Amazon.com, Inc.
Affinity-based routing and execution for workflow service

Abstract:

A workflow service implements policies to leverage affinities to improve system performance. Example types of policies include a parent activity affinity (e.g., data for a task already exists locally to a node), a resource group affinity (e.g., a task requires a particular type of resource capability), or a code affinity (e.g., necessary code for the task is already stored locally to a node). A node for a particular task is selected based on an affinity policy or policy statement (e.g., the type indicated in a policy of a workflow definition) and configuration information, and the task routed to the selected node.