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Contents• Introduction• The Need Peer to Peer• Why JXTA• Walk Through JXTA• Conclusion• References
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Introduction• JXTA stands for “juxtapose” that
means putting things aside of each other. Simply, Peer-to-Peer
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History• JXTA started as JXTA SEARCH in June
2000 when Gene Kan and Yaroslav Faybishenko of Infrasearch created a demo search engine which connected multiple Web servers together using a peer-to-peer (P2P) protocol.
• Nearly a year later, the Infrasearch team is now part of Sun’s Project JXTA. The Sun’s Project can be found on the site http://www.jxta.org
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Peer-to-Peer (P2P)• The Internet has three valuable fundamental
assets • Information which are documents, audios,
videos …etc.• Network capabilities ,“Bandwidth”.• Computing resources, such as processing,
storage The Utilization Ratio for these assets is low !
Because of low end-user contributions
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The Effect of the Traditional Client-Server
Computing Model• world produces about 2x1018 bytes
of information every year, but only publishes about 3x1012 bytes. Moreover, Google claims that it searches about only 3.8x1010 web pages
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Continue• Many new fiber have been installed,
the new installed bandwidth gets little use since everyone goes to same pages such as Amazon for books or to eBay for auctions. What happen is,
“ hot spots just get hotter while cold pipes remain cold”
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JXTA Objective• Interoperability(peer groups, variety of services
supported)• Platform Independence(Programming Language, OS, Network
technology• Ubiquity(all digital devices, even not invented
yet devices)
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JXTA Core Building Blocks
• Peers • peer groups• Advertisements• Messages• Pipes • Services
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Peer Group A
Peer Group B
NetPeerGroup
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Advertisement• <?xml version="1.0"?>• <!DOCTYPE jxta:PipeAdvertisement>• <jxta:PipeAdvertisement xmlns:jxta="http://www.jxta.org">• <Id>• urn:jxta:uuid-59616261646162614E50472050325033A10C• F46E7B7041B48C3EBF32A5DA2A4404• </Id>• <Type>• JxtaUnicast• </Type>• <Name>• frodo.replyTo• </Name>• </jxta:PipeAdvertisement>
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JXTA Protocols• Endpoint Routing Protocol (ERP) • The Peer Resolver Protocol • The Rendezvous Protocol • The Peer Discovery protocol (PDP) • The Peer Information Protocol (RIP) • The Pipe Binding Protocol
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Rendezvous Peer View • Rendezvous super peers maintains its own rendezvous
peer view which is an ordered list of other known rendezvous in the peer group by their peer ID’s.
• Rendezvous periodically select a given random number of rendezvous from their local RVP, and send them a random list of their known rendezvous.
• Rendezvous check their neighbor rendezvous (+1 or more, -1 or less).
• Rendezvous update and clean non-responding rendezvous from their RPV.
• Rendezvous might retrieve rendezvous info from a predetermined set of bootstrapping seeding rendezvous.
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Edge peer Rendezvous connection
• Check its cache for Rdv advertisement.
• If No responsetry to propagate request through
possible connections • If No response Try seed Rendezvous• If No response Be a Rendezvous
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P1
H(adv)1
R1
R6
R5
R4
R3
R2Adv1
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P1
H(adv)1
R1R5
R5
R4
R3
R2
Adv1
P2
R6
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P1
H(adv)1
R1
R6
R5
R4
R3
R2
Adv1
P2
R7R8
UP
UP
down
down
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Conclusion• JXTA considered one of the biggest
project in P2P.• A project that unite all works of
Peer to Peer• JXTA Open Source License attracts
a lot of developers and companies.
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References• http://www.jxta.org• http://www.aim.com• Steve Waterhouse, “JXTA Search: Distributed Search for Distributed Networks”, Sun Microsystems,
Inc., 2001.• Li Gong, ”Project JXTA: A Technology Overview”, Sun Microsystems, Inc., 2002• http://www.google.com• JXTATM Technology: Creating Connected Communities, Sun Microsystems, 2004• Sing Li, “Making P2P interoperable: The JXTA story”,2001 • Bernard Traversat, Ahkil Arora, Mohamed Abdelziz, Mike Duigou, Carl Haywood, “Project JXTA 2.0
Super-Peer Virtual Network”, Sun Microsystems, 2003• Daniel Brookshier, Darren Govoni, Navaneeth Krishnan, Juan Carlos Soto “JXTA: Java P2P
Programming”, SAMS, 1st edition,2002• Ion Stocia, Robert Morris, David Liben-Nowell, “Chord: A Scalable Peer-to-Peer Lookup Protocol for
Internet Applications”, ACM Transactions on Networking, Vol 11, No.1, 2003• Q.Lv and al., Search and Replication in Unstructured Peer-to-Peer Network,
www.cs.princeton.edu/~qlv/download/searchp2p_full.pdf• “Project JXTA: An Open, Innovative Collaboration”, Sun Microsystems.• Rita Yu Chen,Bill Yeager,”Java mobile agents on project JXTA peer-to-peer Platform”, Proceedings
of the 36th Hawaii International Conference on System Sciences(HICSS’03), IEEE, 2002
