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Continuous Integration Authors: Elizabeth White, Mehdi Daoudi, Amit Gupta, Flint Brenton, Pat Romanski

Related Topics: Continuous Integration, Application Performance Management (APM), DevOps Journal

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The Case for DNS Redundancy | @DevOpsSummit @Catchpoint #AI #WebPerf

DNS is one of the most critical components to monitor for website performance

The Case for DNS Redundancy
By Kameerath Kareem

The Domain Name System, or DNS, provides the location/IP address of the server that hosts the domain that you are trying to access. The DNS resolution process (as explained in the image below) is the first step in the sequence of events that are triggered when you enter a domain name into your browser. If this process does not complete, the end user is left facing an error page stating, “Server Not Found/Webpage Not Available.” The user experience can be affected if DNS availability is compromised; user frustration is proven to lead to loss of revenue and brand reliability.

DNS Resolution

DNS is one of the most critical components to monitor for website performance, and is also the most vulnerable to cyber-attacks. The traditional DNS setup (in-house or a single-server deployment) makes it difficult to guarantee availability and poses a constant risk. Hackers can affect hundreds of websites by targeting a single DNS provider. Security threats to DNS providers are growing more complex and frequent – Akamai’s State of the Internet report cites a 71% increase in the frequency of Denial of Service (DDoS) attacks in Q3 2016 compared to Q3 2015, while another study by the Aberdeen Group states that 78% of organizations suffered four or more disruptions every month. There is an absolute need for solutions that can ensure resilient DNS service and mitigate the disruption caused by cyber attacks.

What is DNS redundancy?
DNS redundancy is a failsafe solution or a backup mechanism for DNS outages – outages resulting from configuration errors, infrastructure failure, or a DDoS attack. A single dedicated DNS server may not be sufficient in such scenarios; deploying multiple DNS providers in different networks ensures DNS availability, while cutting down the risk of DNS unavailability. Maintaining redundant DNS servers may not be the most cost-effective option for most enterprises, but it is one of the most effective ways to sustain DNS availability and mitigate the consequences of DDoS attacks.

How does it work?

dnsbackup

In a traditional DNS architecture, there is usually a single DNS provider delegating a set of nameservers (a set of four nameservers) for the domain. The nameserver is picked at random by each incoming DNS request; if all the nameservers are overloaded with more requests than it can serve, then this creates latency in the DNS network making the resolution process sluggish and, eventually, the DNS server is rendered unavailable for most users.

When we introduce DNS redundancy to the single-server architecture, we are expanding the choice of nameservers that are available – there are more nameservers responding to the DNS queries. In addition to this, the nameservers are distributed between separate DNS networks reducing the risk of outages and increasing reliability of the DNS provider.

screen-shot-2016-10-24-at-11-47-27-am

The image below describes a Primary-Secondary deployment; the primary server is the existing DNS solution where all of the DNS records are maintained and the secondary server will act like the Slave or back up. The primary DNS server proactively updates the zone data in the secondary server as needed, and both the primary and the secondary servers will respond to incoming DNS queries. This setup will only work if the primary DNS provider supports zone transfer.

p-s

(Source: Technical Brief: Improve Performance and Reliability with Supplemental DNS, Dyn)

The disadvantage of a primary-secondary DNS setup is that it doesn’t support advanced DNS functionality such as load balancing and traffic steering. If the primary server suffers an outage, then you will not be able to manipulate or update DNS records so this may not be the ideal solution for large enterprises that receive a lot of traffic.

Another type of DNS redundancy deployment is a primary-primary setup.

p-p

(Source: Technical Brief: Improve Performance and Reliability with Supplemental DNS, Dyn)

In this architecture, each DNS server acts as a primary server responding to DNS queries. The DNS records on each server are updated independently; this can be done using APIs or a separate custom application. Maintaining different DNS providers and keeping both in sync is a complex process, but it ensures higher availability without compromising on the advanced DNS functionalities supported by the DNS providers. So, it is important to choose DNS providers with similar functionalities and with which can work in tandem.

Choosing the right DNS service providers
When evaluating multiple DNS providers for your multi-DNS network, consider the global point of presence (PoP) of the provider along with features such as open APIs and reporting tools. You should also evaluate the performance of the DNS provider from different locations and under varying server load. The key is to deploy multiple DNS providers on separate networks that are seamlessly integrated using APIs or a custom program.

Using a global node network, a synthetic monitoring solution that offers DNS testing allows you to monitor the performance of DNS providers at any given location. The different types of DNS tests (Direct, Experience or Traversal), give a detailed report of points of failure and allows you to benchmark the performance of different service providers. Read this interesting post to gain an in-depth understanding of how you can manage DNS performance using Catchpoint.

Scalability, availability, and security are the biggest advantages of deploying DNS redundancy in your network. Using a global secondary DNS provider reduces downtime and improves end-user experience. It will help you maintain a consistent digital experience, which can translate to lower abandonment rates and better conversion rates.

The post The Case for DNS Redundancy appeared first on Catchpoint's Blog.

SYS-CON Events announced today that Catchpoint, a provider of innovative web and infrastructure monitoring solutions, has been named "Silver Sponsor" of DevOps Summit New York, which will take place on June 6-8, 2017 at the Javits Center in New York City.

Catchpoint is a leading Digital Performance Analytics company that provides unparalleled insight into customer-critical services to help consistently deliver an amazing customer experience.

"There's a growing demand from users for things to be faster. When you think about all the transactions or interactions users will have with your product and everything that is between those transactions and interactions - what drives us at Catchpoint Systems is the idea to measure that and to analyze it," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.

Designed for digital business, Catchpoint is the only end-user experience monitoring (EUM) platform that can simultaneously capture, index and analyze object level performance data inline across the most extensive monitor types and node coverage, enabling a smarter, faster way to preempt issues and optimize service delivery. More than 350 customers in over 30 countries trust Catchpoint to strengthen their brands and grow their businesses. Founded in September 2008 by former DoubleClick/Google veterans and backed by Battery Ventures, Catchpoint Systems is headquartered in New York City.

@DevOpsSummit at Cloud Expo taking place June 6-8, 2017, at Javits Center, New York City, and is co-located with the 20th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world.

DevOps at Cloud Expo / @ThingsExpo 2017 New York 
(June 6-8, 2017, Javits Center, Manhattan)

DevOps at Cloud Expo / @ThingsExpo 2017 Silicon Valley
(October 31 - November 2, 2017, Santa Clara Convention Center, CA)

Download Show Prospectus ▸ Here

The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to wait for long development cycles that produce software that is obsolete at launch. DevOps may be disruptive, but it is essential.

@DevOpsSummit 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 will benefit from unmatched branding, profile building and lead generation opportunities through:

  • Featured on-site presentation and ongoing on-demand webcast exposure to a captive audience of industry decision-makers.
  • Showcase exhibition during our new extended dedicated expo hours
  • Breakout Session Priority scheduling for Sponsors that have been guaranteed a 35-minute technical session
  • Online advertising in SYS-CON's i-Technology Publications
  • Capitalize on our Comprehensive Marketing efforts leading up to the show with print mailings, e-newsletters and extensive online media coverage.
  • Unprecedented PR Coverage: Editorial Coverage on DevOps Journal
  • Tweetup to over 75,000 plus followers
  • Press releases sent on major wire services to over 500 industry analysts.

For more information on sponsorship, exhibit, and keynote opportunities, contact Carmen Gonzalez by email at events (at) sys-con.com, or by phone 201 802-3021.

The World's Largest "Cloud Digital Transformation" Event

@CloudExpo / @ThingsExpo 2017 New York 
(June 6-8, 2017, Javits Center, Manhattan)

@CloudExpo / @ThingsExpo 2017 Silicon Valley
(Oct. 31 - Nov. 2, 2017, Santa Clara Convention Center, CA)

Full Conference Registration Gold Pass and Exhibit Hall ▸ Here

Register For @CloudExpo ▸ Here via EventBrite

Register For @ThingsExpo ▸ Here via EventBrite

Register For @DevOpsSummit ▸ Here via EventBrite

Sponsorship Opportunities

Sponsors of Cloud Expo @ThingsExpo will benefit from unmatched branding, profile building and lead generation opportunities through:

  • Featured on-site presentation and ongoing on-demand webcast exposure to a captive audience of industry decision-makers
  • Showcase exhibition during our new extended dedicated expo hours
  • Breakout Session Priority scheduling for Sponsors that have been guaranteed a 35 minute technical session
  • Online targeted advertising in SYS-CON's i-Technology Publications
  • Capitalize on our Comprehensive Marketing efforts leading up to the show with print mailings, e-newsletters and extensive online media coverage
  • Unprecedented Marketing Coverage: Editorial Coverage on ITweetup to over 100,000 plus followers, press releases sent on major wire services to over 500 industry analysts

For more information on sponsorship, exhibit, and keynote opportunities, contact Carmen Gonzalez (@GonzalezCarmen) today by email at events (at) sys-con.com, or by phone 201 802-3021.

Secrets of Sponsors and Exhibitors ▸ Here
Secrets of Cloud Expo Speakers ▸ Here

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 Cloud strategies, now is the perfect time to attend @CloudExpo@ThingsExpo, June 6-8, 2017, at the Javits Center in New York City, NY and October 31 - November 2, 2017, Santa Clara Convention Center, CA. Learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.

Track 1. FinTech
Track 2. Enterprise Cloud | Digital Transformation
Track 3. DevOps, Containers & Microservices 
Track 4. Big Data | Analytics
Track 5. Industrial IoT
Track 6. IoT Dev & Deploy | Mobility
Track 7. APIs | Cloud Security
Track 8. AI | ML | DL | Cognitive Computing

Delegates to Cloud Expo @ThingsExpo will be able to attend 8 simultaneous, information-packed education tracks.

There are over 120 breakout sessions in all, with Keynotes, General Sessions, and Power Panels adding to three days of incredibly rich presentations and content.

Join Cloud Expo @ThingsExpo conference chair Roger Strukhoff (@IoT2040), June 6-8, 2017, at the Javits Center in New York City, NY and October 31 - November 2, 2017, Santa Clara Convention Center, CA for three days of intense Enterprise Cloud and 'Digital Transformation' discussion and focus, including Big Data's indispensable role in IoT, Smart Grids and (IIoT) Industrial Internet of Things, Wearables and Consumer IoT, as well as (new) Digital Transformation in Vertical Markets.

Financial Technology - or FinTech - Is Now Part of the @CloudExpo Program!

Accordingly, attendees at the upcoming 20th Cloud Expo @ThingsExpo June 6-8, 2017, at the Javits Center in New York City, NY and October 31 - November 2, 2017, Santa Clara Convention Center, CA will find fresh new content in a new track called FinTech, which will incorporate machine learning, artificial intelligence, deep learning, and blockchain into one track.

Financial enterprises in New York City, London, Singapore, and other world financial capitals are embracing a new generation of smart, automated FinTech that eliminates many cumbersome, slow, and expensive intermediate processes from their businesses.

FinTech brings efficiency as well as the ability to deliver new services and a much improved customer experience throughout the global financial services industry. FinTech is a natural fit with cloud computing, as new services are quickly developed, deployed, and scaled on public, private, and hybrid clouds.

More than US$20 billion in venture capital is being invested in FinTech this year. @CloudExpo is pleased to bring you the latest FinTech developments as an integral part of our program, starting at the 20th International Cloud Expo June 6-8, 2017 in New York City and October 31 - November 2, 2017 in Silicon Valley.

@CloudExpo is accepting submissions for this new track, so please visit www.CloudComputingExpo.com for the latest information.

Speaking Opportunities

The upcoming 20th International @CloudExpo@ThingsExpo, June 6-8, 2017, at the Javits Center in New York City, NY and October 31 - November 2, 2017, Santa Clara Convention Center, CA announces that its Call For Papers for speaking opportunities is open.

Submit your speaking proposal today! ▸ Here

Our Top 100 Sponsors and the Leading "Digital Transformation" Companies

(ISC)2, 24Notion (Bronze Sponsor), 910Telecom, Accelertite (Gold Sponsor), Addteq, Adobe (Bronze Sponsor), Aeroybyte, Alert Logic, Anexia, AppNeta, Avere Systems, BMC Software (Silver Sponsor), Bsquare Corporation (Silver Sponsor), BZ Media (Media Sponsor), Catchpoint Systems (Silver Sponsor), CDS Global Cloud, Cemware, Chetu Inc., China Unicom, Cloud Raxak, CloudBerry (Media Sponsor), Cloudbric, Coalfire Systems, CollabNet, Inc. (Silver Sponsor), Column Technologies, Commvault (Bronze Sponsor), Connect2.me, ContentMX (Bronze Sponsor), CrowdReviews (Media Sponsor) CyberTrend (Media Sponsor), DataCenterDynamics (Media Sponsor), Delaplex, DICE (Bronze Sponsor), EastBanc Technologies, eCube Systems, Embotics, Enzu Inc., Ericsson (Gold Sponsor), FalconStor, Formation Data Systems, Fusion, Hanu Software, HGST, Inc. (Bronze Sponsor), Hitrons Solutions, IBM BlueBox, IBM Bluemix, IBM Cloud (Platinum Sponsor), IBM Cloud Data Services/Cloudant (Platinum Sponsor), IBM DevOps (Platinum Sponsor), iDevices, Industrial Internet of Things Consortium (Association Sponsor), Impinger Technologies, Interface Masters, Intel (Keynote Sponsor), Interoute (Bronze Sponsor), IQP Corporation, Isomorphic Software, Japan IoT Consortium, Kintone Corporation (Bronze Sponsor), LeaseWeb USA, LinearHub, MangoApps, MathFreeOn, Men & Mice, MobiDev, New Relic, Inc. (Bronze Sponsor), New York Times, Niagara Networks, Numerex, NVIDIA Corporation (AI Session Sponsor), Object Management Group (Association Sponsor), On The Avenue Marketing, Oracle MySQL, Peak10, Inc., Penta Security, Plasma Corporation, Pulzze Systems, Pythian (Bronze Sponsor), Cosmos, RackN, ReadyTalk (Silver Sponsor), Roma Software, Roundee.io, Secure Channels Inc., SD Times (Media Sponsor), SoftLayer (Platinum Sponsor), SoftNet Solutions, Solinea Inc., SpeedyCloud, SSLGURU LLC, StarNet, Stratoscale, Streamliner, SuperAdmins, TechTarget (Media Sponsor), TelecomReseller (Media Sponsor), Tintri (Welcome Reception Sponsor), TMCnet (Media Sponsor), Transparent Cloud Computing Consortium, Veeam, Venafi, Violin Memory, VAI Software, Zerto

About SYS-CON Media & Events
SYS-CON Media (www.sys-con.com) has since 1994 been connecting technology companies and customers through a comprehensive content stream - featuring over forty focused subject areas, from Cloud Computing to Web Security - interwoven with market-leading full-scale conferences produced by SYS-CON Events. The company's internationally recognized brands include among others Cloud Expo® (@CloudExpo), Big Data Expo® (@BigDataExpo), DevOps Summit (@DevOpsSummit), @ThingsExpo® (@ThingsExpo), Containers Expo (@ContainersExpo) and Microservices Expo (@MicroservicesE).

Cloud Expo®, Big Data Expo® and @ThingsExpo® are registered trademarks of Cloud Expo, Inc., a SYS-CON Events company.

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.