APPA

APPA

http://www.sciences.univ-nantes.fr/lina/gdd/appa

"APPA (Atlas Peer-to-Peer Architecture) is a data management system that provides scalability, availability and performance for P2P advanced applications, which must deal with semantically rich data (e.g. XML documents, relational tables, etc.) using a high-level SQL-like query language.

APPA has a layered service-based architecture. Besides the traditional advantages of using services (encapsulation, reuse, portability, etc.), this enables APPA to be network-independent so it can be imple mented over different structured (e.g. DHT) and super-peer P2P networks.

The main rea son for this choice is to be able to exploit rapid and continuing progress in P2P networks. Another reason is that it is unlikely that a single P2P network design will be able to address the specific requirements of many different applications."