add example of a fat tree cluster platform file

diff --git a/examples/platforms/fat_tree_cluster.xml b/examples/platforms/fat_tree_cluster.xml
new file mode 100644 (file)
index 0000000..d20e7fb
--- /dev/null
+++ b/examples/platforms/fat_tree_cluster.xml
@@ -0,0 +1,18 @@
+<?xml version='1.0'?>
+<!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid.dtd">
+
+<!-- This is an example for a fat tree cluster. 
+This is taken from figure 1/ b/ of the paper "D-Mod-K Routing Providing 
+Non-Blocking Traffic for Shift Permutations on Real Life Fat Trees"  
+available at webee.technion.ac.il/publication-link/index/id/574
+This defines a two levels fat-tree, with 4 leaf switches connected to 4 nodes each
+and 2 core switches connected to each leaf switch by two cables
+-->
+
+<platform version="3">
+<AS id="AS0" routing="Full">
+<cluster id="bob_cluster" prefix="bob" suffix=".hamburger.edu"
+  radical="0-15" power="1Gf" bw="125MBps" lat="50us" topology="FAT_TREE" topo_parameters="2;4,4;1,2;1,2" 
+  loopback_bw="100000000" loopback_lat="0"/>
+</AS>
+</platform>