ray-0.6.3

Core

• Initial work on porting the build system to Bazel. #3918, #3806, #3867, #3842
• Allow starting Ray processes inside valgrind, gdb, tmux. #3824, #3847
• Stability improvements and bug fixes. #3861, #3962, #3958, #3855, #3736, #3822, #3821, #3925
• Convert Python C extensions to Cython. #3541
• ray start can now be used to start Java workers. #3838, #3852
• Enable LZ4 compression in pyarrow build. #3931
• Update Redis to version 5.0.3. #3886
• Use one memory-mapped file for Plasma store. #3871,

Tune

• Support for BayesOpt. #3864
• Support for SigOpt. #3844
• Support executing infinite recovery retries for a trial. #3901
• Support export_formats option to export policy graphs. #3868
• Cluster and logging improvements. #3906

RLlib

• Support for Asynchronous Proximal Policy Optimization (APPO). #3779
• Support for MARWIL. #3635
• Support for evaluation option in DQN. #3835
• Bug fixes. #3865, #3810, #3938
• Annotations for API stability. #3808

Autoscaler and Cluster Setup

• Faster cluster launch and update. #3720
• Bug fixes. #3916, #3860, #3937, #3782, #3969
• Kubernetes configuration improvements. #3875, #3909

Modin

• Update Modin to 0.3.0. #3936
  • Modin 0.3.0 release notes

Known Issues

• Object broadcasts on large clusters are inefficient. #2945