thm description In this section, we give details of the implementation of the non-traditional stack of Figure 5, with a k-committee. This approach bears resemblance to Kaashoek’s token based approac=-=h [20]-=-, and the serverbased approach of [21], although there are algorithmic differences. Each multicast from a sender member goes through the stages shown in Figure 7. The Vsync layer at the sender first s