Feeds

Boffins strap turbocharger to BitTorrent

P2P that goes FASTER as load increases

Choosing a cloud hosting partner with confidence

Cue a new round of fast-network scare-mongering from the world's content owners: a group of information theorists from the US, France and Finland believe that with a bit of tweaking, P2P networks can become even more efficient.

In fact, if their maths is correct – and their ideas could be deployed on a large scale – their counter-intuitive conclusion is that P2P networks would deliver the counter-intuitive outcome of performing better as the load on the network grows.

One of the key assumptions underlying P2P networks like BitTorrent is that users have relatively limited upload available to them. This is likely to become obsolete, the researchers argue in Can P2P networks be super-scalable?, available on arXiv.

As a result, they believe, it's time to consider new P2P models that ignore upstream capacity as a constraint, and consider what else might hamper P2P overlays in the high-speed broadband world.

Their argument is that P2P protocols like BitTorrent assume (quite reasonably) that the key performance bottleneck is the nodes themselves – how quickly their processing power and upstream links allow them to serve chunks to their peers.

What the paper suggests is that if upload capacity is no longer a constraint, the next bottleneck to emerge is topological – the logical distance between peers. However, that also becomes a strength, the paper argues, since if it's built into the operation of the P2P protocol, the P2P overlay becomes “super-scalable”: performance gets better as load increases (up to the underlying network capacity).

“There are some earlier papers considering P2P systems in a spatial framework … but they do not assume that distance has some effect on transfer speed. Our paper seems to be the first where a peer's downloading rate is a function of its distances to other peers,” the paper states.

If, the main resource bottleneck is considered as the logical links between nodes rather than the nodes themselves, and if all peers are visible to each other (the mesh is complete, or in the authors' terminology, “the interaction graph is complete at any time”), then “the service time is inversely proportional to the square root of the arrival intensity: this is super-scalability”.

“The central reason for super-scalability is rather obvious: the number of edges in a complete graph is of the order of the square of the number of nodes, and so is the overall service capacity”, they write.

The paper was authored by Francois Baccelli (UT Austin), Fabien Matheiu and Rémi Varloot of the University of Paris, and Ikka Norros of the VTT Technical Research Centre in Finland. ®

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
Download alert: Nearly ALL top 100 Android, iOS paid apps hacked
Attack of the Clones? Yeah, but much, much scarier – report
Broadband sellers in the UK are UP TO no good, says Which?
Speedy network claims only apply to 10% of customers
Virgin Media struck dumb by NATIONWIDE packet loss balls-up
Turning it off and on again fixes glitch 12 HOURS LATER
Fujitsu CTO: We'll be 3D-printing tech execs in 15 years
Fleshy techie disses network neutrality, helmet-less motorcyclists
Facebook, working on Facebook at Work, works on Facebook. At Work
You don't want your cat or drunk pics at the office
Soz, web devs: Google snatches its Wallet off the table
Killing off web service in 3 months... but app-happy bonkers are fine
Ofcom tackles complaint over Premier League footie TV rights
Virgin Media: UK fans pay the most for the fewest matches
Yahoo! blames! MONSTER! email! OUTAGE! on! CUT! CABLE! bungle!
Weekend woe for BT as telco struggles to restore service
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Internet Security Threat Report 2014
An overview and analysis of the year in global threat activity: identify, analyze, and provide commentary on emerging trends in the dynamic threat landscape.
Top 5 reasons to deploy VMware with Tegile
Data demand and the rise of virtualization is challenging IT teams to deliver storage performance, scalability and capacity that can keep up, while maximizing efficiency.