Welcome!

SDN Journal Authors: Destiny Bertucci, Jignesh Solanki, Liz McMillan, Elizabeth White, Daniel Gordon

News Feed Item

Fujitsu Develops Cluster-Based Distributed Controller Technology to Implement Failure-Tolerant Wide-Area Software-Defined Networking

Enables uninterrupted operations of large-scale networks

Kawasaki, Japan, June 5, 2014 - (JCN Newswire) - Fujitsu Laboratories Ltd. today announced that it has developed technology for cluster-based distributed controllers in large-scale networks that implements a wide-area software-defined networking (SDN) and that can automatically handle controller failures and load fluctuations.

A cluster-based distributed controller runs on multiple physical controllers as a single logical controller to control multiple network switches. Compared to conventional centralized controllers, cluster-based distributed controllers offer better scalability and improved failure tolerance. Until now, however, the problem was that they had difficulty handling sudden load fluctuations and coordinated control when there was a controller failure.

Now, Fujitsu Laboratories has developed a distributed controller module for the coordinated control of multiple controllers, a load-balancing technology that transfers a switch being managed by one controller to another in a matter of seconds when a controller is under increasing load or has a failure, and an uninterrupted recovery technology. These technologies enable SDNs to work reliably when traffic rises beyond initially expected levels, or when multiple controllers have failures.

By deploying an SDN with these technologies to a wide-area network, infrastructure can recover quickly from disasters or other network failures while maintaining steady network operations.

These technologies are being presented at Interop Tokyo 2014, opening June 11 at Makuhari Messe in Chiba, Japan.

Background

Existing SDNs such as OpenFlow(1) are designed for centralized control, which means that operating wide-area networks, configured with switches transferring large volumes of communication packets, as SDNs results in highly concentrated loads in the controller when the number of users increases. This will be an obstacle to the smooth provision of service, and if the controller itself fails, the switch that it had been managing can no longer be controlled.
Fujitsu Laboratories solved these problems by treating multiple physical controllers as a single logical controller that can handle centralized control of thousands of switches. This is accomplished through a proprietary cluster-based distributed controller technology.

This technology consists of a module for control applications that is an add-on to existing controller applications, and a distributed controller module that connects multiple distributed controllers as components of an OpenFlow controller so that, depending on loads, application and controller components can be added along with server resources.

Issues

Cluster-based distributed controllers are different from centralized controllers in that multiple distributed controller modules need to be run in a coordinated way so that they do not compete with each other. Another challenge is ensuring continuity of control. Processes need to keep running even if a module fails, but difficulties are encountered with automatic switchovers when some controller components are heavily loaded or fail, and processing by the switches managing the controllers slows down or control becomes unsustainable.

About the Technology

Fujitsu Laboratories has developed a load-balancing technology that automatically redistributes control loads in a cluster-based distributed controller, and a recovery technology that automatically reassigns controllers without interruption when one fails.

Load-Balancing Technology Fujitsu Laboratories has developed a load-checking function as a new addition to the distributed-controller coordination module. This collects load information from each controller component (such as CPU utilization rate and number of switches) (step 1), and the coordination system periodically checks load information using one distributed-controller coordination module chosen as the "leader" based on module control number or other criterion (step 2) to detect load imbalances. If load rebalancing is judged to be needed according to the load-balancing logic, which switches to be reassigned are decided based on switch-reassignment logic, to balance the load according to a policy for CPU utilization rates and number of switches (step 3). As a result, the correspondence between the changed switches and the controllers is registered in the coordination system (step 4), and the load is balanced by reassigning the switches in accordance with the updated information from the distributed-controller (step 5).

Uninterrupted Recovery Technology Fujitsu Laboratories has developed a new failure-checking function for the distributed-controller coordination module. The distributed-controller coordination module chosen as leader detects a failure in a controller component (steps 1, 2) and determines a new controller component to manage the switches connected to the failed controller (step 3). This changes the controller/switch correspondence information to redistribute loads automatically based on controller-component load information (CPU utilization rates and number of switches) (step 4). The distributed-controller coordination modules that have not failed link to the information update and activate it to reassign the controllers managing switches (step 5) so that operations continue without any interruption in service. Because the controllers that are the reassignment destinations are decided using load-balancing technology, no controller should experience a sudden load spike that would cause it to shut down.

Furthermore, even if the leader module itself suffers from a failure, the coordination system will detect a session interruption and select a new leader, and that leader module will determine controllers to manage switches again.

Results

Using the cluster-based distributed controller makes it possible to handle sudden load fluctuations and to maintain continuity of network services even when controllers fail, enabling stable, highly reliable operations of wide-area networks.

For example, in the case of conventional controllers, when they are duplicated in the hot standby mode, i.e. active and on standby, for a ten-domain network, the total required number of the controllers is 20, or specifically two per domain. By contrast, using cluster-based distributed controllers, just one standby controller is added to the regularly running ten controllers, so that only 11 controllers are needed, enabling a reduction in the number of controllers by nearly half.

Future Plans

This technology could be used in the networks of telecommunications carriers and other network infrastructure to achieve highly reliable, stable operations with lower deployment costs and lower operating costs.

Fujitsu Laboratories is continuing with research and development on control technology for cluster-based distributed controllers with the goal of a practical implementation in fiscal 2015.

Note:

(1) OpenFlow

A centralized control technology that isolates the control unit for routers and switches from data transfer.

About Fujitsu Limited

Fujitsu is the leading Japanese information and communication technology (ICT) company offering a full range of technology products, solutions and services. Approximately 170,000 Fujitsu people support customers in more than 100 countries. We use our experience and the power of ICT to shape the future of society with our customers. Fujitsu Limited (TSE: 6702) reported consolidated revenues of 4.4 trillion yen (US$47 billion) for the fiscal year ended March 31, 2013 For more information, please see www.fujitsu.com.



Source: Fujitsu Limited

Contact:
Fujitsu Limited
Public and Investor Relations
www.fujitsu.com/global/news/contacts/
+81-3-3215-5259


Copyright 2014 JCN Newswire. All rights reserved. www.japancorp.net

More Stories By JCN Newswire

Copyright 2008 JCN Newswire. All rights reserved. Republication or redistribution of JCN Newswire content is expressly prohibited without the prior written consent of JCN Newswire. JCN Newswire shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon.

@CloudExpo Stories
Leading companies, from the Global Fortune 500 to the smallest companies, are adopting hybrid cloud as the path to business advantage. Hybrid cloud depends on cloud services and on-premises infrastructure working in unison. Successful implementations require new levels of data mobility, enabled by an automated and seamless flow across on-premises and cloud resources. In his general session at 21st Cloud Expo, Greg Tevis, an IBM Storage Software Technical Strategist and Customer Solution Architec...
The cloud era has reached the stage where it is no longer a question of whether a company should migrate, but when. Enterprises have embraced the outsourcing of where their various applications are stored and who manages them, saving significant investment along the way. Plus, the cloud has become a defining competitive edge. Companies that fail to successfully adapt risk failure. The media, of course, continues to extol the virtues of the cloud, including how easy it is to get there. Migrating...
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life settle...
The use of containers by developers -- and now increasingly IT operators -- has grown from infatuation to deep and abiding love. But as with any long-term affair, the honeymoon soon leads to needing to live well together ... and maybe even getting some relationship help along the way. And so it goes with container orchestration and automation solutions, which are rapidly emerging as the means to maintain the bliss between rapid container adoption and broad container use among multiple cloud host...
Blockchain is a shared, secure record of exchange that establishes trust, accountability and transparency across business networks. Supported by the Linux Foundation's open source, open-standards based Hyperledger Project, Blockchain has the potential to improve regulatory compliance, reduce cost as well as advance trade. Are you curious about how Blockchain is built for business? In her session at 21st Cloud Expo, René Bostic, Technical VP of the IBM Cloud Unit in North America, discussed the b...
Blockchain. A day doesn’t seem to go by without seeing articles and discussions about the technology. According to PwC executive Seamus Cushley, approximately $1.4B has been invested in blockchain just last year. In Gartner’s recent hype cycle for emerging technologies, blockchain is approaching the peak. It is considered by Gartner as one of the ‘Key platform-enabling technologies to track.’ While there is a lot of ‘hype vs reality’ discussions going on, there is no arguing that blockchain is b...
Imagine if you will, a retail floor so densely packed with sensors that they can pick up the movements of insects scurrying across a store aisle. Or a component of a piece of factory equipment so well-instrumented that its digital twin provides resolution down to the micrometer.
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
As DevOps methodologies expand their reach across the enterprise, organizations face the daunting challenge of adapting related cloud strategies to ensure optimal alignment, from managing complexity to ensuring proper governance. How can culture, automation, legacy apps and even budget be reexamined to enable this ongoing shift within the modern software factory? In her Day 2 Keynote at @DevOpsSummit at 21st Cloud Expo, Aruna Ravichandran, VP, DevOps Solutions Marketing, CA Technologies, was jo...
While some developers care passionately about how data centers and clouds are architected, for most, it is only the end result that matters. To the majority of companies, technology exists to solve a business problem, and only delivers value when it is solving that problem. 2017 brings the mainstream adoption of containers for production workloads. In his session at 21st Cloud Expo, Ben McCormack, VP of Operations at Evernote, discussed how data centers of the future will be managed, how the p...
"Since we launched LinuxONE we learned a lot from our customers. More than anything what they responded to were some very unique security capabilities that we have," explained Mark Figley, Director of LinuxONE Offerings at IBM, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
When shopping for a new data processing platform for IoT solutions, many development teams want to be able to test-drive options before making a choice. Yet when evaluating an IoT solution, it’s simply not feasible to do so at scale with physical devices. Building a sensor simulator is the next best choice; however, generating a realistic simulation at very high TPS with ease of configurability is a formidable challenge. When dealing with multiple application or transport protocols, you would be...
Nordstrom is transforming the way that they do business and the cloud is the key to enabling speed and hyper personalized customer experiences. In his session at 21st Cloud Expo, Ken Schow, VP of Engineering at Nordstrom, discussed some of the key learnings and common pitfalls of large enterprises moving to the cloud. This includes strategies around choosing a cloud provider(s), architecture, and lessons learned. In addition, he covered some of the best practices for structured team migration an...
In his session at 21st Cloud Expo, Raju Shreewastava, founder of Big Data Trunk, provided a fun and simple way to introduce Machine Leaning to anyone and everyone. He solved a machine learning problem and demonstrated an easy way to be able to do machine learning without even coding. Raju Shreewastava is the founder of Big Data Trunk (www.BigDataTrunk.com), a Big Data Training and consulting firm with offices in the United States. He previously led the data warehouse/business intelligence and B...
Smart cities have the potential to change our lives at so many levels for citizens: less pollution, reduced parking obstacles, better health, education and more energy savings. Real-time data streaming and the Internet of Things (IoT) possess the power to turn this vision into a reality. However, most organizations today are building their data infrastructure to focus solely on addressing immediate business needs vs. a platform capable of quickly adapting emerging technologies to address future ...
In his general session at 21st Cloud Expo, Greg Dumas, Calligo’s Vice President and G.M. of US operations, discussed the new Global Data Protection Regulation and how Calligo can help business stay compliant in digitally globalized world. Greg Dumas is Calligo's Vice President and G.M. of US operations. Calligo is an established service provider that provides an innovative platform for trusted cloud solutions. Calligo’s customers are typically most concerned about GDPR compliance, application p...
You know you need the cloud, but you’re hesitant to simply dump everything at Amazon since you know that not all workloads are suitable for cloud. You know that you want the kind of ease of use and scalability that you get with public cloud, but your applications are architected in a way that makes the public cloud a non-starter. You’re looking at private cloud solutions based on hyperconverged infrastructure, but you’re concerned with the limits inherent in those technologies.
Is advanced scheduling in Kubernetes achievable?Yes, however, how do you properly accommodate every real-life scenario that a Kubernetes user might encounter? How do you leverage advanced scheduling techniques to shape and describe each scenario in easy-to-use rules and configurations? In his session at @DevOpsSummit at 21st Cloud Expo, Oleg Chunikhin, CTO at Kublr, answered these questions and demonstrated techniques for implementing advanced scheduling. For example, using spot instances and co...
DevOps is under attack because developers don’t want to mess with infrastructure. They will happily own their code into production, but want to use platforms instead of raw automation. That’s changing the landscape that we understand as DevOps with both architecture concepts (CloudNative) and process redefinition (SRE). Rob Hirschfeld’s recent work in Kubernetes operations has led to the conclusion that containers and related platforms have changed the way we should be thinking about DevOps and...
The need for greater agility and scalability necessitated the digital transformation in the form of following equation: monolithic to microservices to serverless architecture (FaaS). To keep up with the cut-throat competition, the organisations need to update their technology stack to make software development their differentiating factor. Thus microservices architecture emerged as a potential method to provide development teams with greater flexibility and other advantages, such as the abili...