Cedar: Difference between revisions

Cedar (view source)

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-Cedar's network topology is made up of "islands". Most islands contain 32 nodes: there are 18 islands with 32 Broadwell nodes, each with 32 cores (i.e., 1024 cores per island), 44 islands with 32 Skylake and Cascade Lake nodes, each with 48 cores (i.e., 1536 cores per island), 4 islands with 32 P100 GPU nodes and 6 islands with 32 V100 GPU nodes. There are also 2 islands with 24 large memory Broadwell nodes each. Nodes within an island are connected in a fully non-blocking topology (Omni-Path fabric). There is a 2:1 blocking factor between islands.
+Cedar's network topology is made up of "islands" with a 2:1 blocking factor between islands. Within an island the interconnect (Omni-Path fabric) is fully non-blocking.
+Most islands contain 32 nodes:
+* 18 islands with 32 Broadwell nodes, each with 32 cores, i.e., 1024 cores per island;
+* 44 islands with 32 Skylake and Cascade Lake nodes, each with 48 cores, i.e., 1536 cores per island;
+* 4 islands with 32 P100 GPU nodes;
+* 6 islands with 32 V100 GPU nodes;
+* 2 islands each with 24 large memory Broadwell nodes.
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