Each of a multiple cursors is assigned a respective generator of multiple generators. The cursors are used to perform an operation on a set of logical unit numbers (LUN) associated with memory devices. Multiple sequences of LUNs are identified based on the generators. Each of the cursors is associated with one of the sequences of LUNs. The operation on the set of LUNs associated with the memory devices is performed using the sequences of LUNs. The operation on the set of LUNs is performed in an order provided by the sequences of LUNs to reduce a probability of collision by the cursors in the performance of the operation.