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[ASHA][docs] Change default value of "brackets" (#9101)

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Closes #9058
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goulou
2020-06-23 23:43:27 +02:00
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parent acb7270bd7
commit 9b4428c668
1 changed files with 3 additions and 1 deletions
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doc/source/tune/api_docs/schedulers.rst
+3 -1
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@@ -66,11 +66,13 @@ The `ASHA <https://openreview.net/forum?id=S1Y7OOlRZ>`__ scheduler can be used b
max_t=100,
grace_period=10,
reduction_factor=3,
brackets=3)
brackets=1)
tune.run( ... , scheduler=asha_scheduler)
Compared to the original version of HyperBand, this implementation provides better parallelism and avoids straggler issues during eliminations. **We recommend using this over the standard HyperBand scheduler.** An example of this can be `found here <https://github.com/ray-project/ray/blob/master/python/ray/tune/examples/async_hyperband_example.py>`_.
Even though the original paper mentions a bracket count of 3, discussions with the authors concluded that the value should be left to 1 bracket. This is the default used if no value is provided for the ``brackets`` argument.
.. autoclass:: ray.tune.schedulers.AsyncHyperBandScheduler
.. autoclass:: ray.tune.schedulers.ASHAScheduler