def perform_experiment_phase_II(infrastructure_file,
workload_file,
year,
phase_I_solution,
output_file,
frac_gap=None,
max_seconds=10*60):
solution_I = lloovia.SolutionI.load(phase_I_solution)
if solution_I.solving_stats.status == "aborted":
# There is no solution of Phase I, so Phase II cannot
# be performed
print("Case '%s' has no solution for Phase I. Skipping" %
(phase_I_solution))
# Save empty dataframe as solution
pd.DataFrame().to_pickle(output_file)
return
problem = lloovia.Problem(load_infrastructure(infrastructure_file),
load_workload(workload_file, year))
solver = pulp.COIN(threads=2, fracGap=frac_gap,
maxSeconds=max_seconds, msg=1)
phaseII = lloovia.PhaseII(problem, solution_I, solver=solver)
phaseII.solve_period()
phaseII.solution.save(output_file)
def perform_experiment_multiregion_phase_II(
azure_infrastructure_file,
amazon_infrastructure_file,
workload_file,
year,
providers_to_use,
phase_I_solution,
output_file,
frac_gap=None,
max_seconds=10*60):
infrastructure = get_infrastructure_for_providers(
providers_to_use,
azure_infrastructure_file,
amazon_infrastructure_file
)
solution_I = lloovia.SolutionI.load(phase_I_solution)
if solution_I.solving_stats.status == "aborted":
print("Case '%s' has no solution for Phase I. Skipping" %
(phase_I_solution))
# Save empty dataframe as solution
pd.DataFrame().to_pickle(output_file)
return
problem = lloovia.Problem(infrastructure,
load_workload(workload_file, year))
solver = pulp.COIN(threads=2, fracGap=frac_gap,
maxSeconds=max_seconds, msg=1)
phaseII = lloovia.PhaseII(problem, solution_I, solver=solver)
phaseII.solve_period()
phaseII.solution.save(output_file)
def perform_experiment_phase_I(infrastructure_file,
workload_file,
year,
max_bins,
output_file,
frac_gap=0.01,
max_seconds=10*60):
problem = lloovia.Problem(load_infrastructure(infrastructure_file),
load_workload(workload_file, year))
phaseI = lloovia.PhaseI(problem)
solver = pulp.COIN(threads=2, fracGap=frac_gap,
maxSeconds=max_seconds, msg=1)
phaseI.solve(max_bins=max_bins, solver=solver)
phaseI.solution.save(output_file)
def prepare_problems(self, workload_phase_i, workload_phase_ii):
'''Creates a problem for phase I and another for phase II as fields
of the class. They use the workload from the parameters. The instances
are stored in self.instances.'''
ls_us_east = lloovia.LimitingSet("US East (N. California)",
max_vms=20,
max_cores=0)
ls_us_west_m4 = lloovia.LimitingSet("us_west_m4",
max_vms=5,
max_cores=0)
ic1 = lloovia.InstanceClass(name="m3.large",
cloud=ls_us_east,
max_vms=20,
reserved=True,
price=2.3,
performance=5)
ic2 = lloovia.InstanceClass(name="m4.medium",
cloud=ls_us_west_m4,
max_vms=5,
reserved=False,
price=4.5,
performance=6)
ic3 = lloovia.InstanceClass(name="m4.large",
cloud=ls_us_west_m4,
max_vms=5,
reserved=False,
price=8.2,
performance=7)
self.instances = [ic1, ic2, ic3]
self.problem_phase_i = lloovia.Problem(instances=self.instances,
workload=workload_phase_i)
self.problem_phase_ii = lloovia.Problem(instances=self.instances,
workload=workload_phase_ii)
def perform_experiment_multiregion_phase_I(
azure_infrastructure_file,
amazon_infrastructure_file,
workload_file,
year,
max_bins,
providers_to_use,
output_file,
frac_gap=None,
max_seconds=60*60):
infrastructure = get_infrastructure_for_providers(
providers_to_use,
azure_infrastructure_file,
amazon_infrastructure_file
)
problem = lloovia.Problem(infrastructure,
load_workload(workload_file, year))
phaseI = lloovia.PhaseI(problem)
solver = pulp.COIN(threads=2, fracGap=frac_gap,
maxSeconds=max_seconds, msg=1)
phaseI.solve(max_bins=max_bins, solver=solver)
phaseI.solution.save(output_file)
def perform_experiment_phase_II_od_only(infrastructure_file,
workload_file,
year,
output_file,
frac_gap=None,
max_seconds=10*60):
infrastructure = load_infrastructure(infrastructure_file)
only_ondemand = [vm for vm in infrastructure if not vm.reserved]
only_reserved = [vm for vm in infrastructure if vm.reserved]
problem = lloovia.Problem(only_ondemand,
load_workload(workload_file, year))
# Create a fake solution from phase I in which all reserved
# instances are deactivated
trivial_stats = lloovia.SolvingStatsI(
max_bins=None,
workload=lloovia.LlooviaHistogram({0: 0}),
frac_gap=None,
max_seconds=None,
creation_time=0.0,
solving_time=0.0,
status="optimal",
lower_bound=None,
optimal_cost=0.0
)
# Solution: Zero reserved VMs of each type
sol = dict((vm, 0) for vm in only_reserved)
trivial_allocation = pd.DataFrame([sol])[only_reserved]
trivial_solution = lloovia.Solution(problem, trivial_stats,
allocation=trivial_allocation)
solver = pulp.COIN(threads=2, fracGap=frac_gap,
maxSeconds=max_seconds, msg=1)
phaseII = lloovia.PhaseII(problem, trivial_solution, solver=solver)
phaseII.solve_period()
phaseII.solution.save(output_file)
