Before revision: The response time of jobs with multiple parallel tasks  is a critical performance metric in many systems, including MapReduce systems, coded data storage systems, etc. However, tight analytical characterizations of the response time of such jobs are largely unknown except for highly degenerate cases. The difficulty is rooted in the fact that a job with multiple tasks is considered complete only when all of its tasks complete processing;
After revision: The response time of jobs with multiple parallel tasks is a critical performance metric in a wide range of applications such as data file retrieval in coded storage systems and parallel computing. In this problem, each job is completed only when all of its tasks complete processing;