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Parse worker-saturation if a string #7064

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merged 2 commits into from
Sep 27, 2022
Merged

Parse worker-saturation if a string #7064

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a8a4dd7
Parse `worker-saturation` if a string
gjoseph92 Sep 23, 2022
c9c2d15
fix test
gjoseph92 Sep 23, 2022
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11 changes: 8 additions & 3 deletions distributed/scheduler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1457,9 +1457,14 @@ def __init__(
dask.config.get("distributed.worker.memory.rebalance.sender-recipient-gap")
/ 2.0
)
self.WORKER_SATURATION = dask.config.get(
"distributed.scheduler.worker-saturation"
)

sat = dask.config.get("distributed.scheduler.worker-saturation")
try:
self.WORKER_SATURATION = float(sat)
except ValueError:
raise ValueError(
f"Unsupported `distributed.scheduler.worker-saturation` value {sat!r}. Must be a float."
)
self.transition_counter = 0
self._idle_transition_counter = 0
self.transition_counter_max = transition_counter_max
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16 changes: 13 additions & 3 deletions distributed/tests/test_scheduler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -410,9 +410,10 @@ async def test_queued_remove_add_worker(c, s, a, b):


@pytest.mark.parametrize(
"saturation, expected_task_counts",
"saturation_config, expected_task_counts",
[
(2.5, (5, 2)),
("2.5", (5, 2)),
(2.0, (4, 2)),
(1.0, (2, 1)),
(-1.0, (1, 1)),
Expand All @@ -421,16 +422,17 @@ async def test_queued_remove_add_worker(c, s, a, b):
],
)
def test_saturation_factor(
saturation: int | float, expected_task_counts: tuple[int, int]
saturation_config: int | float | str, expected_task_counts: tuple[int, int]
) -> None:
@gen_cluster(
client=True,
nthreads=[("", 2), ("", 1)],
config={
"distributed.scheduler.worker-saturation": saturation,
"distributed.scheduler.worker-saturation": saturation_config,
},
)
async def _test_saturation_factor(c, s, a, b):
saturation = float(saturation_config)
event = Event()
fs = c.map(
lambda _: event.wait(), range(10), key=[f"wait-{i}" for i in range(10)]
Expand All @@ -453,6 +455,14 @@ async def _test_saturation_factor(c, s, a, b):
_test_saturation_factor()


@gen_test()
async def test_bad_saturation_factor():
with pytest.raises(ValueError, match="foo"):
with dask.config.set({"distributed.scheduler.worker-saturation": "foo"}):
async with Scheduler(dashboard_address=":0", validate=True):
pass


@gen_cluster(client=True, nthreads=[("127.0.0.1", 1)] * 3)
async def test_move_data_over_break_restrictions(client, s, a, b, c):
[x] = await client.scatter([1], workers=b.address)
Expand Down