A recovery mechanism for errors caused by a late subjob in a system handling SLA-based Grid workflows

Supporting SLAs (Service Level Agreements) for Grid-based workflows requires providing mechanisms for handling errors (i.e., the failures of subjobs). In the context of this paper, we propose an error recovery mechanism which can handle one failed subjob of a workflow. The error recovery mechanism has a maximum of three phases, depending on the impact of the error. In each phase, we use a dedicated algorithm to remap the subjobs of the workflow to the resources. The main contributions of the paper are the error recovery mechanism for SLA-based workflows and the mapping algorithm G-map, which is used in the first phase of the recovery mechanism. The G-map remaps the groups of subjobs, which are directly affected by an error. The efficiency of the proposed algorithm is validated through simulation results.