1. A processor-implemented method of managing nodes in a graph database, the processor-implemented method comprising: receiving, by the processor, a data stream that describes graph nodes in a graph database; defining, by the processor, multiple graph node clusters from the graph nodes in the graph database; and generating, by the processor, a cluster edge between two graph node clusters from the multiple graph node clusters in the graph database, wherein the cluster edge describes a relationship between the two graph node clusters.