Dynamic pool reallocation performed by the following steps: (i) defining a plurality of resource pools including a first pool and a second pool, where each resource pool has a plurality of assigned resources; (ii) receiving a plurality of jobs to be executed; (iii) for each job of the plurality of jobs, assigning a respective resource pool, of the plurality of resource pools, to be used in completing the job; (iv) determining a preliminary schedule for executing the jobs on their respective resource pools; (v) determining whether the preliminary schedule will cause any jobs to miss service level agreement (SLA) deadlines corresponding to the job; (vi) executing the plurality of jobs on their respectively assigned resource pools; and (vii) re-assigning first resource from the second pool to the first pool during at least some of the time of the execution of the first job by the first resource pool.