|By Chris Lockhart||
|July 29, 2005 05:15 PM EDT||
Given the broad range of configurations open to an infrastructure planner when dealing with WebSphere software, it’s no wonder there’s often a great deal of confusion when it comes to making a complex product like Portal highly available. Naturally, there’s no “Learn Clustering in 20 Minutes” manual, but there are general steps to follow and some to avoid.
Let’s start with a very basic explanation of the WebSphere cell and how the Portal fits into it. (See Figure 1.)
A basic WebSphere AppServer install is often on a single machine typically referred to as a node. A simple enterprise infrastructure might include several AppServer nodes each doing their own tasks. As the infrastructure evolves and grows more complex, the need arises to simplify operational management of the multiple nodes. The Network Deployment incarnation of the WebSphere Application Server gives you the ability to manage and control multiple Application Servers centrally. The configuration of security parameters, user directories, and JNDI resources is greatly simplified by this centralization of operational management. Instead of deploying code to three different WebSphere machines, I can now deploy once and have the Network Deployment services distribute the code for me. The combination of the Network Deployment Manager and the Application Servers it manages represent the WebSphere Cell.(See Figure 2.)
The process of adding Application Server nodes to the cell is called federation. Its opposite, unfederation, describes removing a node from a Cell and returning it to standalone status.
The Deployment Manager communicates with Cell members via a small JVM called the nodeagent located on each of the managed nodes. The Deployment Manager will keep track of all configuration changes and use the nodeagents on the federated nodes to “synchronize” the configurations so they all represent what’s defined in the master configuration on the Deployment Manager itself.
In many respects Portal is no different than any other web application that would be configured to run in a WebSphere Cell. Just like a regular webapp, I could choose to run Portal on a single node in the Cell or on multiple nodes or even have multiple instances running on a single node. (See Figure 3.)
Unlike a regular Web application, Portal uses several other services that aren’t part of the regular WebSphere Application Server product set. As such, there’s a completely separate installation that must exist on each node that you want to run Portal.
A Network Deployment infrastructure consisting of several WebSphere AppServer nodes gives you tremendous advantages that could (and do) fill entire Red Books. For purposes of the Portal, four are of primary importance:
- Simplification of the operational management
- Central management of the Portal configurations
- Highly available environment
- Session and cache data replicated between all Portal nodes
Which Way To Cluster?
Starting with Portal 5.1, there are two ways to establish a Portals cluster. The first way is to build a WebSphere Cell out of multiple federated nodes and then install Portal on each node in the existing Cell. The second way is to take a set of standalone nodes with Portal already installed on them and federate them into a Cell. Which is the better way? Well, that depends.
Using an existing Cell of AppServers and simply installing Portal into that topology is easiest, but has its drawbacks. When an Application Server node is federated into a Cell, it loses its default configuration and assumes the configuration dictated by the Network Deployment Manager. If the node is unfederated at any time, then the original configuration is loaded from a backup copy and the node reverts to its standalone state. Therefore, if I have a node that’s already been federated and then install an application on it, if that node ever gets unfederated it will revert to its default state and the application I installed on it will go away. You can see the limitation here. I could not unfederate a Portal node and have it still be a Portal node.
Conversely, if I have a standalone node on which I install Portal and then federate it, the Portal is part of the node’s original pre-federated configuration and will always be present on the node, even if it gets unfederated. Unfortunately, doing it this way is more complicated and prone to error and endless frustration. Historically this has been the only way to cluster the Portal and it has led to many late nights and high consulting fees.
A real-world recommendation, one that recognizes impossible deadlines, unrealistic demands, and the constant need to document procedures, would be to go the first route. Build your Cell of federated WebSphere nodes, verify that they function, then add Portal to the mix. It’s less flexible, but I think you’ll find yourself going home at 5pm more often.
Naturally you first have to install WebSphere Application Server. Let’s assume you can get this far and you have two WAS nodes (WAS1 and WAS2) installed and ready to go at version 5.1.x. There are no Web applications installed other than the default ones. You have also installed and configured a Network Deployment Manager (DM1) for version 5.1.x. For argument’s sake, let’s say each component is installed on a separate Windows machine.
In our scenario, WebSphere Global Security isn’t enabled (yet). This makes the federation process easy. On each of the two WAS nodes you would execute the following:
HostName DM1_SOAP_PortBy default, the SOAP port of the Deployment Manager out-of-the-box is 8879.
Once executed, you’ll see the console output describing the federation process. When it’s complete on both nodes, you’ll have a Cell. See? Easy. Now let’s put Portal into the mix.
Installing the Portal
Our plan is to install Portal first on WAS1, do some basic configuration, then install what’s called a “secondary” Portal on WAS2. Prior to installing Portal anywhere, however, we must ensure that the WAS1 and WAS2 nodes have any and all patches/efixes required by the Portal release that we’re installing. In our example, we’re going to install Portal 5.1.
At this point you go ahead and install Portal on WAS1. This is a Custom Install. You’ll be choosing the Application Server that’s already installed on this node and federated into the Cell. The installer will recognize that this is a federated node and prompt you to designate whether this is a primary or secondary node. Since this is the first install, you must select primary node. The installer will interface with the Deployment Manager controlling this node and install the appropriate files.
- Execute the installer on WAS1
- Agree to the terms. Click Next. (See Figure 4.)
- Select Custom. Click Next. (See Figure 5.)
- Select the instance that you want to use from the list. If the installation program doesn’t detect an instance of WebSphere Application Server but you know that it’s on the machine, you can enter the directory path to the WebSphere Application Server. Click Next. (See Figure 6.)
- Select Primary, and click Next. (See Figure 7.)
- Specify the directory where you want to install the WebSphere Portal. Click Next. (See Figure 8.)
- Verify the components to be installed and click Next.
- When the installation is finished, the installation program displays a confirmation panel listing the components that have been installed.
- Click Finish.
|Shanthi 01/31/06 07:03:33 AM EST|
This was a great article .. helped me understand clustering better. I was looking for a way to add a node into a pre-configured cluster and this article pointed me in the right direction. I am going to use this as reference for my production deploy.
|WebSphere News Desk 07/29/05 04:39:57 PM EDT|
Your Guide to Portal Clustering in WebSphere Portal Server 5.1. Some things in WebSphere PortalServer work well and are well documented. Other things are well documented and work well in theory. Still other things have okay documentation and will work well when all of the WebSphere stars are aligned. Depending on your implementation, Portal Clustering can fit into all three categories.
SYS-CON Events announced today that Red Hat, the world's leading provider of open source solutions, will exhibit at Internet of @ThingsExpo, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Red Hat is the world's leading provider of open source software solutions, using a community-powered approach to reliable and high-performing cloud, Linux, middleware, storage and virtualization technologies. Red Hat also offers award-winning support, training, and consulting services. As the connective hub in a global network of enterprises, partners, a...
Oct. 20, 2014 01:15 PM EDT Reads: 354
The Internet of Things (IoT) is making everything it touches smarter – smart devices, smart cars and smart cities. And lucky us, we’re just beginning to reap the benefits as we work toward a networked society. However, this technology-driven innovation is impacting more than just individuals. The IoT has an environmental impact as well, which brings us to the theme of this month’s #IoTuesday Twitter chat. The ability to remove inefficiencies through connected objects is driving change throughout every sector, including waste management. BigBelly Solar, located just outside of Boston, is trans...
Oct. 20, 2014 01:00 PM EDT Reads: 579
The Transparent Cloud-computing Consortium (abbreviation: T-Cloud Consortium) will conduct research activities into changes in the computing model as a result of collaboration between "device" and "cloud" and the creation of new value and markets through organic data processing High speed and high quality networks, and dramatic improvements in computer processing capabilities, have greatly changed the nature of applications and made the storing and processing of data on the network commonplace.
Oct. 20, 2014 01:00 PM EDT Reads: 1,395
Software AG helps organizations transform into Digital Enterprises, so they can differentiate from competitors and better engage customers, partners and employees. Using the Software AG Suite, companies can close the gap between business and IT to create digital systems of differentiation that drive front-line agility. We offer four on-ramps to the Digital Enterprise: alignment through collaborative process analysis; transformation through portfolio management; agility through process automation and integration; and visibility through intelligent business operations and big data.
Oct. 20, 2014 12:45 PM EDT Reads: 1,375
The Internet of Things (IoT) is going to require a new way of thinking and of developing software for speed, security and innovation. This requires IT leaders to balance business as usual while anticipating for the next market and technology trends. Cloud provides the right IT asset portfolio to help today’s IT leaders manage the old and prepare for the new. Today the cloud conversation is evolving from private and public to hybrid. This session will provide use cases and insights to reinforce the value of the network in helping organizations to maximize their company’s cloud experience.
Oct. 20, 2014 12:00 PM EDT Reads: 1,739
Things are being built upon cloud foundations to transform organizations. This CEO Power Panel at 15th Cloud Expo, moderated by Roger Strukhoff, Cloud Expo and @ThingsExpo conference chair, will address the big issues involving these technologies and, more important, the results they will achieve. How important are public, private, and hybrid cloud to the enterprise? How does one define Big Data? And how is the IoT tying all this together?
Oct. 20, 2014 12:00 PM EDT Reads: 1,444
TechCrunch reported that "Berlin-based relayr, maker of the WunderBar, an Internet of Things (IoT) hardware dev kit which resembles a chunky chocolate bar, has closed a $2.3 million seed round, from unnamed U.S. and Switzerland-based investors. The startup had previously raised a €250,000 friend and family round, and had been on track to close a €500,000 seed earlier this year — but received a higher funding offer from a different set of investors, which is the $2.3M round it’s reporting."
Oct. 20, 2014 09:00 AM EDT Reads: 1,375
Predicted by Gartner to add $1.9 trillion to the global economy by 2020, the Internet of Everything (IoE) is based on the idea that devices, systems and services will connect in simple, transparent ways, enabling seamless interactions among devices across brands and sectors. As this vision unfolds, it is clear that no single company can accomplish the level of interoperability required to support the horizontal aspects of the IoE. The AllSeen Alliance, announced in December 2013, was formed with the goal to advance IoE adoption and innovation in the connected home, healthcare, education, aut...
Oct. 19, 2014 11:45 PM EDT Reads: 1,227
The Industrial Internet revolution is now underway, enabled by connected machines and billions of devices that communicate and collaborate. The massive amounts of Big Data requiring real-time analysis is flooding legacy IT systems and giving way to cloud environments that can handle the unpredictable workloads. Yet many barriers remain until we can fully realize the opportunities and benefits from the convergence of machines and devices with Big Data and the cloud, including interoperability, data security and privacy.
Oct. 19, 2014 10:00 PM EDT Reads: 1,355
All major researchers estimate there will be tens of billions devices - computers, smartphones, tablets, and sensors - connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades. Over the summer Gartner released its much anticipated annual Hype Cycle report and the big news is that Internet of Things has now replaced Big Data as the most hyped technology. Indeed, we're hearing more and more about this fascinating new technological paradigm. Every other IT news item seems to be about IoT and its implications on the future of digital busines...
Oct. 19, 2014 09:00 PM EDT Reads: 1,557
Cultural, regulatory, environmental, political and economic (CREPE) conditions over the past decade are creating cross-industry solution spaces that require processes and technologies from both the Internet of Things (IoT), and Data Management and Analytics (DMA). These solution spaces are evolving into Sensor Analytics Ecosystems (SAE) that represent significant new opportunities for organizations of all types. Public Utilities throughout the world, providing electricity, natural gas and water, are pursuing SmartGrid initiatives that represent one of the more mature examples of SAE. We have s...
Oct. 19, 2014 07:30 PM EDT Reads: 1,288
The Internet of Things needs an entirely new security model, or does it? Can we save some old and tested controls for the latest emerging and different technology environments? In his session at Internet of @ThingsExpo, Davi Ottenheimer, EMC Senior Director of Trust, will review hands-on lessons with IoT devices and reveal privacy options and a new risk balance you might not expect.
Oct. 19, 2014 11:00 AM EDT Reads: 1,810
IoT is still a vague buzzword for many people. In his session at Internet of @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, will discuss the business value of IoT that goes far beyond the general public's perception that IoT is all about wearables and home consumer services. The presentation will also discuss how IoT is perceived by investors and how venture capitalist access this space. Other topics to discuss are barriers to success, what is new, what is old, and what the future may hold.
Oct. 19, 2014 11:00 AM EDT Reads: 1,610
Swiss innovators dizmo Inc. launches its ground-breaking software, which turns any digital surface into an immersive platform. The dizmo platform seamlessly connects digital and physical objects in the home and at the workplace. Dizmo breaks down traditional boundaries between device, operating systems, apps and software, transforming the way users work, play and live. It supports orchestration and collaboration in an unparalleled way enabling any data to instantaneously be accessed on any surface, anywhere and made interactive. Dizmo brings fantasies as seen in Sci-fi movies such as Iro...
Oct. 18, 2014 10:00 PM EDT Reads: 1,763
There’s Big Data, then there’s really Big Data from the Internet of Things. IoT is evolving to include many data possibilities like new types of event, log and network data. The volumes are enormous, generating tens of billions of logs per day, which raise data challenges. Early IoT deployments are relying heavily on both the cloud and managed service providers to navigate these challenges. In her session at 6th Big Data Expo®, Hannah Smalltree, Director at Treasure Data, to discuss how IoT, Big Data and deployments are processing massive data volumes from wearables, utilities and other mach...
Oct. 18, 2014 05:00 PM EDT Reads: 1,842
This Internet of Nouns trend is still in the early stages and many of our already connected gadgets do provide human benefits over the typical infotainment. Internet of Things or IoT. You know, where everyday objects have software, chips, and sensors to capture data and report back. Household items like refrigerators, toilets and thermostats along with clothing, cars and soon, the entire home will be connected. Many of these devices provide actionable data - or just fun entertainment - so people can make decisions about whatever is being monitored. It can also help save lives.
Oct. 18, 2014 03:30 PM EDT Reads: 1,555
All major researchers estimate there will be tens of billions devices – computers, smartphones, tablets, and sensors – connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades. With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo in Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be!
Oct. 18, 2014 08:00 AM EDT Reads: 2,598
Whether you're a startup or a 100 year old enterprise, the Internet of Things offers a variety of new capabilities for your business. IoT style solutions can help you get closer your customers, launch new product lines and take over an industry. Some companies are dipping their toes in, but many have already taken the plunge, all while dramatic new capabilities continue to emerge. In his session at Internet of @ThingsExpo, Reid Carlberg, Senior Director, Developer Evangelism at salesforce.com, to discuss real-world use cases, patterns and opportunities you can harness today.
Oct. 18, 2014 08:00 AM EDT Reads: 1,760
Arrow Electronics Inc. announced its Internet of Things Immersions Roadshow that will showcase how “Interconnected Intelligence” is changing the way the world interacts and solves problems with technology. The Immersions tour will engage the world’s top technology leaders to discuss comprehensive Internet of Things (IoT) building blocks and how businesses can leverage Interconnected Intelligence to improve lives throughout the world. With forums in four key U.S. markets, Arrow connects technology developers with leading-edge suppliers to provide insights about IoT technologies and services,...
Oct. 17, 2014 05:30 PM EDT Reads: 1,460
The Internet of Things is not new. Historically, smart businesses have used its basic concept of leveraging data to drive better decision making and have capitalized on those insights to realize additional revenue opportunities. So, what has changed to make the Internet of Things one of the hottest topics in tech? In his session at Internet of @ThingsExpo, Chris Gray, Director, Embedded and Internet of Things, will discuss the underlying factors that are driving the economics of intelligent systems. Discover how hardware commoditization, the ubiquitous nature of connectivity, and the emergen...
Oct. 17, 2014 04:00 PM EDT Reads: 1,717