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--- cluster:91 [2010/12/16 16:05]
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+++ cluster:91 [2010/12/23 15:18]
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@@ Line 136: / Line 136: @@
 ===== Dell =====
+Since the cluster will be shut down December 28th we have an opportunity to run Linpack on the Dell cluster.
+  * N calculation: 36 nodes, 4/8/16 gb mix for a total of 320 gb which yields 40 gb double precision (8 byte) elements … 40 gb is 40*1024*1024*1024 = 42,949,672,960 … take the square root of that and round 207,243 … 80% of that is 167,800
+  * NB: start with 64, then 128, try 192 ...
+  * PxQ: perfect square of 17x17=289, close to the number of cores we have (288) but then swallowtail adds two.
+Since the cluster will be shut down December 28th we have an opportunity to run Linpack on the Dell cluster.
+  * N calculation: 36 nodes, 4/8/16 gb mix for a total of 320 gb which yields 40 gb double precision (8 byte) elements … 40 gb is 40*1024*1024*1024 = 42,949,672,960 … take the square root of that and round 207,243 … 80% of that is 167,800
+  * NB: start with 64, then 128, try 192 ...
+  * PxQ: perfect square of 17x17=289, close to the number of cores we have (288) but then swallowtail adds two.

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