In this paper we present C2Cfs - a decentralized collective caching architecture for distributed file systems. C2Cfs diverges from the traditional client-server model and advocates decoupling the consistency management role of the central server from the data serving role. Our design enables multiple client-side caches to share data and efficiently propagate updates via direct client-to-client transfers, while maintaining the standard consistency semantics. We present an NFSv4-based implementation of our architecture, which works with unmodified NFS servers and requires no changes to the protocol. Finally, we evaluate the implementation and demonstrate the performance benefits of decentralized data access enabled by our approach.

The Internet has evolved greatly from its original incarnation. For instance, the vast majority of current Internet usage is data retrieval and service access, whereas the architecture was designed around host-to-host applications such as telnet and ftp. Moreover, the original Internet was a purely transparent carrier of packets, but now the various network stakeholders use middleboxes to improve security and accelerate applications. To adapt to these changes, we propose the Data-Oriented Network Architecture (DONA), which involves a clean-slate redesign of Internet naming and name resolution.

This paper revisits a much explored topic in networking - the search for a simple yet fully-general multicast design. The many years of research into multicast routing have led to a generally pessimistic view that the complexity of multicast routing-and inter-domain multicast routing in particular - can only be overcome by restricting the service model (as in single-source) multicast. This paper proposes a new approach to implementing IP multicast that we hope leads to a reevaluation of this commonly held view.