ON-THE-FLY CANCELLATION OF UNNECESSARY READ REQUESTS

摘要

A method for a dispersed storage network (DSN) begins by receiving a data retrieval request for data stored as a plurality of sets of encoded data slices in a set of DS memory units. The method continues by selecting a read threshold number of DS units of the set of DS units. The method continues by facilitating sending read requests to the read threshold number of DS units. The method continues by receiving a decode threshold number of favorable read responses from a decode threshold number of DS units of the read threshold number of DS units. The method continues by facilitating canceling any pending read requests associated with other DS units of the read threshold number of DS units. The method continues by identifying any non-responding DS units of the other DS units to produce identified DS units and facilitating sending the identified DS units a read cancellation request.