def configure_fit(
self, rnd: int, parameters: Parameters,
client_manager: ClientManager) -> List[Tuple[ClientProxy, FitIns]]:
"""Configure the next round of training."""
config = {}
if self.on_fit_config_fn is not None:
# Custom fit config function provided
config = self.on_fit_config_fn(rnd)
fit_ins = FitIns(parameters, config)
# Sample clients
sample_size, min_num_clients = self.num_fit_clients(
client_manager.num_available())
clients = client_manager.sample(num_clients=sample_size,
min_num_clients=min_num_clients)
# Return client/config pairs
return [(client, fit_ins) for client in clients]
def test_fit_clients() -> None:
"""Test fit_clients."""
# Prepare
clients: List[ClientProxy] = [
FailingCLient("0"),
SuccessClient("1"),
]
arr = np.array([[1, 2], [3, 4], [5, 6]])
arr_serialized = ndarray_to_bytes(arr)
ins: FitIns = FitIns(Parameters(tensors=[arr_serialized], tensor_type=""), {})
client_instructions = [(c, ins) for c in clients]
# Execute
results, failures = fit_clients(client_instructions)
# Assert
assert len(results) == 1
assert len(failures) == 1
assert results[0][1].num_examples == 1
def configure_fit(
self, rnd: int, weights: Weights, client_manager: ClientManager
) -> List[Tuple[ClientProxy, FitIns]]:
"""Configure the next round of training."""
# Block until `min_num_clients` are available
sample_size, min_num_clients = self.num_fit_clients(
client_manager.num_available()
)
success = client_manager.wait_for(
num_clients=min_num_clients, timeout=WAIT_TIMEOUT
)
if not success:
# Do not continue if not enough clients are available
log(
INFO,
"FedFS: not enough clients available after timeout %s",
WAIT_TIMEOUT,
)
return []
# Sample clients
clients = self._contribution_based_sampling(
sample_size=sample_size, client_manager=client_manager
)
# Prepare parameters and config
parameters = weights_to_parameters(weights)
config = {}
if self.on_fit_config_fn is not None:
# Use custom fit config function if provided
config = self.on_fit_config_fn(rnd)
# Set timeout for this round
use_fast_timeout = is_fast_round(rnd - 1, self.r_fast, self.r_slow)
config["timeout"] = str(self.t_fast if use_fast_timeout else self.t_slow)
# Fit instructions
fit_ins = FitIns(parameters, config)
# Return client/config pairs
return [(client, fit_ins) for client in clients]
def configure_fit(
self, rnd: int, weights: Weights,
client_manager: ClientManager) -> List[Tuple[ClientProxy, FitIns]]:
"""Configure the next round of training."""
# Block until `min_num_clients` are available
sample_size, min_num_clients = self.num_fit_clients(
client_manager.num_available())
success = client_manager.wait_for(num_clients=min_num_clients,
timeout=WAIT_TIMEOUT)
if not success:
# Do not continue if not enough clients are available
log(
INFO,
"FedFS: not enough clients available after timeout %s",
WAIT_TIMEOUT,
)
return []
# Sample clients
msg = "FedFS round %s, sample %s clients (based on all previous contributions)"
if self.alternating_timeout:
log(
DEBUG,
msg,
str(rnd),
str(sample_size),
)
clients = self._contribution_based_sampling(
sample_size=sample_size, client_manager=client_manager)
elif self.importance_sampling:
if rnd == 1:
# Sample with 1/k in the first round
log(
DEBUG,
"FedFS round %s, sample %s clients with 1/k",
str(rnd),
str(sample_size),
)
clients = self._one_over_k_sampling(
sample_size=sample_size, client_manager=client_manager)
else:
fast_round = is_fast_round(rnd - 1,
r_fast=self.r_fast,
r_slow=self.r_slow)
log(
DEBUG,
"FedFS round %s, sample %s clients, fast_round %s",
str(rnd),
str(sample_size),
str(fast_round),
)
clients = self._fs_based_sampling(
sample_size=sample_size,
client_manager=client_manager,
fast_round=fast_round,
)
else:
clients = self._one_over_k_sampling(sample_size=sample_size,
client_manager=client_manager)
# Prepare parameters and config
parameters = weights_to_parameters(weights)
config = {}
if self.on_fit_config_fn is not None:
# Use custom fit config function if provided
config = self.on_fit_config_fn(rnd)
# Set timeout for this round
if self.dynamic_timeout:
if self.durations:
candidates = timeout_candidates(
durations=self.durations,
max_timeout=self.t_slow,
)
timeout = next_timeout(
candidates=candidates,
percentile=self.dynamic_timeout_percentile,
)
config["timeout"] = str(timeout)
else:
# Initial round has not past durations, use max_timeout
config["timeout"] = str(self.t_slow)
elif self.alternating_timeout:
use_fast_timeout = is_fast_round(rnd - 1, self.r_fast, self.r_slow)
config["timeout"] = str(
self.t_fast if use_fast_timeout else self.t_slow)
else:
config["timeout"] = str(self.t_slow)
# Fit instructions
fit_ins = FitIns(parameters, config)
# Return client/config pairs
return [(client, fit_ins) for client in clients]
