Welcome!

@DevOpsSummit Authors: Yeshim Deniz, Zakia Bouachraoui, Pat Romanski, Liz McMillan, Elizabeth White

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

@DevOpsSummit: Blog Feed Post

Monitoring DNS Load Balancers | @DevOpsSummit @Catchpoint #DevOps #WebPerf

How can you identify which DNS Load Balancing solution works for you?

If your website receives heavy traffic and you are hosted across multiple infrastructures across the world or you are using multiple CDNs, then you ought to use a DNS Load Balancer to reroute traffic for better performance.

While there are some large companies who create their own DNS load balancing system, which is complex and tedious to implement and manage, some companies make life easier by opting for ready-made solutions such as those from Cedexis, Dyn, NSONE, Rage4, etc.

Most of the above mentioned companies are backed by Anycast networks spread across global locations.

While there are some differences between the feature sets offered by these companies and the number of POPs they own, it is very important to identify the one that works best for your business.

How can you identify which DNS Load Balancing solution works for you?

You may have already realized by now that at Catchpoint we strongly recommend our customers and prospects have a strategy around DNS. The first step of that strategy is to create benchmark tests to compare the performance of each of these companies by monitoring their DNS servers.

Catchpoint has a global presence spread across 100+ locations with hundreds of backbone & last mile nodes which can help you measure the performance of each of these DNS load balancers.

How can you test?

Use our Direct DNS monitoring which allows you to monitor the DNS servers of different companies from across the globe:

DNS-load-balancing-1_705

The above testing methodology allows you to compare apples to apples and choose the best vendor that works for your business.

But wait, it doesn’t end at choosing the right solution.

You should be monitoring it 24/7 to ensure you provide a seamless experience for your end users.

While most DNS load balancers use Anycast, if there is a failure the user doesn’t really notice the failure as they automatically get rerouted to a working DNS server. But the user does have to wait longer, in many cases much longer, for the page to load so this process of rerouting does have a significant effect on the end users’ experience.

Here is an example:

The performance of the website takes a significant hit in a specific location:

DNS-load-balancing-3_705

When we dig deeper, we notice that the issue was related to poor DNS Resolution. As explained above while we don’t see many failures, the overall performance of the page—it took up to 13 seconds to load for some users—was impacted by high DNS resolution time:

DNS-load-balancing-4_705

With the help of our Web tests, we identified the root cause to be the DNS. Now the only question is, which DNS server? So, we monitored the different DNS servers using our DNS tests and voilà!

DNS-load-balancing-2_705

The graph on the right shows the specific DNS server which is failing across multiple ISPs. In the above scenario it was this specific DNS server, but the next time – who knows?

And this is why a DNS Monitoring Strategy is essential as you continue to make your way on the performance journey.

The post Monitoring DNS Load Balancers appeared first on Catchpoint's Blog.

Read the original blog entry...

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.

@DevOpsSummit Stories
Dion Hinchcliffe is an internationally recognized digital expert, bestselling book author, frequent keynote speaker, analyst, futurist, and transformation expert based in Washington, DC. He is currently Chief Strategy Officer at the industry-leading digital strategy and online community solutions firm, 7Summits.
Addteq is a leader in providing business solutions to Enterprise clients. Addteq has been in the business for more than 10 years. Through the use of DevOps automation, Addteq strives on creating innovative solutions to solve business processes. Clients depend on Addteq to modernize the software delivery process by providing Atlassian solutions, create custom add-ons, conduct training, offer hosting, perform DevOps services, and provide overall support services.
Contino is a global technical consultancy that helps highly-regulated enterprises transform faster, modernizing their way of working through DevOps and cloud computing. They focus on building capability and assisting our clients to in-source strategic technology capability so they get to market quickly and build their own innovation engine.
The standardization of container runtimes and images has sparked the creation of an almost overwhelming number of new open source projects that build on and otherwise work with these specifications. Of course, there's Kubernetes, which orchestrates and manages collections of containers. It was one of the first and best-known examples of projects that make containers truly useful for production use. However, more recently, the container ecosystem has truly exploded. A service mesh like Istio addresses many of the challenges faced by developers and operators as monolithic applications transition towards a distributed microservice architecture. A tracing tool like Jaeger analyzes what's happening as a transaction moves through a distributed system. Monitoring software like Prometheus captures time-series events for real-time alerting and other uses. Grafeas and Kritis provide security polic...
DevOpsSUMMIT at CloudEXPO will expand the DevOps community, enable a wide sharing of knowledge, and educate delegates and technology providers alike. Recent research has shown that DevOps dramatically reduces development time, the amount of enterprise IT professionals put out fires, and support time generally. Time spent on infrastructure development is significantly increased, and DevOps practitioners report more software releases and higher quality. Sponsors of DevOpsSUMMIT at CloudEXPO will benefit from unmatched branding, profile building and lead generation opportunities.