133 lines
4.1 KiB
Python
133 lines
4.1 KiB
Python
from quoracle import *
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a = Node('a')
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b = Node('b')
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c = Node('c')
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d = Node('d')
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e = Node('e')
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f = Node('f')
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grid = QuorumSystem(reads=a*b*c + d*e*f)
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for r in grid.read_quorums():
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print(r)
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for w in grid.write_quorums():
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print(w)
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QuorumSystem(writes=(a + b + c) * (d + e + f))
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QuorumSystem(reads=a*b*c + d*e*f, writes=(a + b + c) * (d + e + f))
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# QuorumSystem(reads=a+b+c, writes=d+e+f)
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# ValueError: Not all read quorums intersect all write quorums
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print(grid.is_read_quorum({'a', 'b', 'c'})) # True
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print(grid.is_read_quorum({'a', 'b', 'c', 'd'})) # True
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print(grid.is_read_quorum({'a', 'b', 'd'})) # False
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print(grid.is_write_quorum({'a', 'd'})) # True
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print(grid.is_write_quorum({'a', 'd', 'd'})) # True
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print(grid.is_write_quorum({'a', 'b'})) # False
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print(grid.read_resilience()) # 1
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print(grid.write_resilience()) # 2
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print(grid.resilience()) # 1
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# The read quorum strategy.
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sigma_r = {
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frozenset({'a', 'b', 'c'}): 2.,
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frozenset({'d', 'e', 'f'}): 1.,
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}
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# The write quorum strategy.
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sigma_w = {
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frozenset({'a', 'd'}): 1.,
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frozenset({'b', 'e'}): 1.,
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frozenset({'c', 'f'}): 1.,
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}
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strategy = grid.make_strategy(sigma_r, sigma_w)
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print(strategy.get_read_quorum())
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print(strategy.get_read_quorum())
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print(strategy.get_read_quorum())
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print(strategy.get_read_quorum())
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print(strategy.get_write_quorum())
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print(strategy.get_write_quorum())
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print(strategy.get_write_quorum())
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print(strategy.get_write_quorum())
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print(strategy.load(read_fraction=1)) # 2/3
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print(strategy.load(write_fraction=1)) # 1/3
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print(strategy.load(read_fraction=0.25)) # 5/12
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print(strategy.node_load(a, read_fraction=0.25)) # 5/12
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print(strategy.node_load(b, read_fraction=0.25)) # 5/12
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print(strategy.node_load(c, read_fraction=0.25)) # 5/12
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print(strategy.node_load(d, read_fraction=0.25)) # 1/3
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print(strategy.node_load(e, read_fraction=0.25)) # 1/3
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print(strategy.node_load(f, read_fraction=0.25)) # 1/3
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strategy = grid.strategy(read_fraction=0.25)
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print(strategy)
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print(strategy.load(read_fraction=0.25)) # 3/8
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print(strategy.load(read_fraction=0)) # 1/3
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print(strategy.load(read_fraction=0.5)) # 5/12
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print(strategy.load(read_fraction=1)) # 1/2
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print(grid.load(read_fraction=0.25)) # 3/8
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print(grid.capacity(read_fraction=0.25)) # 8/3
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distribution = {0.1: 0.5, 0.75: 0.5}
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strategy = grid.strategy(read_fraction=distribution)
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print(strategy.load(read_fraction=distribution)) # 0.404
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a = Node('a', capacity=1000)
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b = Node('b', capacity=500)
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c = Node('c', capacity=1000)
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d = Node('d', capacity=500)
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e = Node('e', capacity=1000)
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f = Node('f', capacity=500)
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grid = QuorumSystem(reads=a*b*c + d*e*f)
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strategy = grid.strategy(read_fraction=0.75)
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print(strategy.load(read_fraction=0.75)) # 0.00075
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print(strategy.capacity(read_fraction=0.75)) # 1333
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a = Node('a', write_capacity=1000, read_capacity=10000)
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b = Node('b', write_capacity=500, read_capacity=5000)
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c = Node('c', write_capacity=1000, read_capacity=10000)
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d = Node('d', write_capacity=500, read_capacity=5000)
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e = Node('e', write_capacity=1000, read_capacity=10000)
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f = Node('f', write_capacity=500, read_capacity=5000)
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grid = QuorumSystem(reads=a*b*c + d*e*f)
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print(grid.capacity(read_fraction=1)) # 10,000
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print(grid.capacity(read_fraction=0.5)) # 3913
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print(grid.capacity(read_fraction=0)) # 2000
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strategy = grid.strategy(read_fraction=0.5, f=1)
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print(strategy.get_read_quorum())
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print(strategy.get_write_quorum())
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simple_majority = QuorumSystem(reads=majority([a, b, c, d, e]))
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crumbling_walls = QuorumSystem(reads=a*b + c*d*e)
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paths = QuorumSystem(reads=a*b + a*c*e + d*e + d*c*b)
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assert(simple_majority.resilience() >= 1)
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assert(crumbling_walls.resilience() >= 1)
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assert(paths.resilience() >= 1)
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distribution = {0.9: 0.9, 0.1: 0.1}
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print(simple_majority.capacity(read_fraction=distribution)) # 5089
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print(crumbling_walls.capacity(read_fraction=distribution)) # 5824
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print(paths.capacity(read_fraction=distribution)) # 5725
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print(simple_majority.capacity(read_fraction=distribution, f=1)) # 3816
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print(crumbling_walls.capacity(read_fraction=distribution, f=1)) # 1908
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print(paths.capacity(read_fraction=distribution, f=1)) # 1908
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