Welcome!

Linux Containers Authors: Zakia Bouachraoui, Elizabeth White, Yeshim Deniz, Liz McMillan, Pat Romanski

Related Topics: @DevOpsSummit, Java IoT, Microservices Expo, Linux Containers, Containers Expo Blog, @CloudExpo

@DevOpsSummit: Article

DNS Experience Tests | @CloudExpo @CatchPoint #APM #DevOps

When monitoring and analyzing the health of your online systems, you need a broad arsenal of different tools

DNS Experience Tests: A Key Cog in the Online Ecosystem
By Mehdi Daoudi

A company’s collection of online systems is like a delicate ecosystem – all components must integrate with and complement each other, and one single malfunction in any of them can bring the entire system to a screeching halt.

That’s why, when monitoring and analyzing the health of your online systems, you need a broad arsenal of different tools for your different needs. In addition to a wide-angle lens that provides a snapshot of the overall health of your system, you must also have precise, scalpel-like tools that can isolate and analyze all of those different components (DNS, CDNs, internal and external servers, third-party tags, etc.).

Catchpoint was designed to be that exact kind of precision tool. When evaluating the health of your systems, a simple availability test is useful, but it only a basic binary state: you’re either up or you’re down. Figuring out why you are down, or why your customers are waiting longer than they should for a page to load, is a wholly different matter, and requires precise diagnostic and analytical capabilities in order to provide you with actionable data.

Of these many different parts that make up an online system, DNS is perhaps the most important. It’s the very first interaction that a customer has with an online brand, and therefore having a rapid DNS lookup and resolution process is vital to maintaining an exceptional customer experience. Yet to properly assess your DNS health, you need that aforementioned scalpel, not a broad sword. This is why Catchpoint has maintained close relationships with DNS solution providers such as NS1, keeping open channels of communication in order to create the most precise tools possible.

This type of relationship has manifested itself positively for NS1, which uses Catchpoint tests to ensure that they are providing their customers with the best possible DNS resolution times, but it’s equally important for clients of those providers to monitor their own DNS performance to detect any issues that the vendor might be missing.

One way to drill down and gain additional insight into a DNS performance issue is through the different types of DNS monitors that Catchpoint offers. To play out a scenario, let’s say that you catch a DNS resolution problem in a basic browser test:

Chrome test

While this data shows that your users are suffering from bad experience due to DNS latency, you have no way of knowing where the latency occurred in the DNS resolution process. To gain this information, you need a DNS monitoring solution that shows performance and error data for all the different steps and servers in the DNS chain. Additionally, you can keep an eye on specific types of records (Answers, Authoritative Name Servers, or Additional Records) from the DNS query, which allows you to detect issues such as wrong TTLs, DNS Cache Poisoning, misconfigurations, etc.

This is imperative when it comes to detecting a third party DNS vendor’s errors, because most organizations rely on external DNS registrars and vendors, but have little visibility in their performance and availability.

8-3 blog image-2_705_left[1]

Getting back to our hypothetical problem, once we run our DNS Experience tests, we get a result that looks like this:

DNS Experience Test

In this test, which hits a multitude of different name servers in succession, we see intermittent spikes in performance (blue line chart) and drops in availability (green line chart), which tells us that the problem is isolated to specific name servers as opposed to the whole lot of them. Therefore, we need to run DNS Direct tests to isolate each of those name servers:

dnsDirect

Now the exact source of the problem becomes clear. There’s one specific name server which has failed multiple times in the test timeframe, which means that we now have actionable data to work with. The DNS provider, if it hasn’t already located the source of the problem through the same process, can be made aware of the issue so that they can take that server offline while they fix the problem.

In addition to the advanced insight that specific monitors provide, one of Catchpoint’s strongest attributes is our global node coverage. As a global DNS provider, NS1 knows that the ability to test their servers from as many different locations as possible is imperative to understanding the full scope of end users’ DNS experience. NS1 uses Catchpoint nodes around the world to collect data, and then using Catchpoint’s Push/Pull APIs, they can input that data into any number of different tools in order to make it actionable.

Just like the ecosystem of different components that make up modern online systems, there is an ecosystem of tools of similar size and scope to keep an eye on all of those components. Catchpoint is a cog in that ecosystem; this is why it was designed to play nicely with other alerting, communication, and monitoring tools that IT Ops professionals regularly use. There are Catchpoint integrations in place with Slack, VictorOps, PagerDuty, Zapier, etc., and the APIs work with many other different tools, including (as NS1 themselves wrote about) OpenTDSB, an open source time series database.

The importance of getting precise, actionable data cannot be overstated when looking at the overall importance of digital performance analytics. By getting the most out of all the tools available to you and making sure that they complement and work well with each other can make all the difference in the health of your online systems.

The post DNS Experience Tests: A Key Cog in the Online Ecosystem appeared first on Catchpoint's Blog.

More Stories By Mehdi Daoudi

Catchpoint radically transforms the way businesses manage, monitor, and test the performance of online applications. Truly understand and improve user experience with clear visibility into complex, distributed online systems.

Founded in 2008 by four DoubleClick / Google executives with a passion for speed, reliability and overall better online experiences, Catchpoint has now become the most innovative provider of web performance testing and monitoring solutions. We are a team with expertise in designing, building, operating, scaling and monitoring highly transactional Internet services used by thousands of companies and impacting the experience of millions of users. Catchpoint is funded by top-tier venture capital firm, Battery Ventures, which has invested in category leaders such as Akamai, Omniture (Adobe Systems), Optimizely, Tealium, BazaarVoice, Marketo and many more.

IoT & Smart Cities Stories
René Bostic is the Technical VP of the IBM Cloud Unit in North America. Enjoying her career with IBM during the modern millennial technological era, she is an expert in cloud computing, DevOps and emerging cloud technologies such as Blockchain. Her strengths and core competencies include a proven record of accomplishments in consensus building at all levels to assess, plan, and implement enterprise and cloud computing solutions. René is a member of the Society of Women Engineers (SWE) and a m...
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 settlement products to hedge funds and investment banks. After, he co-founded a revenue cycle management company where he learned about Bitcoin and eventually Ethereal. Andrew's role at ConsenSys Enterprise is a mul...
In his general session at 19th Cloud Expo, Manish Dixit, VP of Product and Engineering at Dice, discussed how Dice leverages data insights and tools to help both tech professionals and recruiters better understand how skills relate to each other and which skills are in high demand using interactive visualizations and salary indicator tools to maximize earning potential. Manish Dixit is VP of Product and Engineering at Dice. As the leader of the Product, Engineering and Data Sciences team at D...
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. 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 busine...
Nicolas Fierro is CEO of MIMIR Blockchain Solutions. He is a programmer, technologist, and operations dev who has worked with Ethereum and blockchain since 2014. His knowledge in blockchain dates to when he performed dev ops services to the Ethereum Foundation as one the privileged few developers to work with the original core team in Switzerland.
Whenever a new technology hits the high points of hype, everyone starts talking about it like it will solve all their business problems. Blockchain is one of those technologies. According to Gartner's latest report on the hype cycle of emerging technologies, blockchain has just passed the peak of their hype cycle curve. If you read the news articles about it, one would think it has taken over the technology world. No disruptive technology is without its challenges and potential impediments t...
If a machine can invent, does this mean the end of the patent system as we know it? The patent system, both in the US and Europe, allows companies to protect their inventions and helps foster innovation. However, Artificial Intelligence (AI) could be set to disrupt the patent system as we know it. This talk will examine how AI may change the patent landscape in the years to come. Furthermore, ways in which companies can best protect their AI related inventions will be examined from both a US and...
Bill Schmarzo, Tech Chair of "Big Data | Analytics" of upcoming CloudEXPO | DXWorldEXPO New York (November 12-13, 2018, New York City) today announced the outline and schedule of the track. "The track has been designed in experience/degree order," said Schmarzo. "So, that folks who attend the entire track can leave the conference with some of the skills necessary to get their work done when they get back to their offices. It actually ties back to some work that I'm doing at the University of San...
When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things'). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing. IoT is not about the devices, its about the data consumed and generated. The devices are tools, mechanisms, conduits. This paper discusses the considerations when dealing with the...
Bill Schmarzo, author of "Big Data: Understanding How Data Powers Big Business" and "Big Data MBA: Driving Business Strategies with Data Science," is responsible for setting the strategy and defining the Big Data service offerings and capabilities for EMC Global Services Big Data Practice. As the CTO for the Big Data Practice, he is responsible for working with organizations to help them identify where and how to start their big data journeys. He's written several white papers, is an avid blogge...