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; clustering the nodes by summarizing the capabilities information, resulting in node clusters, wherein each node cluster is represented by a plurality of capabilities, a first capability of the plurality of capabilities being indicated by a single value, and a second capability of the plurality of capabilities being indicated by a pair of values, and a count of devices in the cluster; and sending, via the electronic network, information representative of the node clusters to a next higher level in the hierarchically arranged data center.