/usr/share/doc/ray/Documentation/Routing.txt is in ray-doc 2.3.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | For very large jobs, routing should be enabled.
Message routing reduces the latency and memory usage.
Also, the network will by happier.
This guide contains virtual network architectures for routing messages with Ray.
Vertices is the number of computer cores to use (mpiexec -n ###)
See also Documentation/Very-Large-Jobs.txt.
## Convex regular polytope
Messages can be routed with a polytope using
the polytope connection type. A hypercube is a polytope with radix
of 2. The connection types 'polytope' and 'hypercube' use the same code
path so they are equivalent.
The basic relation for edges is that only 1 dimension can be different.
Example: <0,1,2> -> <0,2,2>
For the convex regular polytope, we have
Vertices:= Radix^Dimension
Degree:= (Radix-1)*Dimension
Vertices: 64
Type: Polytope
Radix: 8
Dimension: 2
Degree: 14
Options: -route-messages -connection-type polytope -routing-graph-degree 14
Vertices: 512
Type: Polytope
Radix: 8
Dimension: 3 (8^3=512)
Degree: 21=(8-1)*3
Options: -route-messages -connection-type polytope -routing-graph-degree 21
Vertices: 1024 = 32*32
Type: Polytope
Radix: 32
Dimension: 2 (32^2=1024)
Degree: 62 = (32-1)*2
Options: -route-messages -connection-type polytope -routing-graph-degree 62
Vertices: 1024
Type: Polytope
Radix: 2
Dimension: 10 (2^10=1024)
Degree: 10
Options: -route-messages -connection-type polytope -routing-graph-degree 10
Vertices: 2025 (45 ^ 2)
Type: Polytope
Radix: 45
Dimension: 2
Degree: 88 ((45 - 1 ) * 2)
Options: -route-messages -connection-type polytope -routing-graph-degree 88
Vertices: 4225 = 65*65
Type: Polytope
Degree: 128 = (65-1)*2
Diameter: 2 (65^2=1024)
Options: -route-messages -connection-type polytope -routing-graph-degree 128
## Torus
Type: torus
Radix: 8
Dimension: 3
Vertices: Radix^Dimension = 512
Degree: 2*Dimension = 6
Options: -route-messages -connection-type torus -routing-graph-degree 6
Type: torus
Radix: 4
Dimension: 5
Vertices: Radix^Dimension = 1024
Degree: 2*Dimension = 10
Options: -route-messages -connection-type torus -routing-graph-degree 10
## de Bruijn
Vertices: 256
Type: de Bruijn
Degree: 4
Diameter: 4 (4*4*4*4=256)
Options: -route-messages -connection-type debruijn -routing-graph-degree 4
Vertices: 512
Type: de Bruijn
Degree: 8
Diameter: 3 (8*8*8)
Options: -route-messages -connection-type debruijn -routing-graph-degree 8
Vertices: 1024
Type: de Bruijn
Degree: 4
Diameter: 5 (4*4*4*4*4)
Options: -route-messages -connection-type debruijn -routing-graph-degree 4
Vertices: 1024
Type: de Bruijn
Degree: 32
Diameter: 2 (32*32)
Options: -route-messages -connection-type debruijn -routing-graph-degree 32
Vertices: 1024
Type: de Bruijn
Degree: 2
Diameter: 10 (2^10)
Options: -route-messages -connection-type debruijn -routing-graph-degree 2
## Kautz
Vertices: 750
Type: Kautz
Degree: 5
Diameter: 4 (6*5*5*5)
Options: -route-messages -connection-type kautz -routing-graph-degree 5
Vertices: 972
Type: Kautz
Degree: 3
Diameter: 6 (4*3*3*3*3*3)
Options: -route-messages -connection-type kautz -routing-graph-degree 3
Vertices: 768
Type: Kautz
Degree: 2
Diameter: 9 (3*2*2*2*2*2*2*2*2)
Options: -route-messages -connection-type kautz -routing-graph-degree 2
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