Feeds

Chinese boffins ginger up Hadoop with OpenFlow funnel

Software-defined networking speeds scheduling across clusters

Secure remote control for conventional and virtual desktops

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. ®

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
Azure TITSUP caused by INFINITE LOOP
Fat fingered geo-block kept Aussies in the dark
NASA launches new climate model at SC14
75 days of supercomputing later ...
Yahoo! blames! MONSTER! email! OUTAGE! on! CUT! CABLE! bungle!
Weekend woe for BT as telco struggles to restore service
You think the CLOUD's insecure? It's BETTER than UK.GOV's DATA CENTRES
We don't even know where some of them ARE – Maude
BOFH: WHERE did this 'fax-enabled' printer UPGRADE come from?
Don't worry about that cable, it's part of the config
Want to STUFF Facebook with blatant ADVERTISING? Fine! But you must PAY
Pony up or push off, Zuck tells social marketeers
Oi, Europe! Tell US feds to GTFO of our servers, say Microsoft and pals
By writing a really angry letter about how it's harming our cloud business, ta
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Getting started with customer-focused identity management
Learn why identity is a fundamental requirement to digital growth, and how without it there is no way to identify and engage customers in a meaningful way.
5 critical considerations for enterprise cloud backup
Key considerations when evaluating cloud backup solutions to ensure adequate protection security and availability of enterprise data.
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.
Managing SSL certificates with ease
The lack of operational efficiencies and compliance pitfalls associated with poor SSL certificate management, and how the right SSL certificate management tool can help.