|By Jon Walker||
|June 14, 2005 10:00 AM EDT||
As with all big conferences, LinuxWorld Boston earlier this year had a few broad themes that you couldn't help be exposed to just by walking the floor. One that caught me by surprise was the excitement around thin client Linux. At first I attributed it to a combination of the big vendors pushing blade computing and the malaise that had developed around desktop Linux. For the past few years the battle cry had been "This is the year of Linux on the desktop." Linus Torvalds himself made the assertion in a few interviews. Well...Windows hasn't been crushed in an avalanche of Linux adoption on the desktop. I personally believe that desktop Linux is going to be less of an avalanche and more like the buildup of sand on the beach - gradual, constant, and imperceptible to the casual onlooker. The lack of widespread adoption however had people like Jeremy White of Codeweavers talking about going through the five stages of grief (denial, anger, bargaining, depression, acceptance) when they discovered that the year of the Linux desktop had yet to arrive.
Initially I viewed thin client Linux as a symptom of the third stage of grief - bargaining. I pictured people telling themselves "If desktop Linux isn't going to take over the world, maybe thin client Linux can." After all, I had seen Larry Ellison and Oracle with his "Network Computer" (along with Sun and others) bet big on the thin client as a Windows killer in the mid-90s only to have it go nowhere. The idea of ending Microsoft's reign over the desktop with an entirely new architecture is appealing. I couldn't just dismiss it out of hand as wishful thinking by those heavily invested in desktop Linux however. I personally knew some businesses that were using thin client infrastructures very successfully. In the mid-90s this was definitely not the case. Harrison Ford once said, "We all have big changes in our lives that are more or less a second chance." Had thin client actually changed since the mid-90s or was this just an undeserved second chance?
What Is a Thin Client?
The basic premise of thin client computing is that a number of users can get most of their computing resources (disk and CPU) from a central server and use their local machine just for display and input (keyboard and mouse). This lets cheap, underpowered computers (or repurposed old computers) be put on each user's desktop. Each of these then connect to a more powerful central server to run applications. In the purest thin client scenario the client computers are diskless and even boot an operating system over the network via the thin client server, which begs the question: How is Linux especially suited for this purpose?
Why Thin Client Linux Works
Thin client Linux works for two reasons. First, almost accidentally, Linux does a great job of separating application data (or "shareable data," as it's sometimes called) from user data. Application data is the general configuration of an application needed to make it work for all users (for example, the set of standard document templates in OpenOffice). User data is the configuration information that's changed by and specific to each individual user. The user's custom dictionary in OpenOffice is an example. Web browser bookmarks are another example. I say "almost accidentally" because Linux, like Unix, was designed as a secure multiuser system and the separation of application data grew out of that design. This system encourages individual users to run in their own environment with access only to their own individual portion of the file system. Applications that don't store user data in each individual user's portion of the file system simply don't work on Linux. This creates a strong incentive for application developers to develop their applications to separate user data from application data. Another contributing factor is the fact that a central "registry" for application data came late to the Linux world. This allowed the developers of the major Linux desktop environments to avoid the problems of the Windows registry by storing the user-specific portions of the registry in the individual user's portion of the file system. For these two reasons virtually all Linux applications store user data correctly. This may seem common sense, but I can assure you the same is not true on the Windows desktop. Large numbers of Windows applications store user data in shared areas (like c:\program files) despite the fact that Windows has been a multiuser system for some time now and Microsoft has greatly discouraged this practice.
The second reason thin client Linux works is that Linux's user interface is built on top of the X Window System, which is client/server based even when running on the same computer. In X Windows terminology, the client (or application) can use the X Window server (the display) to display the desktop, show application windows, access input, etc. Although the names client and server are reversed in the X Windows/thin client terminology, this is exactly what a thin client requires. The ability to display an application that's being run on a central server on a remote client computer is fundamental to thin client computing and is built into Linux through X Windows.
These two aspects of the Linux architecture significantly reduce the effort required to develop thin client solutions based on Linux. Let's take a look at some of the current solutions available.
Thin client implementations currently available range from documents that cobble together publicly available tools (see http://trieste.linux.it/documenti/ThinClient.html, for example) to full-blown commercial thin client packages that include both hardware and software.
The most well-known thin client solution for Linux is the Linux Terminal Server Project or LTSP (www.ltsp.org), a mature Open Source project that installs on a Linux server and lets you boot Linux clients via a number of different methods including PXE, which is supported by most modern network cards. LTSP relies on the X Windows protocol and NFS, a protocol for sharing files over the network that provides thin client support. To install LTSP on a client you must build a special client kernel (or use one of the pre-compiled ones that are supplied). LTSP can be a little difficult to set up but projects based on LTSP that simplify setup are already popping up. The Norwegian Skolelinux ("skole" means "school") is LTSP with expanded documentation and a simplified installation.
There are a number of other Linux-based thin client solutions. PXES (http://pxes.sourceforge.net) is a "micro" Linux distribution that can be used to access a thin client server using the X Windows protocol (like LTSP) as well as a number of other protocols including VNC, which is a remote control protocol originally developed by AT&T and available on Linux.
Another project that has drawn some interest lately is Ndiyo! (pronounced nn-dee-yo). It's attempting to develop an "ultra-thin" client (video and Ethernet adapter) that can eventually be incorporated directly into a monitor. Ndiyo! is an effort of Newnham Research in the UK (www.newnhamresearch.com/). It's not ready for enterprise deployment but stay tuned.
|SijiSunny 04/24/06 07:59:54 AM EDT|
I am siji Sunny from C-DAC Mumbai working with OpenSource Research And Development and now I am working with Thin Client machines with Indian Language support in Client side and I had did it
|SijiSunny 04/24/06 07:59:37 AM EDT|
I am siji Sunny from C-DAC Mumbai working with OpenSource Research And Development and now I am working with Thin Client machines with Indian Language support in Client side and I had did it
|dtmilano 06/15/05 12:17:21 PM EDT|
PXES Universal Linux Thin Client I:
PXES Universal Linux Thin Client II:
"For over 25 years we have been working with a lot of enterprise customers and we have seen how companies create applications. And now that we have moved to cloud computing, mobile, social and the Internet of Things, we see that the market needs a new way of creating applications," stated Jesse Shiah, CEO, President and Co-Founder of AgilePoint Inc., in this SYS-CON.tv interview at 15th Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 17, 2014 08:00 PM EST Reads: 1,960
"At our booth we are showing how to provide trust in the Internet of Things. Trust is where everything starts to become secure and trustworthy. Now with the scaling of the Internet of Things it becomes an interesting question – I've heard numbers from 200 billion devices next year up to a trillion in the next 10 to 15 years," explained Johannes Lintzen, Vice President of Sales at Utimaco, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 17, 2014 08:00 PM EST Reads: 1,956
The Internet of Things is a misnomer. That implies that everything is on the Internet, and that simply should not be - especially for things that are blurring the line between medical devices that stimulate like a pacemaker and quantified self-sensors like a pedometer or pulse tracker. The mesh of things that we manage must be segmented into zones of trust for sensing data, transmitting data, receiving command and control administrative changes, and peer-to-peer mesh messaging. In his session at @ThingsExpo, Ryan Bagnulo, Solution Architect / Software Engineer at SOA Software, focused on desi...
Dec. 17, 2014 07:15 PM EST Reads: 1,889
SYS-CON Events announced today that Gridstore™, the leader in hyper-converged infrastructure purpose-built to optimize Microsoft workloads, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Gridstore™ is the leader in hyper-converged infrastructure purpose-built for Microsoft workloads and designed to accelerate applications in virtualized environments. Gridstore’s hyper-converged infrastructure is the industry’s first all flash version of HyperConverged Appliances that include both compute and storag...
Dec. 17, 2014 06:30 PM EST Reads: 1,818
"People are a lot more knowledgeable about APIs now. There are two types of people who work with APIs - IT people who want to use APIs for something internal and the product managers who want to do something outside APIs for people to connect to them," explained Roberto Medrano, Executive Vice President at SOA Software, in this SYS-CON.tv interview at Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 17, 2014 06:00 PM EST Reads: 1,794
Today’s enterprise is being driven by disruptive competitive and human capital requirements to provide enterprise application access through not only desktops, but also mobile devices. To retrofit existing programs across all these devices using traditional programming methods is very costly and time consuming – often prohibitively so. In his session at @ThingsExpo, Jesse Shiah, CEO, President, and Co-Founder of AgilePoint Inc., discussed how you can create applications that run on all mobile devices as well as laptops and desktops using a visual drag-and-drop application – and eForms-buildi...
Dec. 17, 2014 11:45 AM EST Reads: 2,062
We certainly live in interesting technological times. And no more interesting than the current competing IoT standards for connectivity. Various standards bodies, approaches, and ecosystems are vying for mindshare and positioning for a competitive edge. It is clear that when the dust settles, we will have new protocols, evolved protocols, that will change the way we interact with devices and infrastructure. We will also have evolved web protocols, like HTTP/2, that will be changing the very core of our infrastructures. At the same time, we have old approaches made new again like micro-services...
Dec. 16, 2014 11:45 PM EST Reads: 1,925
Code Halos - aka "digital fingerprints" - are the key organizing principle to understand a) how dumb things become smart and b) how to monetize this dynamic. In his session at @ThingsExpo, Robert Brown, AVP, Center for the Future of Work at Cognizant Technology Solutions, outlined research, analysis and recommendations from his recently published book on this phenomena on the way leading edge organizations like GE and Disney are unlocking the Internet of Things opportunity and what steps your organization should be taking to position itself for the next platform of digital competition.
Dec. 15, 2014 11:45 PM EST Reads: 2,394
The 3rd International Internet of @ThingsExpo, co-located with the 16th International Cloud Expo - to be held June 9-11, 2015, at the Javits Center in New York City, NY - announces that its Call for Papers is now open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
Dec. 15, 2014 10:30 AM EST Reads: 8,047
As the Internet of Things unfolds, mobile and wearable devices are blurring the line between physical and digital, integrating ever more closely with our interests, our routines, our daily lives. Contextual computing and smart, sensor-equipped spaces bring the potential to walk through a world that recognizes us and responds accordingly. We become continuous transmitters and receivers of data. In his session at @ThingsExpo, Andrew Bolwell, Director of Innovation for HP's Printing and Personal Systems Group, discussed how key attributes of mobile technology – touch input, sensors, social, and ...
Dec. 15, 2014 10:00 AM EST Reads: 3,225
In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect at GE, and Ibrahim Gokcen, who leads GE's advanced IoT analytics, focused on the Internet of Things / Industrial Internet and how to make it operational for business end-users. Learn about the challenges posed by machine and sensor data and how to marry it with enterprise data. They also discussed the tips and tricks to provide the Industrial Internet as an end-user consumable service using Big Data Analytics and Industrial Cloud.
Dec. 15, 2014 10:00 AM EST Reads: 2,331
Building low-cost wearable devices can enhance the quality of our lives. In his session at Internet of @ThingsExpo, Sai Yamanoor, Embedded Software Engineer at Altschool, provided an example of putting together a small keychain within a $50 budget that educates the user about the air quality in their surroundings. He also provided examples such as building a wearable device that provides transit or recreational information. He then reviewed the resources available to build wearable devices at home including open source hardware, the raw materials required and the options available to power s...
Dec. 15, 2014 09:00 AM EST Reads: 2,438
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, addressed the big issues involving these technologies and, more important, the results they will achieve. Rodney Rogers, chairman and CEO of Virtustream; Brendan O'Brien, co-founder of Aria Systems, Bart Copeland, president and CEO of ActiveState Software; Jim Cowie, chief scientist at Dyn; Dave Wagstaff, VP and chief architect at BSQUARE Corporation; Seth Proctor, CTO of NuoDB, Inc.; and Andris Gailitis, C...
Dec. 15, 2014 09:00 AM EST Reads: 2,146
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 Big Data Expo®, Hannah Smalltree, Director at Treasure Data, discussed how IoT, Big Data and deployments are processing massive data volumes from wearables, utilities and other machines...
Dec. 15, 2014 08:45 AM EST Reads: 3,104
"There is a natural synchronization between the business models, the IoT is there to support ,” explained Brendan O'Brien, Co-founder and Chief Architect of Aria Systems, in this SYS-CON.tv interview at the 15th International Cloud Expo®, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Dec. 15, 2014 08:15 AM EST Reads: 3,503
SYS-CON Media announced that Splunk, a provider of the leading software platform for real-time Operational Intelligence, has launched an ad campaign on Big Data Journal. Splunk software and cloud services enable organizations to search, monitor, analyze and visualize machine-generated big data coming from websites, applications, servers, networks, sensors and mobile devices. The ads focus on delivering ROI - how improved uptime delivered $6M in annual ROI, improving customer operations by mining large volumes of unstructured data, and how data tracking delivers uptime when it matters most.
Dec. 15, 2014 06:45 AM EST Reads: 3,222
In this Women in Technology Power Panel at 15th Cloud Expo, moderated by Anne Plese, Senior Consultant, Cloud Product Marketing at Verizon Enterprise, Esmeralda Swartz, CMO at MetraTech; Evelyn de Souza, Data Privacy and Compliance Strategy Leader at Cisco Systems; Seema Jethani, Director of Product Management at Basho Technologies; Victoria Livschitz, CEO of Qubell Inc.; Anne Hungate, Senior Director of Software Quality at DIRECTV, discussed what path they took to find their spot within the technology industry and how do they see opportunities for other women in their area of expertise.
Dec. 15, 2014 04:00 AM EST Reads: 2,137
While great strides have been made relative to the video aspects of remote collaboration, audio technology has basically stagnated. Typically all audio is mixed to a single monaural stream and emanates from a single point, such as a speakerphone or a speaker associated with a video monitor. This leads to confusion and lack of understanding among participants especially regarding who is actually speaking. Spatial teleconferencing introduces the concept of acoustic spatial separation between conference participants in three dimensional space. This has been shown to significantly improve comprehe...
Dec. 12, 2014 05:00 PM EST Reads: 1,878
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.
Dec. 11, 2014 06:00 PM EST Reads: 2,185
Performance is the intersection of power, agility, control, and choice. If you value performance, and more specifically consistent performance, you need to look beyond simple virtualized compute. Many factors need to be considered to create a truly performant environment. In his General Session at 15th Cloud Expo, Harold Hannon, Sr. Software Architect at SoftLayer, discussed how to take advantage of a multitude of compute options and platform features to make cloud the cornerstone of your online presence.
Dec. 11, 2014 03:15 PM EST Reads: 3,003