Understanding the unique framework by which Condor matches submitted jobs with machines is the key to getting the most from Condor's scheduling algorithm. Condor simplifies job submission by acting as a matchmaker of ClassAds.
Sellers advertise specifics about what they have to sell, hoping to attract a buyer.
Buyers may advertise specifics about what they wish to purchase. Both buyers and sellers list constraints that need to be satisfied. For instance, a buyer has a maximum spending limit, and a seller requires a minimum purchase price. Furthermore, both want to rank requests to their own advantage. In Condor, users submitting jobs can be thought of as buyers of compute resources and machine owners are sellers.