Turning the net into a single data cloud

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Presentation transcript:

Turning the net into a single data cloud swift Turning the net into a single data cloud Jari Ahola VTT Technical Research Centre of Finland J 7th Networked Media Systems Concertation Meeting, FMN Cluster, April 14th, 2011,Trento, Italy

Background Current internet protocols were designed for 1:1 client-server communication Internet is increasingly a video network TCP is a complex protocol (60k lines of code) BitTorrent is even more complex (90k lines of code) running at application level

swift – the multiparty transport protocol swift’s mission is to disseminate content among a swarm of peers. swift expands the TCP/IP protocol suite with swarming. Designed to be capable of integration into browsers or operating systems and is able to serve 95% of current Internet traffic. It might be understood as BitTorrent at the transport layer.

swift - design Entirely drops TCP's abstraction of sequential reliable data stream delivery: for swift this is redundant. Being implemented over UDP, the protocol does its best to make every datagram self-contained. Pruning of unneeded functions and aggressive layer collapsing greatly simplifies the protocol. The protocol was built around the abstraction of atomic datagrams: once received, a datagram is either immediately discarded or permanently accepted, ready to be forwarded to other peers. To avoid a multilayered request/acknowledgement system, where every layer basically does the same but for bigger chunks of data, swift employs a scale- independent acknowledgement/request system, where data is measured by aligned power-of-2 intervals (so called bins). swift builds Merkle hash trees down to every single packet (1KB of data).

LEDBAT – congestion control swift yields to TCP

swift – Wikipedia integration Distribution of Wikipedia video content

swift – Wikipedia integration Browser integration

swift – available now 4,000 lines of cross-platform C++ code The libswift library is licensed under LGPL; it runs on Mac OS X, Windows and a variety of Unices https://datatracker.ietf.org/doc/draft-grishchenko-ppsp-swift/ http://www.libswift.org/ Created by the P2P-Next project under grant 216217 in FP7