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tip: about torrents

All About Torrents!!!

What is BitTorrent?
BitTorrent is a protocol designed for transferring files.

It is peer-to-peer (p2p) in nature, as users connect to each other directly to send and receive portions of the file. However, there is a central server (called a tracker) which coordinates the action of all such peers. The tracker only manages connections, it does not have any knowledge of the contents of the files being distributed, and therefore a large number of users can be supported with relatively limited tracker bandwidth.

The key philosophy of BitTorrent is that users should upload (transmit outbound, also called seeding) at the same time they are downloading (receiving inbound, also called leeching). In this manner, network bandwidth is utilized as efficiently as possible. BitTorrent is designed to work better as the number of people interested in a certain file increases, in contrast to other file transfer protocols

BitTorrent Quick Start
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GET A CLIENT In order to use BitTorrent you need to download a Bittorrent client This will allow you to grab the files described in the .torrent. There are many clients currently available that can be downloaded for free of the web. Here is some of them:

Original Bittorrent
Shadow Experimental

CONFIGURE Once you have downloaded one of the above eventually check the configuration options in order to tune it to your bandwidth (some clients like Azureus have a configuration wizard):

1. Your upload speed shouldn't be set to more than 80 to 90% of your maximum upload speed. For example, if you have a max upload of 25Kb/s your BitTorrent upload speed shouldn't be more than 20 to 22Kb/s. Using all of it would cause your download speed to be severely lowered, this because a small upload percentage is needed by BitTorrent to communicate with the tracker and the other peers.

2. Don't be too generous and restrain the maximum number of uploads -- how many simultaneous leeches will benefit from your seed -- to a reasonable number. Let's say you have one active torrent and 20Kb/s of total bandwidth. With 4 max uploads, 4 people will receive 5Kb/s from you, which is nice. But if you have 3 active torrents and allow 8 uploads, 24 sad guys (3 torrents with 8 connections on each) will only get less than 1Kb/s which is poor...

3. When zero means unlimited you shouldn't leave any values anywhere at zero. Indicate high numbers, like 99 or less, according to your tastes. It's just a precaution as some clients experienced memory overload while reaching their unlimited limits. Furthermore, zero seldom means "no connections from peers", ie. no seeding... Don't try that unless you want to be banned from our tracker.

4. Your firewall if you have one, should have ports 6881 to 6889 open. Check the (future) firewall topic for more information.

SEED! you'll see this printed in large and friendly letters all over every BitTorrent sites. It means you should at the very least upload the same amount you downloaded. BitTorrent relies on sharing: if you don't share why do you expect other will?

Now you can click on a .torrent file and start downloading!
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