Welcome!

Industrial IoT Authors: Pat Romanski, Kevin Benedict, Liz McMillan, Elizabeth White, Scott Allen

Related Topics: Microservices Expo, Java IoT, Industrial IoT, Microsoft Cloud, IoT User Interface, Release Management

Microservices Expo: Article

GUI Versus Script: Is This Old Load Testing Debate Now Over?

New breed of hybrid load testing solutions

The first step in performance or load testing a web application is to create a realistic test script. This script, representing a specific type of end user, contains steps that are fully automated transactions flows. Often, complex behaviors need to be emulated as part of these flows. To incorporate the needed behavior or to handle complex scenarios, testers need to customize these load scripts. The question is whether you utilize a tool that takes a GUI driven approach for script customization/manipulation, or whether you choose a tool which requires the use of a programming language.

As Performance testers, we typically evaluate several load testing tools before diving into a project. Some of us prefer the GUI driven approach to creating load scripts because, being results driven, we want to get the test up and running as quickly as possible. The GUI approach saves us time and there is no programming involved thus the learning curve is also extremely fast. These GUI scripts are typically easily modified by having their parameters and values organized in a visually obvious format. And just because a tool is easy to use, doesn't mean that it's only for beginners. Remember the good old days of MS-DOS? Eeek, thank goodness for GUI driven DOS (Windows).

Some testers (mistakenly) dismiss the GUI driven approach as being too limited for complicated behaviors. Old school testers insist on only utilizing program-based scripts because past experience has led them to think that this is the most flexible or the only choice for handling complicated behaviors. All too often, the perception is that GUI driven scripts limit the level of customizations possible to emulate a real user. This opinion is likely based on experiences with rudimentary GUI tools on the market that are too basic and limited in their capabilities such as handling dynamic content and varying the transactions flows.

However, there is a new breed in load testing solutions, designed and built to handle the most complex advanced scenarios. These are true enterprise-class solutions which provide a hybrid approach by containing both GUI and programming features. The power behind this hybrid approach enables the user to emulate even the most complex behavior but it also includes time saving features which can only be offered by a GUI solution.

Let's get really technical for a minute to highlight an example: Some tools provide the common "programming" tools like loops and conditions. Recorded values of parameters are easily replaced by variables with a click of the mouse. NeoLoad, an example of a modern enterprise solution, goes further to provide even more advanced features. Some specific examples include: 1) "Wait Until" Action to the current execution thread until certain conditions have been verified 2) "Shared Queue" Action to use values from one VU's response as input in an entirely different VU execution 3) a "While" Action allows various transactions, such as web pages, to be iterated while a condition remains false 4) "Try ...Catch" Action to break out of the script based on Validation or Assertions and go to the End phase. The use of nested actions creates even more complex behaviors. All of these advanced scenarios are accomplished without programming! PUSHtechnology which is rapidly being deployed in today's RIA's adds even more complexity. With asynchronous updates pushed to/from the page independent of complete page refreshes...imagine this programming nightmare! NeoLoad has a way to solve this problem using cutting edge technology that can "listen" for PUSH behavior (all polling or streaming requests) and wrap all these asynchronous requests into a GUI fork Action, even calculating the average time interval between execution, then presents you with a newly modified script to emulate these load pattern characteristics. Again, all of these GUI centric features allow further manipulation without the need for programming.

Admittedly, there are rare occasions which call for programming and the new breed solution has a Javascript Action with a complete API to give it a "hybrid" of GUI and coding capability. Again, simply drag the Javascript action into the place where you want it executed and add the java or javascript required. Accomplish things like computation of variables, logging values to files, manipulating cookies, etc.. Incorporating the javascript feature allows for unlimited flexibility in scripting.
As the script becomes more complicated, it's nice to have this hierarchical GUI-type view.

New breed solutions not only allow for complex behaviors...the GUI approach has other time saving embedded assets. To handle dynamic parameters, NeoLoad is delivered with an ever evolving list of known architectural framework dynamic parameters which are automatically detected and handled by a wizard. The search and replace feature finds strings embedded in any request (body, header, URL's, XML tree, partial matches, etc.) and replaces or concatenates to the string with any data or variable - choose to replace entire string or just part of the string. There's an automatic extraction feature to take data from any response and use it to populate the value of a variable. You can enable/disable specific transactions at a page level or embedded request level which a click of the mouse to isolate transactions of interest. Target an entirely different QA/Performance/Production environment - change the Servers field from host where you initially made the recording to the new server name and port. Debug scripts easily using the side-by-side comparison feature with a tab isolating only the differences of recorded vs. replayed values.

From this perspective, the great debate over choosing a GUI driven or programming approach is over...eliminate the tradeoffs and choose a hybrid which has a powerful GUI and also extends the flexibility for programming. Skip most of the manual programming and only use coding where it's required. Both experts and beginners can agree there is now a solution which meets all of the load & performance testing challenges of your own unique web application. Introducing the "GUI hybrid".

More Stories By Rebecca Clinard

Rebecca Clinard is a Senior Performance Engineer at Neotys, a provider of load testing software for Web applications. Previously, she worked as a web application performance engineer for Bowstreet, Fidelity Investments, Bottomline Technologies and Timberland companies, industries spanning retail, financial services, insurance and manufacturing. Her expertise lies in creating realistic load tests and performance tuning multi-tier deployments. She has been orchestrating and conducting performance tests since 2001. Clinard graduated from University of New Hampshire with a BS and also holds a UNIX Certificate from Worcester Polytechnic Institute.

@ThingsExpo Stories
Complete Internet of Things (IoT) embedded device security is not just about the device but involves the entire product’s identity, data and control integrity, and services traversing the cloud. A device can no longer be looked at as an island; it is a part of a system. In fact, given the cross-domain interactions enabled by IoT it could be a part of many systems. Also, depending on where the device is deployed, for example, in the office building versus a factory floor or oil field, security ha...
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management solutions, helping companies worldwide activate their data to drive more value and business insight and to transform moder...
The many IoT deployments around the world are busy integrating smart devices and sensors into their enterprise IT infrastructures. Yet all of this technology – and there are an amazing number of choices – is of no use without the software to gather, communicate, and analyze the new data flows. Without software, there is no IT. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will look at the protocols that communicate data and the emerging data analy...
Digital innovation is the next big wave of business transformation based on digital technologies of which IoT and Big Data are key components, For example: Business boundary innovation is a challenge to excavate third-party business value using IoT and BigData, like Nest Business structure innovation may propose re-building business structure from scratch, as Uber does in the taxicab industry The social model innovation is also a big challenge to the new social architecture with the design fr...
Fifty billion connected devices and still no winning protocols standards. HTTP, WebSockets, MQTT, and CoAP seem to be leading in the IoT protocol race at the moment but many more protocols are getting introduced on a regular basis. Each protocol has its pros and cons depending on the nature of the communications. Does there really need to be only one protocol to rule them all? Of course not. In his session at @ThingsExpo, Chris Matthieu, co-founder and CTO of Octoblu, walk you through how Oct...
Is your aging software platform suffering from technical debt while the market changes and demands new solutions at a faster clip? It’s a bold move, but you might consider walking away from your core platform and starting fresh. ReadyTalk did exactly that. In his General Session at 19th Cloud Expo, Michael Chambliss, Head of Engineering at ReadyTalk, will discuss why and how ReadyTalk diverted from healthy revenue and over a decade of audio conferencing product development to start an innovati...
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 EMC, will introduce a methodology for capturing, enriching and sharing data (and analytics) across the organizati...
IoT is fundamentally transforming the auto industry, turning the vehicle into a hub for connected services, including safety, infotainment and usage-based insurance. Auto manufacturers – and businesses across all verticals – have built an entire ecosystem around the Connected Car, creating new customer touch points and revenue streams. In his session at @ThingsExpo, Macario Namie, Head of IoT Strategy at Cisco Jasper, will share real-world examples of how IoT transforms the car from a static p...
There is little doubt that Big Data solutions will have an increasing role in the Enterprise IT mainstream over time. Big Data at Cloud Expo - to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA - has announced its Call for Papers is open. Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is...
If you had a chance to enter on the ground level of the largest e-commerce market in the world – would you? China is the world’s most populated country with the second largest economy and the world’s fastest growing market. It is estimated that by 2018 the Chinese market will be reaching over $30 billion in gaming revenue alone. Admittedly for a foreign company, doing business in China can be challenging. Often changing laws, administrative regulations and the often inscrutable Chinese Interne...
SYS-CON Events has announced today that Roger Strukhoff has been named conference chair of Cloud Expo and @ThingsExpo 2016 Silicon Valley. The 19th Cloud Expo and 6th @ThingsExpo will take place on November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. "The Internet of Things brings trillions of dollars of opportunity to developers and enterprise IT, no matter how you measure it," stated Roger Strukhoff. "More importantly, it leverages the power of devices and the Interne...
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo Silicon Valley Call for Papers is now open.
SYS-CON Events announced today that China Unicom will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. China United Network Communications Group Co. Ltd ("China Unicom") was officially established in 2009 on the basis of the merger of former China Netcom and former China Unicom. China Unicom mainly operates a full range of telecommunications services including mobile broadband (GSM, WCDMA, LTE F...
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Video experiences should be unique and exciting! But that doesn’t mean you need to patch all the pieces yourself. Users demand rich and engaging experiences and new ways to connect with you. But creating robust video applications at scale can be complicated, time-consuming and expensive. In his session at @ThingsExpo, Zohar Babin, Vice President of Platform, Ecosystem and Community at Kaltura, will discuss how VPaaS enables you to move fast, creating scalable video experiences that reach your...
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life sett...
In his general session at 18th Cloud Expo, Lee Atchison, Principal Cloud Architect and Advocate at New Relic, discussed cloud as a ‘better data center’ and how it adds new capacity (faster) and improves application availability (redundancy). The cloud is a ‘Dynamic Tool for Dynamic Apps’ and resource allocation is an integral part of your application architecture, so use only the resources you need and allocate /de-allocate resources on the fly.
“We're a global managed hosting provider. Our core customer set is a U.S.-based customer that is looking to go global,” explained Adam Rogers, Managing Director at ANEXIA, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
The vision of a connected smart home is becoming reality with the application of integrated wireless technologies in devices and appliances. The use of standardized and TCP/IP networked wireless technologies in line-powered and battery operated sensors and controls has led to the adoption of radios in the 2.4GHz band, including Wi-Fi, BT/BLE and 802.15.4 applied ZigBee and Thread. This is driving the need for robust wireless coexistence for multiple radios to ensure throughput performance and th...