Torrents and P2P Algorithm

We are in the era of P2P and torrents. We all talk about it and it is almost impossible for someone who uses the Internet had not used such a program. The story is fairly recent. Napster began with the classic, where everybody is connected to a central server that was used for searches. The trials were failure and the service had to close but the idea was captured by many other sources. There are many programs nowadays such as Morpheus, KaZaA and Grokster for p2p services (point2point or peer2peer).

All these systems have one thing in common: the searches are performed in a server. The success of some of these systems also makes more files in the queue every day for downloading because each system is at limited speed of the connections and users.

What are trackers?
Trackers are responsible for handling connections between users and keep track of how much of each file is downloading and sharing. Anyone can install a tracker on your computer while you have a connection that allows you to be online most of the time.

How tracker works?
Each user that connects to the tracker is called a peer, and can send and receive parts of the file. Others who have the complete file are called share seeds and their goal is to send the file on request. These portions are joined by the Torrent. Torrents are small files and they upload each seed which generates the selected tracker. These include: the name of the file to download (with which we can download multiple files through a single torrent), the address of the tracker (to know where to connect) and the hash (which is necessary to ensure the accuracy of the downloaded file).

The basic way to find files is through torrent sites and also there many software for the same purpose. Many site owners have also created small programs that seek on these pages, and save us the task of tracking down one by one.

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