A method, executed by a computer, includes determining an access metric, an input/output operations per second (IOPs) metric, and a size metric for each data target of a plurality of data targets, ranking the plurality of data targets according to the access metric of each data target, assigning each data target to a storage pool of a plurality of storage pools according to the IOPs metric and the size metric of the data target. A computer system and computer program product corresponding to the above method are also disclosed herein.