Click here to close now.




















Welcome!

Adobe Flex Authors: Matthew Lobas, PR.com Newswire, Shelly Palmer, Kevin Benedict

Related Topics: Adobe Flex, Java IoT

Adobe Flex: Article

Farata Systems Achieves Performance Breakthrough with Adobe BlazeDS

Thousands of Flex clients can concurrently communicate with Java using BlazeDS

Open sourcing of the highly compressed communication protocol AMF and server‐side Flex components play an important role in adoption of Flex by the enterprises. Live Cycle Data Services (LCDS) is an excellent solution for building scalable RIA, but it’s not cheap. For those who don’t have a budget for LCDS, Adobe has released BlazeDS, the open source implementation of AMF communication protocol.

The Theory
BlazeDS was offered as a free version of LCDS Flex remoting that also promised scaled down support of a modest number of concurrent users for data push.
But the enterprise clients wanted the best of both worlds: an inexpensive and scalable solution. The great part about LCDS and BlazeDS is that their code base is extendable and you can try to make the code do new things. The problem is that the base code is targeting only conventional Java Servlet container where BlazeDS is deployed, and performance/scalability of BlazeDS also depends on the number of concurrent connections supported by your server such as Tomcat, JBoss, WebSphere et al.

Farata Systems architects started experiments in this area when the prerelease of Jetty 7 became available. Jetty is a mature open source server that supports Java Servlet 3.0 specification (JSR 315).

BlazeDS runs in a servlet container, which maintains a thread pool. Each thread is given to a client request and is returned back to the reusable pool after the client is served. When the client uses so called long running connection that thread becomes locked by that client as it never finishes the request. So the number of the concurrent subscribers in BlazeDS depends on the number of threads a particular servlet container can hold.

While BlazeDS is preconfigured with just 10 simultaneous connections, it can be increased to several hundreds, and the actual number depends on the server's threading configuration, CPU and the size of its JVM heap memory. This number can also be affected by the number of messages processed by server in the unit of time and size of the messages.

Non-blocking I/O combined with Servlet 3.0 architectureallowsyou to write the code that is not tied to available server threads. The servlet container sends a request for execution and puts it in a suspended mode releasing the thread for other requests. When the result comes back, it resumes the processing of the request efficiently recycling a smaller number of threads. Because of that, the number of streaming connections can be increased to thousands.

The Test
The first goal was to create a module for BlazeDS to support the Servlet 3.0 with the messaging based on the AMF streaming. Thus test was set with Jetty - the first servlet container that implements Servlet 3.0 API. In less than six months this specification will be supported by most of the J2EE application servers. Additional endpoints ( components responsible for binding actual application services with servlet container ) were created based on BlazeDS open source implementation.

Tree small changes are required to add nio endpoints to a standard BlazeDS (or LCDS for that matter) application in the standard Jetty installation:

a) Add Farata’s nioblazeds.jar to Jetty’s lib folder

b) Modify the services-config.xml file of BlazeDS to change the standard thread-based end point for AMF streaming with Farata’s NioAmfEndpoint that supports Servlet 3.0 API.

c) Increase the parameter of the Jetty’s number of open file handlers based on the number of concurrent users requests you are planning to process.

The Trader Desktop, a sample application that comes with BlazeDS was successfully deployed under BlazeDS/Jetty and tested without any changes with enhanced endpoints.

The next step was to stress test this application using one of the commercial testing software suites that support AMF protocol. Farata engineers teamed up with Neotys, creator of a robust stress testing product called NeoLoad, that allows to emulate workload of tens of thousands of users hitting a server via both HTTP and AMF protocols.

Now you can watch a short screencast of the test that emulates 5000 users working with the Trader Desktop over the 5 minute period. The test starts with 200 users ramping up at the rate of 500 users per 10 seconds.

In this demo, the server side feed sends the messages about the latest stock prices to the Flex subscribers. After that, you’ll be monitoring this process using ds-console, yet another sample application that comes with
BlazeDS. First, the monitor will show just one client with a small number of messages, and the number of maximum streaming client is set to 65535.

Then you’ll see how easy it is with Neoload to load a large number of the users. The test uses 5 machines to emulate the load. The push count is the number of messages sent by the server. The test runs on a 8-cpu machine. Watch the number of allocated threads and the number of users – the number of threads is several times lower than the number of users at any given time. Please note that even when the number of users grows, the number of threads doesn’t. These processes are not expensive neither from the memory not from the CPU utilization perspective.

In this test the system was purposely restricted by introducing throttling in the Feed.java.

During this 5 minute test the server sent about 2.1 million messages. Since the first three minutes (180 seconds) of the test Neoload was ramping up the number of users until it reached 5000, count this time as a half or 90 seconds. Adding another two minutes brings the adjusted test time to 210 seconds or 10000 messages per second. This means that that each of 5000 users received 2 messages per second, which matches the throttling parameter that was set( in Feed.java we specified 400ms of sleep time between messages broadcast). Based on the server CPU and memory utilization we should have no problem supporting over 12000 users on this configuration as long as bandwidth and external load generators are added.

One of the machines used in this test was an 8-core MacPro for the server and four of the cores were shared with the VM emulating one of the client’s machine. There were also two 3Ghz desktops, one MacBook Pro and one 2Ghz Dell laptop - that’s the one that will work really hard trying to parse 300 messages per second. Actually, NeoLoad goes a little too hard on the client trying to even parse AMF messages on the machine running thousands of simulated clients.

The screencast of the stress test is located at http://myflex.org//demos/JettyBlazeDS/JettyBlazeDSloadTest.html .


Comparing with conventional and other technologies
Farata ran the same test with Apache Tomcat server using traditional thread-based I/O and standard BlazeDS long polling. Tomcat comes preconfigured with 250 threads. After increasing gradually this number, the same test can run for about 800 users, but pretty soon the system becomes unstable running out of threads and giving out of memory errors.

Tomcat also has experimental NIO implementation of servlet container named Comet. Farata has also created an endpoint adapter to utilize this feature of Jetty with BlazeDS. But while holding high promises of more efficient full duplex protocol the current Tomcat Comet implementation had some reliability issues.

Conclusion
The screencast should be treated as feasibility study and technical comment and not the benchmark of any sort as it still has a lot of room for improvement. More tests are required against the final release of Servlet 3 implementation for proper scalability benchmark for different servers/configurations.

Based on these results, you may consider using open source BlazeDS in the most demanding enterprise Flex applications. To be fair, we need to mention that LCDS is more than a data push, but if you are looking for a no-cost extensible solution that works in a standard Web environment with corporate firewalls and require session management, properly tuned BlazeDS becomes a good scalable solution for you next RIA.

More Stories By Flex News Desk

Flex News Desk provides the very latest news on the cross-platform Flex development framework for creating rich Internet applications, and on Adobe's AIR/Flex/Flash product combination.

Comments (4) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
Jedi 03/10/10 08:01:00 AM EST

Hello

I tried this setup. But I am getting this error:
I used jetty 6.1.22, 7.0.0, 7.0.1 and 8.0.0. But each time I did get this error:

java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isInitial()Z
at com.farata.nioblaze.messaging.endpoints.BaseNioHttpEndpoint.serviceStreamingRequest(BaseNioHttpEndpoint.java:1170)

What is causing this?

Yakov Fain 10/27/08 01:05:21 PM EDT

At this point these are just experiments that we perform to accommodate the need of some of our clients.

This year we are not planning to open source it, but most likely will do it next year when more J2EE app servers will start implementing Servlets 3.0 spec. As far as I know, Resin will be next.

[email protected] 10/27/08 07:02:33 AM EDT

Where can i find nioblazeds.jar? Is it or will it be open source?

frankyin 10/26/08 09:54:55 PM EDT

Sounds very interesting.
Is there any plan for blazeds release to support Jetty7.0? And how about the nioblazeds.jar, when this feature can be included in the blazeds release.

Thanks
Frank

@ThingsExpo Stories
As more intelligent IoT applications shift into gear, they’re merging into the ever-increasing traffic flow of the Internet. It won’t be long before we experience bottlenecks, as IoT traffic peaks during rush hours. Organizations that are unprepared will find themselves by the side of the road unable to cross back into the fast lane. As billions of new devices begin to communicate and exchange data – will your infrastructure be scalable enough to handle this new interconnected world?
WebRTC has had a real tough three or four years, and so have those working with it. Only a few short years ago, the development world were excited about WebRTC and proclaiming how awesome it was. You might have played with the technology a couple of years ago, only to find the extra infrastructure requirements were painful to implement and poorly documented. This probably left a bitter taste in your mouth, especially when things went wrong.
SYS-CON Events announced today that HPM Networks will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
As more and more data is generated from a variety of connected devices, the need to get insights from this data and predict future behavior and trends is increasingly essential for businesses. Real-time stream processing is needed in a variety of different industries such as Manufacturing, Oil and Gas, Automobile, Finance, Online Retail, Smart Grids, and Healthcare. Azure Stream Analytics is a fully managed distributed stream computation service that provides low latency, scalable processing of streaming data in the cloud with an enterprise grade SLA. It features built-in integration with Azur...
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
With the proliferation of connected devices underpinning new Internet of Things systems, Brandon Schulz, Director of Luxoft IoT – Retail, will be looking at the transformation of the retail customer experience in brick and mortar stores in his session at @ThingsExpo. Questions he will address include: Will beacons drop to the wayside like QR codes, or be a proximity-based profit driver? How will the customer experience change in stores of all types when everything can be instrumented and analyzed? As an area of investment, how might a retail company move towards an innovation methodolo...
Consumer IoT applications provide data about the user that just doesn’t exist in traditional PC or mobile web applications. This rich data, or “context,” enables the highly personalized consumer experiences that characterize many consumer IoT apps. This same data is also providing brands with unprecedented insight into how their connected products are being used, while, at the same time, powering highly targeted engagement and marketing opportunities. In his session at @ThingsExpo, Nathan Treloar, President and COO of Bebaio, will explore examples of brands transforming their businesses by t...
A producer of the first smartphones and tablets, presenter Lee M. Williams will talk about how he is now applying his experience in mobile technology to the design and development of the next generation of Environmental and Sustainability Services at ETwater. In his session at @ThingsExpo, Lee Williams, COO of ETwater, will talk about how he is now applying his experience in mobile technology to the design and development of the next generation of Environmental and Sustainability Services at ETwater.
SYS-CON Events announced today that Micron Technology, Inc., a global leader in advanced semiconductor systems, will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Micron’s broad portfolio of high-performance memory technologies – including DRAM, NAND and NOR Flash – is the basis for solid state drives, modules, multichip packages and other system solutions. Backed by more than 35 years of technology leadership, Micron's memory solutions enable the world's most innovative computing, consumer,...
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies leverage disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevOps to advance innovation and increase agility. Specializing in designing, imple...
While many app developers are comfortable building apps for the smartphone, there is a whole new world out there. In his session at @ThingsExpo, Narayan Sainaney, Co-founder and CTO of Mojio, will discuss how the business case for connected car apps is growing and, with open platform companies having already done the heavy lifting, there really is no barrier to entry.
Through WebRTC, audio and video communications are being embedded more easily than ever into applications, helping carriers, enterprises and independent software vendors deliver greater functionality to their end users. With today’s business world increasingly focused on outcomes, users’ growing calls for ease of use, and businesses craving smarter, tighter integration, what’s the next step in delivering a richer, more immersive experience? That richer, more fully integrated experience comes about through a Communications Platform as a Service which allows for messaging, screen sharing, video...
SYS-CON Events announced today that IceWarp will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IceWarp, the leader of cloud and on-premise messaging, delivers secured email, chat, documents, conferencing and collaboration to today's mobile workforce, all in one unified interface
The Internet of Things (IoT) is about the digitization of physical assets including sensors, devices, machines, gateways, and the network. It creates possibilities for significant value creation and new revenue generating business models via data democratization and ubiquitous analytics across IoT networks. The explosion of data in all forms in IoT requires a more robust and broader lens in order to enable smarter timely actions and better outcomes. Business operations become the key driver of IoT applications and projects. Business operations, IT, and data scientists need advanced analytics t...
Akana has announced the availability of the new Akana Healthcare Solution. The API-driven solution helps healthcare organizations accelerate their transition to being secure, digitally interoperable businesses. It leverages the Health Level Seven International Fast Healthcare Interoperability Resources (HL7 FHIR) standard to enable broader business use of medical data. Akana developed the Healthcare Solution in response to healthcare businesses that want to increase electronic, multi-device access to health records while reducing operating costs and complying with government regulations.
For IoT to grow as quickly as analyst firms’ project, a lot is going to fall on developers to quickly bring applications to market. But the lack of a standard development platform threatens to slow growth and make application development more time consuming and costly, much like we’ve seen in the mobile space. In his session at @ThingsExpo, Mike Weiner, Product Manager of the Omega DevCloud with KORE Telematics Inc., discussed the evolving requirements for developers as IoT matures and conducted a live demonstration of how quickly application development can happen when the need to comply wit...
The Internet of Everything (IoE) brings together people, process, data and things to make networked connections more relevant and valuable than ever before – transforming information into knowledge and knowledge into wisdom. IoE creates new capabilities, richer experiences, and unprecedented opportunities to improve business and government operations, decision making and mission support capabilities.
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at @ThingsExpo, James Kirkland, Red Hat's Chief Architect for the Internet of Things and Intelligent Systems, described how to revolutionize your archit...
MuleSoft has announced the findings of its 2015 Connectivity Benchmark Report on the adoption and business impact of APIs. The findings suggest traditional businesses are quickly evolving into "composable enterprises" built out of hundreds of connected software services, applications and devices. Most are embracing the Internet of Things (IoT) and microservices technologies like Docker. A majority are integrating wearables, like smart watches, and more than half plan to generate revenue with APIs within the next year.
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it! In her Opening Keynote at 16th Cloud Expo, Sandy Carter, IBM General Manager Cloud Ecosystem and Developers, and a Social Business Evangelist, d...