1. A content delivery framework (CDF) comprising a plurality of devices, each device comprising hardware including memory and at least one processor, each device configured to run at least one content delivery (CD) service of a plurality of CD services, wherein (A) said plurality of CD services comprise: collector services, reducer services, and control services; and wherein (B) (i) at least some CD services are configured to obtain control input from other CD services, and (ii) at least some CD services are configured to produce control output for other CD services; and (iii) at least some CD services are configured to obtain state input from other CD services, and (iv) at least some CD services are configured to produce state output for other CD services; and (v) at least some CD services are configured to obtain event input from other CD services, and (vi) at least some CD services are configured to produce event output for other CD services; and (C) at least some of said CD services produce, as event output, one or more event streams relating to their respective operation; and (D) at least some of said event output is provided to at least some of said reducer services as event input to said reducer services; and (E) at least some of said reducer services: (E)(1) determine their respective reducer output based on their event input, and (E)(2) provide their respective reducer output to at least some collector services; and (F) at least some of said collector services: (F)(1) obtain their event input from one or more reducer services, and (F)(2) produce, as their respective state output, state information, said state information being based on said event input from said one or more reducer services, and (F)(3) provide at least some of said state information to said control services, and (F)(4) provide at least some of said state information to other CD services; and (G) at least some of said control services: (G)(1) obtain state information from said collector services as their respective state input and (G)(2) produce control information based on said state information from said collector services; and (G)(3) provide control information to at least some of said CD services to control operation or configuration of said at least some of said CD services, wherein at least some of said control information provided to control operation or configuration of said at least some CD services was based on specific event information produced by at least one of said CD services, and wherein said plurality of CD services comprise one or more CD service networks, and wherein each particular CD service network has a dynamic network topology, and wherein the network topology of the particular CD service network is updated based on one or more of: (i) control information from the control services, and (ii) state information from the collector services.