2 <!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
3 <platform version="4.1">
4 <zone id="world" routing="Full">
5 <!-- this platform models 3 clusters, interconnected over the Internet
7 -- This example intends to be somewhat exhaustive, your platform should probably be simpler.
9 -- In particular, the clusters are modeled in very different ways,
10 -- but you should pick the way you prefer, and stick to it.
13 <!-- Here comes the first cluster, the simplest one.
15 Every nodes are connected through a private link to a router
16 (ie a machine that cannot host computations).
18 node-0.1core.org --[l0]--
20 node-1.1core.org --[l1]-- router -- (outer world)
22 node-7.1core.org --[l9]--
25 So the route from node-0 to node-1 is {l0.UP, l1.DOWN}
27 <cluster id="simple" prefix="node-" radical="0-7" suffix=".1core.org" speed="1Gf" bw="125MBps" lat="50us" />
30 <!-- This second cluster has a backbone link, connecting all private links:
32 node-0.2cores.org --[l0]-------+
34 node-1.2cores.org --[l1]--[backbone]-- router -- (outer world)
36 node-7.2cores.org --[l7]-------+
39 The route from node-0 to node-1 is: l0.UP ; backbone ; l1.DOWN
41 The route from node-0 to the outer world begins with: l0.UP ; backbone
43 <cluster id="backboned" prefix="node-" radical="0-7" suffix=".2cores.org"
45 bw="125MBps" lat="50us"
46 bb_bw="2.25GBps" bb_lat="500us"/>
49 <!-- This cluster has a backbone link, but no links are fullduplex.
50 -- It means that up and down communications compete as if they
51 -- were using exactly the same resource. If you send and receive
52 -- at the same time, then each get half of the bandwidth.
54 -- Also, the hosts have 4 cores.
56 <cluster id="halfduplex" prefix="node-" radical="0-7" suffix=".4cores.org" speed="1Gf" core="4"
57 bw="125MBps" lat="50us" sharing_policy="SHARED"
58 bb_bw="2.25GBps" bb_lat="500us" bb_sharing_policy="SHARED" />
61 <!-- And now, we create the routes between the clusters, ie inter-zone routes -->
63 <!-- We have only one outer link, representing the internet
64 -- Its sharing is FATPIPE, meaning that communications have no impact on each others.
65 -- Any given comm can use the full provided bandwidth.
67 -- This models the big links constituting the backbone of the internet,
68 -- that users cannot saturate.
69 -- Users' bandwidth is mostly limited by their outgoing connexion,
70 -- not by the network backbone. -->
72 <link id="backbone" bandwidth="1.25GBps" latency="500us" sharing_policy="FATPIPE"/>
74 <zoneRoute src="simple" dst="backboned"
75 gw_src="node-simple_router.1core.org"
76 gw_dst="node-backboned_router.2cores.org">
77 <link_ctn id="backbone" />
80 <zoneRoute src="simple" dst="halfduplex"
81 gw_src="node-simple_router.1core.org"
82 gw_dst="node-halfduplex_router.4cores.org">
83 <link_ctn id="backbone" />
86 <zoneRoute src="backboned" dst="halfduplex"
87 gw_src="node-backboned_router.2cores.org"
88 gw_dst="node-halfduplex_router.4cores.org">
89 <link_ctn id="backbone" />