... A Shared Global Event Propagation System to Enable Next Generation Distributed Services Paul Brett, Rob Knauerhase, Mic Bowman, Robert Adams, Aroon Nataraj, Jeff Sedayao, Michael Spindel ... PlanetLab nodes. Each instance of the service listens for events on a channel (recall that a channel is associated with each PlanetLab node) and saves the properties in an in-memory database. ... speaking, a channel is a name. Channel names are hierarchical, to enable prefix matches that enable subscription to a family of related channels. PsEPR does not enforce unique names for channels....