@@ -89,7 +89,7 @@ In this example, we allocate 4 nodes, 16 cores, selecting only the nodes with In
### Placement by IB Switch
Groups of computational nodes are connected to chassis integrated Infiniband switches. These switches form the leaf switch layer of the [Infiniband network](../network/) fat tree topology. Nodes sharing the leaf switch can communicate most efficiently. Sharing the same switch prevents hops in the network and provides for unbiased, most efficient network communication.
Groups of computational nodes are connected to chassis integrated Infiniband switches. These switches form the leaf switch layer of the [Infiniband network](network/) fat tree topology. Nodes sharing the leaf switch can communicate most efficiently. Sharing the same switch prevents hops in the network and provides for unbiased, most efficient network communication.
Nodes sharing the same switch may be selected via the PBS resource attribute ibswitch. Values of this attribute are iswXX, where XX is the switch number. The node-switch mapping can be seen at [Hardware Overview](../hardware-overview/) section.
