That's only a small fraction of the bandwidth you use in the downlink. With HTTP, all the uplink is used for basically, is sending TCP ACKs to the server. Your client also hands out data so you use your uplink at lot (as much as you allow it basically). With bittorrent you're getting each individual part limited by the uplink speed of that user who has that part. Your client also hands out data to other users over your Internet connection. A bittorrent transfer to you is very likely to reach you over other users' uplinks. Uplinkĭue to the nature of these protocols. While clients (probably) could ask for chunks in a chronological order and then get the data in a sequential manner that is not how clients typically work, and it would greaty defeat some of the primary purposes of bittorrent as it will not at all distribute the load as evenly among the peers as the "random access" method does. Things that must be sent and received in a specific order, such as a live audio or video stream, is problematic to distribute via bittorrent given the current design. Bittorrent downloads tend to start slow, and increase in speed during the transfer and slow down again towards the end when it only gets a few remaining pieces to get.
BITTORRENT LIVE DOWNLOAD DOWNLOAD
A client will also soon start to hand out parts of the file that it has already downloaded, to other peers that want to download that same file. Some network operators do funny things, so a client can actually get higher transfer performance by connecting multiple times and transferring parts of the data in several simultaneous connections.īittorrent on the other hand requests "random" parts of the file from N number of peers and it can typically download several parts at once from different sources. A typical such transfer is limited by the narrowest network condition along the way, or by the server being overloaded by requests from many clients. After the initial "request", HTTP reaches max speed pretty quickly.
The transfer is then typically done the fastest way the remote server, the network and the client manage. With HTTP a file is presented in a single stream by the HTTP server. Basic Factsīittorrent is a way for a client to figure out what peers that have a piece of a particular file so that it can get pieces from those machines instead of getting the entire thing from a single (central) place. Here's a comparison between the use of bittorrent vs HTTP for data transfers.
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