Welcome!

Java IoT Authors: Liz McMillan, Carmen Gonzalez, Yeshim Deniz, Pat Romanski, Elizabeth White

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
NHK, Japan Broadcasting, will feature the upcoming @ThingsExpo Silicon Valley in a special 'Internet of Things' and smart technology documentary that will be filmed on the expo floor between November 3 to 5, 2015, in Santa Clara. NHK is the sole public TV network in Japan equivalent to the BBC in the UK and the largest in Asia with many award-winning science and technology programs. Japanese TV is producing a documentary about IoT and Smart technology and will be covering @ThingsExpo Silicon Val...
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.
SYS-CON Events announced today that CollabNet, a global leader in enterprise software development, release automation and DevOps solutions, will be a Bronze Sponsor of SYS-CON's 20th International Cloud Expo®, taking place from June 6-8, 2017, at the Javits Center in New York City, NY. CollabNet offers a broad range of solutions with the mission of helping modern organizations deliver quality software at speed. The company’s latest innovation, the DevOps Lifecycle Manager (DLM), supports Value S...
SYS-CON Events announced today that Hitachi, the leading provider the Internet of Things and Digital Transformation, 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. Hitachi Data Systems, a wholly owned subsidiary of Hitachi, Ltd., offers an integrated portfolio of services and solutions that enable digital transformation through enhanced data management, governance, mobility and analytics. We help globa...
SYS-CON Events announced today that Super Micro Computer, Inc., a global leader in compute, storage and networking technologies, 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. Supermicro (NASDAQ: SMCI), the leading innovator in high-performance, high-efficiency server technology, is a premier provider of advanced server Building Block Solutions® for Data Center, Cloud Computing, Enterprise IT, Hadoop/...
Amazon has gradually rolled out parts of its IoT offerings in the last year, but these are just the tip of the iceberg. In addition to optimizing their back-end AWS offerings, Amazon is laying the ground work to be a major force in IoT – especially in the connected home and office. Amazon is extending its reach by building on its dominant Cloud IoT platform, its Dash Button strategy, recently announced Replenishment Services, the Echo/Alexa voice recognition control platform, the 6-7 strategic...
@GonzalezCarmen has been ranked the Number One Influencer and @ThingsExpo has been named the Number One Brand in the “M2M 2016: Top 100 Influencers and Brands” by Analytic. Onalytica analyzed tweets over the last 6 months mentioning the keywords M2M OR “Machine to Machine.” They then identified the top 100 most influential brands and individuals leading the discussion on Twitter.
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...
The age of Digital Disruption is evolving into the next era – Digital Cohesion, an age in which applications securely self-assemble and deliver predictive services that continuously adapt to user behavior. Information from devices, sensors and applications around us will drive services seamlessly across mobile and fixed devices/infrastructure. This evolution is happening now in software defined services and secure networking. Four key drivers – Performance, Economics, Interoperability and Trust ...
Data is an unusual currency; it is not restricted by the same transactional limitations as money or people. In fact, the more that you leverage your data across multiple business use cases, the more valuable it becomes to the organization. And the same can be said about the organization’s analytics. In his session at 19th Cloud Expo, Bill Schmarzo, CTO for the Big Data Practice at Dell EMC, introduced a methodology for capturing, enriching and sharing data (and analytics) across the organization...
SYS-CON Events announced today that T-Mobile 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. As America's Un-carrier, T-Mobile US, Inc., is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The Company's advanced nationwide 4G LTE network delivers outstanding wireless experiences to 67.4 million customers who are unwilling to compromise on ...
The explosion of new web/cloud/IoT-based applications and the data they generate are transforming our world right before our eyes. In this rush to adopt these new technologies, organizations are often ignoring fundamental questions concerning who owns the data and failing to ask for permission to conduct invasive surveillance of their customers. Organizations that are not transparent about how their systems gather data telemetry without offering shared data ownership risk product rejection, regu...
Bert Loomis was a visionary. This general session will highlight how Bert Loomis and people like him inspire us to build great things with small inventions. In their general session at 19th Cloud Expo, Harold Hannon, Architect at IBM Bluemix, and Michael O'Neill, Strategic Business Development at Nvidia, discussed the accelerating pace of AI development and how IBM Cloud and NVIDIA are partnering to bring AI capabilities to "every day," on-demand. They also reviewed two "free infrastructure" pr...
New competitors, disruptive technologies, and growing expectations are pushing every business to both adopt and deliver new digital services. This ‘Digital Transformation’ demands rapid delivery and continuous iteration of new competitive services via multiple channels, which in turn demands new service delivery techniques – including DevOps. In this power panel at @DevOpsSummit 20th Cloud Expo, moderated by DevOps Conference Co-Chair Andi Mann, panelists will examine how DevOps helps to meet th...
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place June 6-8, 2017, at the Javits Center in New York City, New York, is co-located with 20th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry p...
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.
Grape Up is a software company, specialized in cloud native application development and professional services related to Cloud Foundry PaaS. With five expert teams that operate in various sectors of the market across the USA and Europe, we work with a variety of customers from emerging startups to Fortune 1000 companies.
Financial Technology has become a topic of intense interest throughout the cloud developer and enterprise IT communities. Accordingly, attendees at the upcoming 20th Cloud Expo at the Javits Center in New York, June 6-8, 2017, will find fresh new content in a new track called FinTech.
Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more business becomes digital the more stakeholders are interested in this data including how it relates to business. Some of these people have never used a monitoring tool before. They have a question on their mind like “How is my application doing” but no id...
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 20th Cloud Expo, which will take place on June 6-8, 2017 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 add...