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"""Generator functions for all parameters that we fuzz when invoked with --fuzzMongodConfigs."""
import random
from buildscripts.resmokelib import utils
def generate_eviction_configs(rng):
"""Generate random configurations for wiredTigerEngineConfigString parameter."""
eviction_checkpoint_target = rng.randint(1, 99)
eviction_target = rng.randint(50, 95)
eviction_trigger = rng.randint(eviction_target + 1, 99)
eviction_dirty_target = rng.randint(5, 50)
eviction_dirty_trigger = rng.randint(eviction_dirty_target, 75)
close_idle_time_secs = rng.randint(1, 100)
close_handle_minimum = rng.randint(0, 1000)
close_scan_interval = rng.randint(1, 100)
return "eviction_checkpoint_target={0},eviction_dirty_target={1},eviction_dirty_trigger={2},"\
"eviction_target={3},eviction_trigger={4},file_manager=(close_handle_minimum={5},"\
"close_idle_time={6},close_scan_interval={7})".format(eviction_checkpoint_target,
eviction_dirty_target,
eviction_dirty_trigger,
eviction_target,
eviction_trigger,
close_handle_minimum,
close_idle_time_secs,
close_scan_interval)
def generate_flow_control_parameters(rng):
"""Generate parameters related to flow control and returns a dictionary."""
configs = {}
configs["enableFlowControl"] = rng.choice([True, False])
if not configs["enableFlowControl"]:
return configs
configs["flowControlTargetLagSeconds"] = rng.randint(1, 1000)
configs["flowControlThresholdLagPercentage"] = rng.random()
configs["flowControlMaxSamples"] = rng.randint(1, 1000 * 1000)
configs["flowControlSamplePeriod"] = rng.randint(1, 1000 * 1000)
configs["flowControlMinTicketsPerSecond"] = rng.randint(1, 10 * 1000)
return configs
def generate_independent_parameters(rng):
"""Return a dictionary with values for each independent parameter."""
ret = {}
ret["wiredTigerCursorCacheSize"] = rng.randint(-100, 100)
ret["wiredTigerSessionCloseIdleTimeSecs"] = rng.randint(0, 300)
ret["wiredTigerConcurrentWriteTransactions"] = rng.randint(16, 256)
ret["wiredTigerConcurrentReadTransactions"] = rng.randint(16, 256)
return ret
def fuzz_set_parameters(seed, user_provided_params):
"""Randomly generate mongod configurations and wiredTigerConnectionString."""
rng = random.Random(seed)
ret = {}
params = [generate_flow_control_parameters(rng), generate_independent_parameters(rng)]
for dct in params:
for key, value in dct.items():
ret[key] = value
for key, value in utils.load_yaml(user_provided_params).items():
ret[key] = value
return utils.dump_yaml(ret), generate_eviction_configs(rng)
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