p2p Computing Presentation ppt

8/2/2019 p2p Computing Presentation ppt

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What is P2P ?

Peer is a entity that has attributes similar to other entities in system

P2P is a technologyand not a protocol

Process whereby computers trade information between each other withouthaving to pass the information through a centrally controlled server

Sharingof computer resources (information, processing) and services bydirect exchangebetween systems


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What is P2P ?

Computer Systems

Centralized SystemsE.g.. Mainframes

Distributed Systems

Client Server Peer to peer

Flat Hierarchical Pure Hybrid


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Definition

The term peer-to-peer computing refers touse a class of systems and applications thatemploy distributed resources to perform afunction in a decentralized manner to

compute


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Models

Multiple Peer Relationship

PCs are connected/networked to each otherthrough servers, and files can be shared andcollected from anyone else on that samenetwork.


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ModelsDistributed Peer Relationship

A group of computers connected together to combinetheir computing and processing abilities to searchthe Internet or solve very complex problemsrequiring massive process crunching


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ModelsCollaborative Peer Relationship

A small group of people agree to collaborate througha common interface, such as on-line gaming, chatrooms, instant messaging, or e-learning environment


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The Common Object Request BrokerArchitecture (CORBA) is a standard defined bythe Object Management Group (OMG) thatenables software components written in

multiple computer languages and running onmultiple computers to work together (i.e., itsupports multiple platforms).

The .NET Framework (pronounced dot net) isa software framework that runs primarilyon Microsoft Windows. It includes alarge library and provides language interoperability(each language can use code written in otherlanguages) across several programming languages.


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Goals

Cost sharing/reduction

Improved scalability/reliability

Resource aggregation and interoperabilityIncreased autonomy

Anonymity/privacy

DynamismEnabling ad-hoc communication andcollaboration


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Terminology

Centralized systems Single-unit solutions

Distributed Systems

Client

Server


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Terminology

Client-Server model

Peer

P2P modelDistributed computing Computing cluster, grids, global computing

systems

Grid computingAd-hoc communication


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P2P TaxonomiesComputer Systems Centralized Systems

Distributed Systems

Client-Server Flat

Hierarchical

Peer-to-Peer

Pure: Gnutella Hybrid: Napster


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Communication &Collaboration

Platforms JXTA, .NET

Collaboration

Groove, Jabber

Computing

SETI@HOME, Avaki

File sharing

Napster, Gnutella


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P2P applications


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Infrastructure Components


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Class-Specific Scheduling

Meta-data

Messaging

Management

Application-Specific


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CHARACTERISTICS

Decentralization

Scalability

Anonymity

Self-organization

Cost of ownership

Ad-hoc connectivity

Performance

Security

Transparency Usability

Fault resilience

interoperability


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Decentralization


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Anonymity


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Avaki


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SETI@homescientific experiment that usesInternet-connected computers

in the Search for ExtraterrestrialIntelligence


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Groove


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Magi


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JXTA An open source peer-to-peer protocolspecification begun by Sun Microsystemsin 2001


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Summary


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St th d W k


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Strengths and Weaknesses

Documents

p2p Computing Presentation ppt