evolution of peer to peer downloading

8/7/2019 EVOLUTION OF PEER TO PEER DOWNLOADING

1/19

EVOLUTION OF PEER TO PEEREVOLUTION OF PEER TO PEER

DOWNLOADINGDOWNLOADING

PRESENTED BY

NAME REGD NO BRANCH


2/19

PEER TO PEER NETWORKPEER TO PEER NETWORKWhat is a peer to peer network?

A peer to peer network is a network that relies on thecomputing power & bandwidth of the participants on thenetwork.

P2p networks are typically used for connecting nodes vialargely ad_hoc connections.

Such networks are useful for sharing content filescontaining audio,video ,data & anything in digital format.


3/19

File Download / TransferFile Download / Transfer

1. Traditional Client-Server Downloading

2. Peer to peer file sharing


4/19

Traditional ClientTraditional Client--ServerServer

DownloadingDownloadingYouopen a Webpage and click a link todownload a

file to yourcomputer.

The Webbrowsersoftwareon yourcomputer (the

client) tells theserver(a central computer that holds the

Webpage and the file youwant todownload) to

transfera copy of the file to yourcomputer

The transfer is handledby a protocol (a set ofrules),

such as FTP (File TransferProtocol) orHTTP

(HyperText TransferProtocol).


5/19


6/19


7/19

P2P Computing ApplicationsP2P Computing Applications

File sharing

Process and cycle sharing

Collaborative environments

Metadata exchange - Semantic Web


8/19

P2P Process SharingP2P Process Sharing

ApplicationsApplications

For large-scale computations

Data analysis, data mining, scientific

computing

E.g., SETI@Home, Folding@Home,

distributed.net, World-Wide Computer


9/19

P2P CollaborativeP2P Collaborative

ApplicationsApplications

For remote real-time human collaboration.

Instant messaging, virtual meetings, shared

whiteboards, teleconferencing, tele-presence.

E.g., talk, IRC, ICQ, AOL Messenger, Yahoo!

Messenger, Jabber, MS Netmeeting, NCSAHabanero, Games

Groove networks, Mybook Project


10/19

P2P File Sharing ApplicationsP2P File Sharing Applications Improves data availability

Replication to compensate for failures.

E.g., Napster, Gnutella, Freenet, KaZaA

(FastTrack), BitTorrent


11/19

NapsterNapster

The revolution begins


12/19

The Shawn Fanning TheoryThe Shawn Fanning Theory Search engine: Dedicated to finding MP3 files

only

File sharing: The ability to trade MP3 filesdirectly, without having to use a centralized server

for storage

Internet Relay Chat (IRC): A way to find and

chat with other MP3 users while online


13/19

You needed:

A copy of the Napster utility installedon your computer

A directory on your computer that hasbeen shared so that remote users can

access it Some type ofInternetconnection

The provider of the song needed:

A copy of the Napster utility installedon his computer

A directory on his computer that hasbeen shared so that someone else

could access itSome type of Internet connection that

was "on"A copy of the song in the designated,

shared directory


14/19

Gnutella

There are two big differences between Gnutella and the oldNapster:

There is no central database that knows all of the files availableon the Gnutella network. Instead, all of the machines on the networktell each other about available files using a distributed query

approach.

There are

m

any different client applications available to accessthe Gnutella network.


15/19

KazzaKazza

Uses a fast trackprotocol.

Designates computers assupernodes and nodes.

When the computer

sends out a request forfiles the user wants todownload or upload, therequest is funneledthrough the supernode.The supernode

communicates with othersupernodes, which in turnconnect to regular nodesthat in turn connect toeven more regular nodes


16/19

BitTorrentB

itTorrentFast downloading of large files using minimum Internet bandwidthMaximizes transfer speed by gathering pieces of the file you want anddownloading these pieces simultaneously from people who already havethem.

Bit-torrent is an open source software.

Designed using python and GTK+.


17/19

TRACKERTORRENT

SWARM

SEEDER

LEECHER

RESEEDING

DOWNLOADING

UPLOADING

SHARE RATING

DITRIBUTED COPIES

CHOKED


18/19


19/19

QUERIES

QUERIES

evolution of peer to peer downloading

Documents