1. A device comprising non-transitory computer readable memory having computer executable instructions stored therein that when executed by a computing system cause the computing system to perform operations comprising: receiving at a first performance management appliance a request for a performance report associated with a first computing device and a second computing device; at the first performance management appliance, querying mapping data identifying the first performance management appliance has data stored therein relating to the operation of the first computing device and a second performance management appliance has data stored thereon relating to the operation of a second computing device; wherein the first performance management appliance and the second performance management appliance comprise peer appliances; processing a local request for first performance data that corresponds to the first computing device; sending to the second performance management appliance a remote request for second performance data that corresponds to the second computing device; and generating the report based on the first performance data and the second performance data.