Any Guided Search implementation must include one or more MDEX query engines, which use proprietary data structures and algorithms to provide real-time responses to client requests. The process for a running MDEX engine is called a Dgraph. The performance of Dgraph is a major determining factor in the success of any Guided Search implementation that enables customers to use Guided Search.

You can use a single Dgraph or a set of load-balanced Dgraphs.