ray-project/ray ray-0.8.4

Ray 0.8.4

on GitHub

Highlight

• Add Python 3.8 support. (#7754)

Core

• Fix asycnio actor deserialization. (#7806)
• Fix importing Pyarrow lead to symbol collison segfault. (#7568)
• ray memory will collect statistics from all nodes. (#7721)
• Pin lineage of plasma objects that are still in scope. (#7690)

RLlib

• Add contextual bandit algorithms. (#7642)
• Add parameter noise exploration API. (#7772)
• Add scaling guide. (#7780)
• Enable restore keras model from h5 file. (#7482)
• Store tf-graph by default when doing Policy.export_model(). (#7759)
• Fix default policy overrides torch policy. (#7756, #7769)

RaySGD

• BREAKING: Add new API for tuning TorchTrainer using Tune. (#7547)
• BREAKING: Convert the head worker to a local model. (#7746)
• Added a new API for save/restore. (#7547)
• Add tqdm support to TorchTrainer. (#7588)

Tune

• Add sorted columns and TensorBoard to Tune tab. (#7140)
• Tune experiments can now be cancelled via the REST client. (#7719)
• fail_fast enables experiments to fail quickly. (#7528)
• override the IP retrieval process if needed. (#7705)
• TensorBoardX nested dictionary support. (#7705)

Serve

• Performance improvements:
  • Push route table updates to HTTP proxy. (#7774)
  • Improve serialization. (#7688)
• Add async methods support for serve actors. (#7682)
• Add multiple method support for serve actors. (#7709)
  • You can specify HTTP methods in serve.create_backend(..., methods=["GET", "POST"]).
  • The ability to specify which actor method to execute in HTTP through X-SERVE-CALL-METHOD header or in RayServeHandle through handle.options("method").remote(...).

Others

• Progress towards highly available control plane. (#7822, #7742)
• Progress towards Windows compatibility. (#7740, #7739, #7657)
• Progress towards Ray Streaming library. (#7813)
• Progress towards metrics export service. (#7809)
• Basic C++ worker implementation. (#6125)

Thanks

We thank the following contributors for their work on this release:

@carlbalmer, @BalaBalaYi, @saurabh3949, @maximsmol, @SongGuyang, @istoica, @pcmoritz, @aannadi, @kfstorm, @ijrsvt, @richardliaw, @mehrdadn, @wumuzi520, @cloudhan, @edoakes, @mitchellstern, @robertnishihara, @hhoke, @simon-mo, @ConeyLiu, @stephanie-wang, @rkooo567, @ffbin, @ericl, @hubcity, @sven1977