Welcome!

SDN Journal Authors: Elizabeth White, Liz McMillan, Jim Hansen, Carl J. Levine, Greg Schulz

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
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor - all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
My team embarked on building a data lake for our sales and marketing data to better understand customer journeys. This required building a hybrid data pipeline to connect our cloud CRM with the new Hadoop Data Lake. One challenge is that IT was not in a position to provide support until we proved value and marketing did not have the experience, so we embarked on the journey ourselves within the product marketing team for our line of business within Progress. In his session at @BigDataExpo, Sum...
SYS-CON Events announced today that MobiDev, a client-oriented software development company, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place June 6-8, 2017, at the Javits Center in New York City, NY, and the 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. MobiDev is a software company that develops and delivers turn-key mobile apps, websites, web services, and complex softw...
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm.
Interoute has announced the integration of its Global Cloud Infrastructure platform with Rancher Labs’ container management platform, Rancher. This approach enables enterprises to accelerate their digital transformation and infrastructure investments. Matthew Finnie, Interoute CTO commented “Enterprises developing and building apps in the cloud and those on a path to Digital Transformation need Digital ICT Infrastructure that allows them to build, test and deploy faster than ever before. The int...
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
The cloud competition for database hosts is fierce. How do you evaluate a cloud provider for your database platform? In his session at 18th Cloud Expo, Chris Presley, a Solutions Architect at Pythian, gave users a checklist of considerations when choosing a provider. Chris Presley is a Solutions Architect at Pythian. He loves order – making him a premier Microsoft SQL Server expert. Not only has he programmed and administered SQL Server, but he has also shared his expertise and passion with budd...
Apache Hadoop is emerging as a distributed platform for handling large and fast incoming streams of data. Predictive maintenance, supply chain optimization, and Internet-of-Things analysis are examples where Hadoop provides the scalable storage, processing, and analytics platform to gain meaningful insights from granular data that is typically only valuable from a large-scale, aggregate view. One architecture useful for capturing and analyzing streaming data is the Lambda Architecture, represent...
SYS-CON Events announced today that Ocean9will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Ocean9 provides cloud services for Backup, Disaster Recovery (DRaaS) and instant Innovation, and redefines enterprise infrastructure with its cloud native subscription offerings for mission critical SAP workloads.
With billions of sensors deployed worldwide, the amount of machine-generated data will soon exceed what our networks can handle. But consumers and businesses will expect seamless experiences and real-time responsiveness. What does this mean for IoT devices and the infrastructure that supports them? More of the data will need to be handled at - or closer to - the devices themselves.
In his session at DevOps Summit, Tapabrata Pal, Director of Enterprise Architecture at Capital One, will tell a story about how Capital One has embraced Agile and DevOps Security practices across the Enterprise – driven by Enterprise Architecture; bringing in Development, Operations and Information Security organizations together. Capital Ones DevOpsSec practice is based upon three "pillars" – Shift-Left, Automate Everything, Dashboard Everything. Within about three years, from 100% waterfall, C...
Adding public cloud resources to an existing application can be a daunting process. The tools that you currently use to manage the software and hardware outside the cloud aren’t always the best tools to efficiently grow into the cloud. All of the major configuration management tools have cloud orchestration plugins that can be leveraged, but there are also cloud-native tools that can dramatically improve the efficiency of managing your application lifecycle.
SYS-CON Events announced today that Juniper Networks (NYSE: JNPR), an industry leader in automated, scalable and secure networks, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Juniper Networks challenges the status quo with products, solutions and services that transform the economics of networking. The company co-innovates with customers and partners to deliver automated, scalable and secure network...
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm. In his Day 3 Keynote at 20th Cloud Expo, Chris Brown, a Solutions Marketing Manager at Nutanix, will explore t...
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
SYS-CON Events announced today that Linux Academy, the foremost online Linux and cloud training platform and community, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Linux Academy was founded on the belief that providing high-quality, in-depth training should be available at an affordable price. Industry leaders in quality training, provided services, and student certification passes, its goal is to c...
Some people worry that OpenStack is more flash then substance; however, for many customers this could not be farther from the truth. No other technology equalizes the playing field between vendors while giving your internal teams better access than ever to infrastructure when they need it. In his session at 20th Cloud Expo, Chris Brown, a Solutions Marketing Manager at Nutanix, will talk through some real-world OpenStack deployments and look into the ways this can benefit customers of all sizes....
Deep learning has been very successful in social sciences and specially areas where there is a lot of data. Trading is another field that can be viewed as social science with a lot of data. With the advent of Deep Learning and Big Data technologies for efficient computation, we are finally able to use the same methods in investment management as we would in face recognition or in making chat-bots. In his session at 20th Cloud Expo, Gaurav Chakravorty, co-founder and Head of Strategy Development ...
SYS-CON Events announced today that CA Technologies has been named “Platinum Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY, and the 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. CA Technologies helps customers succeed in a future where every business – from apparel to energy – is being rewritten by software. From ...
SYS-CON Events announced today that Loom Systems will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Founded in 2015, Loom Systems delivers an advanced AI solution to predict and prevent problems in the digital business. Loom stands alone in the industry as an AI analysis platform requiring no prior math knowledge from operators, leveraging the existing staff to succeed in the digital era. With offices in S...