From 2788376d8fe9712c102b8d3b78f66dba3cf96a0e Mon Sep 17 00:00:00 2001 From: Robert Nishihara Date: Sat, 7 Jul 2018 17:31:13 -0700 Subject: [PATCH] Add 0.5 release notes. (#2365) * Add 0.5 release notes. * Add note. * Add note about Modin. * Add vectorized environments note. * Link to PR instead of commit. * Add autoscaler link. * syntax --- .../2018-07-06-ray-0.5-release.markdown | 82 +++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 site/_posts/2018-07-06-ray-0.5-release.markdown diff --git a/site/_posts/2018-07-06-ray-0.5-release.markdown b/site/_posts/2018-07-06-ray-0.5-release.markdown new file mode 100644 index 000000000..16c2d9785 --- /dev/null +++ b/site/_posts/2018-07-06-ray-0.5-release.markdown @@ -0,0 +1,82 @@ +--- +layout: post +title: "Ray: 0.5 Release" +excerpt: "This post announces the release of Ray 0.5." +date: 2018-07-06 14:00:00 +--- + +We are pleased to announce the 0.5 release of [Ray][1]. To upgrade to the latest +version, run + +``` +pip install -U ray +``` + +## Refactoring + +One primary development is a substantial refactoring of the backend, which is +currently off by default, but can be turned on by starting Ray with the +environment variable `RAY_USE_XRAY=1`. This will be turned on soon after more +testing and development and will be on by default in the next release. Some +highlights of the refactor include the following: +- Merging the "local scheduler" and the "plasma manager" into a single "raylet" + process (consisting of a "node manager" and an "object manager"). +- Faster object transfers by using multiple threads to send objects in chunks. +- The introduction of a "lineage cache" to improve latency by removing the + global control store from the scheduling critical path. +- The removal of the global scheduler (which is replaced by direct node-manager + to node-manager communication) +- Providing a standardized table-based interface to the Redis-backed global + control store. +- A preliminary approach for automatically flushing global control store + metadata to avoid out-of-memory errors for long-running jobs. +Note that the refactoring is currently under development and does not yet +support fault tolerance. + +## RLlib Improvements + +A number of improvements have been made to [RLlib][2]: +- Added DDPG [[1877]](https://github.com/ray-project/ray/pull/1877). +- Added a policy server example [[2232]](https://github.com/ray-project/ray/pull/2232). +- Multi-agent support [[2286]](https://github.com/ray-project/ray/pull/2286). +- Modular policy graphs [[2294]](https://github.com/ray-project/ray/pull/2294). +- RNN support [[2299]](https://github.com/ray-project/ray/pull/2299). +- Vectorized environments [[2170]](https://github.com/ray-project/ray/pull/2170). +- Many bug fixes. + +## Tune + +A number of improvements have been made to [Tune][3]: +- HyperOpt integration [[1763]](https://github.com/ray-project/ray/pull/1763). +- Many bug fixes and improvements. + +## Pandas on Ray + +Pandas on Ray has moved to the [Modin][5] project and will continue to be +developed there. + +## Autoscaler + +The [autoscaler][6] has grown more mature and now supports Google Cloud +Platform: +- Support for GCP [[2061]](https://github.com/ray-project/ray/pull/2061). +- Many bug fixes and additional features. + +## Java + +Ray now supports Java thanks to contributions from [Ant Financial][4]: +- Support for Java (e.g., [[2092]](https://github.com/ray-project/ray/pull/2092) [[2094]](https://github.com/ray-project/ray/pull/2094) [[2151]](https://github.com/ray-project/ray/pull/2151) [[2171]](https://github.com/ray-project/ray/pull/2171) [[2225]](https://github.com/ray-project/ray/pull/2225) [[2245]](https://github.com/ray-project/ray/pull/2245)). + +## Other Features + +- A named actors prototype [[2129]](https://github.com/ray-project/ray/pull/2129). +- Usage of airspeed velocity for regression testing [[2113]](https://github.com/ray-project/ray/pull/2113). +- More efficient serialization of numpy arrays [[1889]](https://github.com/ray-project/ray/pull/1889). + + +[1]: https://github.com/ray-project/ray +[2]: http://ray.readthedocs.io/en/latest/rllib.html +[3]: http://ray.readthedocs.io/en/latest/tune.html +[4]: https://www.antfin.com/ +[5]: https://github.com/modin-project/modin +[6]: http://ray.readthedocs.io/en/latest/autoscaling.html