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JXTA

JXTA. CMT 607 :Distributed Computing Systems. JXTA Introduction. Begun by Sun Microsystems,2001 An open network computing platform designed for peer-to-peer (P2P) computing. Peers can cooperate to form self-organized and self-configured peer groups (virtual overlay network).

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JXTA

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  1. JXTA CMT 607 :Distributed Computing Systems

  2. JXTA Introduction • Begun by Sun Microsystems,2001 • An open network computing platform designed for peer-to-peer (P2P) computing. • Peers can cooperate to form self-organized and self-configured peer groups (virtual overlay network). • Operating systems and programming languages independent

  3. JXTA Services and Applications • Distributed storage and data sharing Search, indexing and file sharing • Large scale distributed computing • P2P messaging and collaboration tools

  4. JXTA Implementation Platforms • JXTA-J2SE Implementation (J2SE 1.4.1) • Full Implementation of JXTA Protocols • Tutorials and Programmer Guide • JXTA-C – recent results • JXTA 2.0 compliant • TCP transport • Others: Objective-C, Perl, Ruby, .Net

  5. JXTA Virtual Network

  6. JXTA Protocol Stack Pipe Binding Protocol Peer Discovery Protocol Peer Info Protocol Peer Resolver Protocol Peer Endpoint Protocol Peer Rendezvous Protocol

  7. JXTA Technology (1) • Peer Resolver Protocol (PRP) Provide a resolution service, used to send query and receive response. • Peer Information Protocol (PIP) Used to obtain a peer status information • Rendezvous Protocol(RP) used to propagate message within a peer group

  8. JXTA Technology(2) • Peer Discovery Protocol(PDP) used to discover resource within a group • Pipe Binding Protocol(PBP) is used to create a pipe between two peer (virtual communication channel) • Endpoint Routing Protocol(ERP) is used for routing The most important protocols are PRP and ERP

  9. DHT-based Resource Discovery • Edge peers publish indices of advertisements across Rdv network using Distributed Hash Tables (DHT) • DHTs are maintained by Rendezvous peers • Queries are directed to appropriate Rdv • If not found, a walk of the Rdv web is performed • Hash functions are pluggable

  10. Loosely-Consistent DHT • Peers have high churn rate • Maintaining a consistent distributed index outweight the advantages of having one • Network crawling is expensive but does not have any maintenance cost

  11. JXTA Shell Peer Commands P2P Software Architecture Sun JXTAApplications JXTA Applications Community JXTA Applications Sun JXTA Services Indexing Searching File sharing Core JXTA Services Indexing Searching JXTAServices Community JXTA Services Peer Monitoring Peer Groups Peer Pipes JXTA Core Security Security Any Peer on the Expanded Web

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