The online scheduling of parallel jobs on parallel machines is considered in this paper. Contrary to classical parallel machine scheduling problems, jobs may require processing on several machines in parallel. The standard metric for worst-case performance is the competitive ratio. By constructing certain adversary sequence, all the nine kinds of cases are analyzed. It is shown that 2.07 is a new lower bound on the competitive ratio of any online algorithm, which is better than the previous lower bound of 1...