Abstract:
Methods, systems, and apparatus are described for managing metadata for a distributed processing system. In one aspect, a method includes receiving a computation specification that includes a set of grains that specifies an initial state for a computation that is to be performed by a distributed processing system, wherein each grain comprises metadata that specifies a portion of the initial state for the computation; storing a grain hierarchy that represents a state for the computation based on a grain type associated with each grain, the grain hierarchy comprising subscription grains for subscriptions for the grain hierarchy, each subscription corresponding to one or more grains included in the grain hierarchy, and each subscription specifying one or more actions to be performed by the hub device; and performing, during performance of the computation, at least one of the actions specified by at least one of the subscriptions.
Abstract:
A manager agent access a grain hierarchy that represents a state for a computation that is to performed by a distributed processing system, wherein the grain hierarchy includes manager agent grains including metadata for manager agent processes that manage the performance of the computation by the distributed processing system, and worker agent grains including, for tasks to be performed by the distributed processing system, metadata for worker agents that each correspond to a subset of the plurality of data processors for performing the task. A manager agent performs processes defined by a manager agent grain to manage the computation by worker agents and storing, within the grain, metadata describing the manager agent process performed by the manager agent, and worker agents perform tasks assigned to the worker agents based on an assignment of a respective worker agent grain to the worker agent.
Abstract:
Methods, systems, and apparatus are described for managing metadata for a distributed processing system. In one aspect, a method includes receiving a computation specification that includes a set of grains that specifies an initial state for a computation that is to be performed by a distributed processing system, wherein each grain comprises metadata that specifies a portion of the initial state for the computation; storing a grain hierarchy that represents a state for the computation based on a grain type associated with each grain, the grain hierarchy comprising subscription grains for subscriptions for the grain hierarchy, each subscription corresponding to one or more grains included in the grain hierarchy, and each subscription specifying one or more actions to be performed by the hub device; and performing, during performance of the computation, at least one of the actions specified by at least one of the subscriptions.