Patent ID: 8683259

Claim:
A method comprises: for each of a plurality of dispersed storage networks (DSNs) in a computing system network, identifying sets of dispersed storage (DS) units, wherein a set of the sets of DS unit stores an error coded data file; identifying a reference entity within the computing system network; for each of the plurality of DSNs: determining first data access performance information between the reference entity and a first one of the sets of DS units; and determining second data access performance information between the reference entity and a second one of the sets of DS units, wherein determining each of the first and second data access performance information includes: determining a likelihood of retrieving a decode threshold number of encoded data slices of at least a portion of the error coded data file; determining data retrieval access latency for retrieving the decode threshold number of encoded data slices; and generating the data access performance information based on the likelihood of retrieving the decode threshold number of encoded data slices and the data retrieval access latency; and storing the first and second data access performance information for each of the plurality of DSNs to produce system data access performance information.