1. A method comprising: receiving, via an electronic network, at a capabilities database, capabilities information, the capabilities information being representative of capabilities of respective nodes at a first hierarchical level in a hierarchically arranged data center, the respective nodes comprising a plurality of devices; summarizing the capabilities information to cluster the nodes based on groups of capabilities information, resulting in node clusters, wherein each node cluster is represented by a pair of values including a first value and a second value, and a count of devices in the cluster represented by the pair of values, wherein the first value is representative of a given capability and the second value is representative of a frequency of the given capability; generating a histogram that represents individual node clusters; and sending, via the electronic network, the histogram to a next higher level in the hierarchically arranged data center.