Feeds

Chinese boffins ginger up Hadoop with OpenFlow funnel

Software-defined networking speeds scheduling across clusters

HP ProLiant Gen8: Integrated lifecycle automation

Few doubt that the premise of software-defined-networking (SDN) is a good one: organisations that run a lot of virtual machines and virtual networks can benefit from the flexibility and automation SDN provides.

Critics, however, point out that SDN in its current form might not have particularly broad applicability: there just aren't that many data centres with the traffic problems SDN solves.

Enter an interesting paper from Chinese scholars titled “Bandwidth-Aware Scheduling with SDN in Hadoop: A New Trend for Big Data”, that proposes SDN as a solution to a big data problem.

The authors, from Wuhan's Huazhong University of Science and Technology, note that Hadoop has several task schedulers but none of them take into account available bandwidth. That lack, they argue, means “losing optimized opportunities for task assignment.”

With Hadoop's parallelism one of its key advantages, missing the chance to slot in a job is obviously not a great outcome. The scholars therefore ask the question: “Can we combine the bandwidth control capability of SDN with Hadoop system to exploit an optimized task scheduling solution that has high efficiency and agility in terms of job completion time for big data processing?”

Unsurprisingly, their answer is yes, thanks to a new task scheduler they propose called “Bandwidth-Aware Scheduling with SDN in Hadoop”, aka “BASS”.

BASS' approach is to interface with an OpenFlow controller to learn as much as it can about the available bandwidth in a Hadoop cluster and its attendant networking rig. Once BASS has gathered that data, it allocates tasks based on how speedily the network can carry it to an Hadoop node.

The authors offer test results suggesting BASS is rather faster than other job schedulers and even suggest an improvement called “Pre-BASS” that adds some extra pre-processing grooming so queues can be made even more efficient.

The paper details tests made on a six-node Hadoop cluster spread across give physical hosts. That is, of course, a long way short of the scale at which many Hadoop clusters operate, but the authors are optimistic they can scale BASS in the future. ®

Reducing security risks from open source software

More from The Register

next story
Sysadmin Day 2014: Quick, there's still time to get the beers in
He walked over the broken glass, killed the thugs... and er... reconnected the cables*
SHOCK and AWS: The fall of Amazon's deflationary cloud
Just as Jeff Bezos did to books and CDs, Amazon's rivals are now doing to it
Amazon Reveals One Weird Trick: A Loss On Almost $20bn In Sales
Investors really hate it: Share price plunge as growth SLOWS in key AWS division
US judge: YES, cops or feds so can slurp an ENTIRE Gmail account
Crooks don't have folders labelled 'drug records', opines NY beak
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
BlackBerry: Toss the server, mate... BES is in the CLOUD now
BlackBerry Enterprise Services takes aim at SMEs - but there's a catch
The triumph of VVOL: Everyone's jumping into bed with VMware
'Bandwagon'? Yes, we're on it and so what, say big dogs
Carbon tax repeal won't see data centre operators cut prices
Rackspace says electricity isn't a major cost, Equinix promises 'no levy'
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.