Presented By: Niharjyoti Sarangi

Transcription

1 Presented By: Niharjyoti Sarangi

2 INTRODUCTION WHAT & WHY KEY FEATURES JXTA ARCHITECTURE JXTA LAYERS JXTA JARGONS JXTA PROTOCOLS JXTA SHELLS JXTA ADVANTAGES 2

3 AN OPEN P2P PROTOCOL IMPLEMENTATION ON ANY NETWORED GADGET OPEN SOURCE PROJECT BEGUN BY SUN MICROSYSTEMS 3

4 MISSING STANDARD SET OF PROTOCOLS ONLY P2P P/C TO WORK COLLABORATIVELY & INDEPENDENTLY LIMITATIONS OF IP

5 UNIQUE ID FOR EACH DEVICE NAT PATH OPTIMIZATION CAN LEAP FIREWALLS 5

6 INFORMATION BANDWIDTH RESOURCES

7 INTER-OPERABILITY - powers of Napster, Gnutella & AIM integrated UBIQUITY PLATFORM INDEPENDENCE SECURITY 7

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9 PLATFORM MINIMAL & ESSENTIAL PRIMITIVES Peer & Peer group discovery Communication Monitoring Security SERVICES N/W & WEB SERVICES Indexing & Searching Distributed File System APPLICATIONS Instant messaging Content Management P2P Service 9

10 PEERS Virtual Mailboxes PEER GROUPS To create a secure, scoping & monitoring environment. MESSAGES XML Datagram Envelope having header, digest, source & destination endpoints PIPES Virtual communication channels Unidirectional, Synchronous request response, Bulk Transfer, Secure 10

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12 OPTIMISED ROUTING MECHANISM MAINTAINS RENDEZVOUS PEER VIEW (RPV) SHARED RESOURCES DISTRIBUTED INDEX (SRDI) DISTRIBUTED HASH TABLE (DHT) RANDOM WALK 12

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14 LAN-BASED DISCOVERY. DISCOVERY THROUGH INVITATION. CASCADED DISCOVERY. DISCOVERY VIA RENDEZVOUS POINTS. 14

15 SET OF SIX PROTOCOLS PEER MEMBERSHIP PROTOCOL PEER INFORMATION PROTOCOL PEER BINDING PROTOCOL PEER DISCOVERY PROTOCOL PEER RESOLVER PROTOCOL PEER ENDPOINT PROTOCOL 15

16 Peer Membership Protocol PeerGroup Peer Resolver Endpoint Peer Membership Protocol PeerGroup Peer Information Protocol Peer Information Protocol Peer Binding Protocol Peer Binding Protocol Peer Discovery Protocol Peer Discovery Protocol Peer Resolver Protocol Peer Endpoint Protocol Peer Resolver Endpoint Transport Peer Resolver Protocol Peer Endpoint Protocol Transport 16

17 Joining and leaving peer groups Actions: Apply Join Renew Cancel Authenticators and security credentials to provide desired level of protection 17

18 Learn about the CAPABILITIES and STATUS of other peers i.e. uptime, offtime, traffic etc QUERY FOR ID PEER INFO MESSAGES 18

19 Bind a pipe advertisement to a pipe endpoint Abstract operations i.e. create, open, close, delete, send, receive. JXTA HTTP, JXTA TCP etc. 19

20 Enables peers to discover peer resources Peers, peer groups, pipes, services, etc Default discovery protocol Based on web-crawling and rendezvous peers Rendezvous peers Cache advertisements Forward requests Discovery Request messages Unicast Propagate 20

21 Enables a peer to send a generic query to another peer service Each service can register a handle in peer group resolver Unique service handler name A peer is not required to respond to a Resolver Query request 21

22 Routing Information Auto update as N/W topology changes Router peers Cache route information Bridge different logical and physical networks 22

23 Crypto Library Hashing functions (MD5) Symmetric encryption (RC4) Asymmetric encryption (DH and RSA) Pluggable Authentication Module (PAM) Password based login scheme Transport security mechanism : Credentials Simple access-control mechanism NAT/Firewalls active research 23

24 Application built on top of Jxta Platform Networked command-line interface Shell commands (similar to Unix) Man Env Whoami Peers Importfile Mkpipe Pipe operators: and < > 24

25 SPEED OPERATING SYSTEM INDEPENDENT TRAVERSE FIREWALLS UNIQUE IDENTIFIER FOR EACH PEER PATH OPTIMISATION DECENTRALIZATON Resource availability Reliability VERSATILE PROTOCOLS No particular PL,OS,N/W topology, encryption or security model Easy to implement and integrate Independent of transport protocols 25

26 Project Jxta homepage Protocol Specification and whitepapers Jxta Shell homepage CMS homepage InstantP2P homepage http//instantp2p.jxta.org 26

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