|By Tim Hinds||
|February 1, 2014 01:00 PM EST||
Agile software development isn't really a "new" trend anymore. I mean, the Agile Manifesto turns 13 years old next month and while that might be early adolescence in human years, it's downright ancient as far as trends in IT are concerned. However, one area that has yet to fully mature is the implementation of non-functional testing practices in a Continuous Testing sort of way that can keep pace with more Agile development teams. Load and performance testing definitely fall into that category. You might be a performance tester on a team that is just starting to do more iterative development or a more experienced Agile tester looking to add load and performance testing to your workflow; either way, you'll likely want to know what you're in for.
Agile development practices can help teams achieve faster time to market, adapt to changing requirements, provide a constant feedback loop, etc. The benefits of load and performance testing include determining how much load an application can handle before it crashes in production, when to add another server, when to reconfigure the network, where code needs to be optimized, etc. What is less well known is the fact that the combination of the two practices can lead to additional benefits that go beyond just the sum of the benefits of each practice, i.e. 1+1=3.
Some of these benefits include:
Avoiding Late Performance Problem Discovery
When load and performance testing are pushed off until the end of a development cycle, there is often little to no time for developers to make changes. This can cause teams to push back release dates and delay getting features out the door that customers need. Alternatively, if the issues are minor, teams may decide to proceed and launch the application into production while accepting the heightened risks. If the performance problems are more fundamental, they could even require painful architectural changes that could take weeks or months to implement.
Making Changes Earlier When They Are Cheaper
By including load and performance testing in Continuous Integration testing processes, organizations can catch performance issues early before they get much more costly to fix. Developers can instantly know that the new feature in the latest build has caused the application to no longer meet Service Level Agreements (SLAs). They can fix the problem then and there before it becomes exponentially more expensive. This is especially true on Agile teams when discovering a performance problem weeks later could mean that it actually occurred several builds ago which makes the task of pinpointing the root cause a nightmare.
Guaranteeing Users Get New Features, Not New Performance Issues
In some Agile organizations, changes are happening incredibly fast. It's possible for a new feature or some new functionality to get checked into source control, run through a Continuous Integration build, pass all of the automated tests, and get deployed to the production server in a matter of minutes. But if that code wasn't optimized to handle the number of simultaneous users seen at the worst peak times, it could cause the whole system to crash. Integrating load testing into the process before these changes are deployed to production can ensure that your users get all the goodies they want without the bad user experiences. This can save your company thousand or even millions in lost revenue from users switching to competitors' apps or bashing your brand because of the problems they experienced with your app.
In the same way that combining Agile with load testing can provide unique benefits, it can also present your teams with unique challenges they may not have experienced in the past.
Shorter Development Cycles Require More Tests in Less Time
Load and performance testing are usually pushed off until the end of a development cycle. With Agile, development, cycles are much shorter, and load & performance testing can get pushed off until the last day of a sprint or sometimes it's done every other sprint. This can often result in code being released without being adequately tested or user stories slipping to the next release once they have been tested. Conceptually the solution is to do the testing earlier in the development cycle, but that's easier said than done with many teams lacking the resources and tools to make it happen.
"Working" Code Does Not Always Perform Well
So much focus for developers on Agile teams is put on delivering "working" code, but is code really "working" if it fails when the application is under load? Should user stories and tasks really be marked as "done" if the code associated with them causes the application to crash with 100 users? What about 1,000? 100,000? The pressure to get code out the door is high, but so is the cost of having an application crash in production.
Developers Need Feedback NOW
Agile developers need to know more than just the fact that their code is causing performance issues: they need to know when their code started causing problems and what story they were working on when the issue started. It's a huge pain for developers to be forced to go back and fix code for a story they worked on weeks or months ago. It also means they can't spend time working on getting new features out the door. Detecting performance issues early in the cycle so you can deliver important feedback to developers quickly is crucial to saving costs.
Automating the Handoff from Dev to Ops Can Feel Risky
While DevOps and Continuous Deployment are still fairly young practices, the fear felt by operations teams that new changes in code will slow down or even crash the application when it is deployed in production has been around forever. Automating some of the testing in the Continuous Integration process can help to ease some of this fear, but without adequate performance testing included, the risk is still real. Ops teams know well the huge impact application downtime can have on the business.
As daunting as some of these challenges seem, don't lose sight of the benefits you'll receive. Load and performance testing successfully in an Agile way can save an organization a lot in costly bug fixes and could make a tester a hero to both development and operations teams alike.
Not quite sure how to get started? Stay tuned for my next blog on best practices for Agile load and performance testing.
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.
May. 27, 2015 07:30 AM EDT Reads: 5,473
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...
May. 27, 2015 04:30 AM EDT Reads: 3,952
How do APIs and IoT relate? The answer is not as simple as merely adding an API on top of a dumb device, but rather about understanding the architectural patterns for implementing an IoT fabric. There are typically two or three trends: Exposing the device to a management framework Exposing that management framework to a business centric logic Exposing that business layer and data to end users. This last trend is the IoT stack, which involves a new shift in the separation of what stuff happens, where data lives and where the interface lies. For instance, it's a mix of architectural styles ...
May. 27, 2015 03:00 AM EDT Reads: 5,715
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...
May. 27, 2015 02:30 AM EDT Reads: 5,329
Connected devices and the Internet of Things are getting significant momentum in 2014. In his session at Internet of @ThingsExpo, Jim Hunter, Chief Scientist & Technology Evangelist at Greenwave Systems, examined three key elements that together will drive mass adoption of the IoT before the end of 2015. The first element is the recent advent of robust open source protocols (like AllJoyn and WebRTC) that facilitate M2M communication. The second is broad availability of flexible, cost-effective storage designed to handle the massive surge in back-end data in a world where timely analytics is e...
May. 27, 2015 02:00 AM EDT Reads: 6,108
Collecting data in the field and configuring multitudes of unique devices is a time-consuming, labor-intensive process that can stretch IT resources. Horan & Bird [H&B], Australia’s fifth-largest Solar Panel Installer, wanted to automate sensor data collection and monitoring from its solar panels and integrate the data with its business and marketing systems. After data was collected and structured, two major areas needed to be addressed: improving developer workflows and extending access to a business application to multiple users (multi-tenancy). Docker, a container technology, was used to ...
May. 27, 2015 01:00 AM EDT Reads: 1,897
The true value of the Internet of Things (IoT) lies not just in the data, but through the services that protect the data, perform the analysis and present findings in a usable way. With many IoT elements rooted in traditional IT components, Big Data and IoT isn’t just a play for enterprise. In fact, the IoT presents SMBs with the prospect of launching entirely new activities and exploring innovative areas. CompTIA research identifies several areas where IoT is expected to have the greatest impact.
May. 26, 2015 09:00 PM EDT Reads: 4,842
The 4th International Internet of @ThingsExpo, co-located with the 17th International Cloud Expo - to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA - announces that its Call for Papers is open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
May. 26, 2015 06:00 PM EDT Reads: 1,597
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.
May. 26, 2015 05:00 PM EDT Reads: 4,746
The Internet of Things is tied together with a thin strand that is known as time. Coincidentally, at the core of nearly all data analytics is a timestamp. When working with time series data there are a few core principles that everyone should consider, especially across datasets where time is the common boundary. In his session at Internet of @ThingsExpo, Jim Scott, Director of Enterprise Strategy & Architecture at MapR Technologies, discussed single-value, geo-spatial, and log time series data. By focusing on enterprise applications and the data center, he will use OpenTSDB as an example t...
May. 26, 2015 02:00 PM EDT Reads: 6,375
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will addresses this very serious issue of profound change in the industry.
May. 26, 2015 01:15 PM EDT Reads: 744
Scott Jenson leads a project called The Physical Web within the Chrome team at Google. Project members are working to take the scalability and openness of the web and use it to talk to the exponentially exploding range of smart devices. Nearly every company today working on the IoT comes up with the same basic solution: use my server and you'll be fine. But if we really believe there will be trillions of these devices, that just can't scale. We need a system that is open a scalable and by using the URL as a basic building block, we open this up and get the same resilience that the web enjoys.
May. 26, 2015 01:00 PM EDT Reads: 6,866
We are reaching the end of the beginning with WebRTC, and real systems using this technology have begun to appear. One challenge that faces every WebRTC deployment (in some form or another) is identity management. For example, if you have an existing service – possibly built on a variety of different PaaS/SaaS offerings – and you want to add real-time communications you are faced with a challenge relating to user management, authentication, authorization, and validation. Service providers will want to use their existing identities, but these will have credentials already that are (hopefully) i...
May. 26, 2015 01:00 PM EDT Reads: 4,217
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, June 9-11, 2015, at the Javits Center in New York City. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be
May. 26, 2015 12:15 PM EDT Reads: 1,967
Container frameworks, such as Docker, provide a variety of benefits, including density of deployment across infrastructure, convenience for application developers to push updates with low operational hand-holding, and a fairly well-defined deployment workflow that can be orchestrated. Container frameworks also enable a DevOps approach to application development by cleanly separating concerns between operations and development teams. But running multi-container, multi-server apps with containers is very hard. You have to learn five new and different technologies and best practices (libswarm, sy...
May. 26, 2015 12:00 PM EDT Reads: 1,867
SYS-CON Events announced today that DragonGlass, an enterprise search platform, 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. After eleven years of designing and building custom applications, OpenCrowd has launched DragonGlass, a cloud-based platform that enables the development of search-based applications. These are a new breed of applications that utilize a search index as their backbone for data retrieval. They can easily adapt to new data sets and provide access to both structured and unstruc...
May. 26, 2015 12:00 PM EDT Reads: 1,804
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...
May. 26, 2015 11:00 AM EDT Reads: 3,938
An entirely new security model is needed for the Internet of Things, or is it? Can we save some old and tested controls for this new and different environment? In his session at @ThingsExpo, New York's at the Javits Center, Davi Ottenheimer, EMC Senior Director of Trust, reviewed hands-on lessons with IoT devices and reveal a new risk balance you might not expect. Davi Ottenheimer, EMC Senior Director of Trust, has more than nineteen years' experience managing global security operations and assessments, including a decade of leading incident response and digital forensics. He is co-author of t...
May. 26, 2015 11:00 AM EDT Reads: 5,632
SYS-CON Events announced today that MetraTech, now part of Ericsson, has been named “Silver Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. Ericsson is the driving force behind the Networked Society- a world leader in communications infrastructure, software and services. Some 40% of the world’s mobile traffic runs through networks Ericsson has supplied, serving more than 2.5 billion subscribers.
May. 26, 2015 10:15 AM EDT Reads: 1,156
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...
May. 26, 2015 10:00 AM EDT Reads: 3,069