PrFQ (Probabilstic Fair Queueing) is a new probabilistic approach for packet fair scheduling.
The scalable fault tolerant Video-on-Demand Service exploits Transis for achieving the fault tolerance, and the MMTS attitude for incorporating QoS. Other collaborative applications that exploit Transis include a shared white-board, a distributed MIDI jam session, and a distibuted window manager that allows sharing of X windows.
Caelum is a comprehensive toolkit for the development of highly available groupware and CSCW applications, using the MMTS as a building block; it provides efficient tools for maintaining consistency of distributed and replicated information in the face of faults. Examples of such services are state transfer, object replication (the porotocls of COReL and robust replication), a dynamic voting scheme for primary components and atomic commit.
The former efforts of specifying particular services of a group communication system are Extended Virtual Synchrony definition and A Framework for Partitionable Membership Service. The applications that exploit these services are described in state transfer and object replication works (the protocols of COReL and robust replication). More effort is put now in order to collect the pieces together, to provide more strict and correct specifications, to explain and illustrate things that have not found a proper expression in related work till now.