This volume of the Lecture Notes in Computer Science series contains all the papersacceptedforpresentationatthe13thIFIP/IEEEInternationalWorkshop on Distributed Systems: Operations and Management (DSOM 2004), which was held at the University of California, Davis during November 15-17, 2004. DSOM2004wasthe?fteenthworkshopinaseriesofannualworkshopsandit followed in the footsteps of highly successful previous meetings, the most recent of which were held in Heidelberg, Germany (DSOM 2003), Montreal, Canada (DSOM 2002), Nancy, France (DSOM 2001), and Austin, USA (DSOM 2000). The goal of the DSOM...