Improving Workflow Fault Tolerance through Provenance-Based Recovery

摘要

Scientific workflow systems frequently are used to execute a variety of long-running computational pipelines prone to premature termination due to network failures, server outages, and other faults. Researchers have presented approaches for providing fault tolerance for portions of specific workflows, but no solution handles faults that terminate the workflow engine itself when executing a mix of stateless and stateful workflow components. Here we present a general framework for efficiently resuming workflow execution using information commonly captured by workflow systems to record data provenance. Our approach facilitates fast workflow replay using only such commonly recorded provenance data. We also propose a checkpoint extension to standard provenance models to significantly reduce the computation needed to reset the workflow to a consistent state, thus resulting in much shorter re-execution times. Our work generalizes the rescue-DAG approach used by DAGMan to richer workflow models that may contain stateless and stateful multi-invocation actors as well as workflow loops.