>virtual machine</i></b> or processing <b><i>slot</i></b> capable of running one process. The cores remain isolated because the computer cannot distribute a simple, stand-alone process between its cores without special instructions for doing so within the code itself. We will therefore refer interchangeably to cores, slots or virtual machines (of which there are 8 x 31 + 12 x 7) instead of computers or processors as independent computing units, each having about 1 GB of RAM at its disposal when all cores are uniformly loaded.<br>
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