Utility#

`ray.util.ActorPool`	Utility class to operate on a fixed pool of actors.
`ray.util.queue.Queue`	A first-in, first-out queue implementation on Ray.
`ray.util.list_named_actors`	List all named actors in the system.
`ray.util.serialization.register_serializer`	Use the given serializer to serialize instances of type `cls`, and use the deserializer to deserialize the serialized object.
`ray.util.serialization.deregister_serializer`	Deregister the serializer associated with the type `cls`.
`ray.util.accelerators.tpu.get_current_pod_worker_count`	Count the number of workers associated with the TPU pod that the worker belongs to.
`ray.util.accelerators.tpu.get_current_pod_name`	Return the name of the TPU pod that the worker is a part of.
`ray.nodes`	Get a list of the nodes in the cluster (for debugging only).
`ray.cluster_resources`	Get the current total cluster resources.
`ray.available_resources`	Get the current available cluster resources.
`ray.util.queue.Empty`	PublicAPI (beta): This API is in beta and may change before becoming stable.
`ray.util.queue.Full`	PublicAPI (beta): This API is in beta and may change before becoming stable.

Custom Metrics#

`ray.util.metrics.Counter`	A cumulative metric that is monotonically increasing.
`ray.util.metrics.Gauge`	Gauges keep the last recorded value and drop everything before.
`ray.util.metrics.Histogram`	Tracks the size and number of events in buckets.

`ray.util.rpdb.set_trace`	Interrupt the flow of the program and drop into the Ray debugger.
`ray.util.inspect_serializability`	Identifies what objects are preventing serialization.
`ray.timeline`	Return a list of profiling events that can viewed as a timeline.