1. A method for execution by a computing device of a dispersed storage network (DSN), the method comprises: determining whether a DSN access request involves an iterative storage unit access process; and when the DSN access request involves the iterative storage unit access process: determining, based on configuration of a plurality of storage units storing data objects associated with the DSN access request, that a storage unit of the plurality of storage units is capable of executing at least a portion of the iterative storage unit access process better than the computing device; sending the DSN access request and a control command to the storage unit, wherein the control command instructs the storage unit to perform at least a portion of the iterative storage unit access process; and receiving, from the storage unit, at least a partial response to the DSN access request.