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Managed dns webinar 2015 internap

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Managed dns webinar 2015 internap

  1. 1. DNS: An Overlooked Source of Latency March 26, 2015
  2. 2. Meet the Presenters 2 Drew McBath Internap Senior Director, Product & Strategic Marketing Ben Whitaker Internap Sr. Software Architect #INAPDNS
  3. 3. Goals 3 1. Understand what DNS is and how it works. 2. Cover the factors that affect webpage load times. 3. Identify important DNS features and their functions. 4. Learn some ways DNS can impact your business. 5. Segment the different types of DNS solutions available. 6. Become a more informed buyer! #INAPDNS
  4. 4. What is DNS? 4 DNS (Domain Name System) maintains a catalog of domain names, such as “internap.com”, and resolves them into IP addresses. Therefore anyone that has a presence online uses DNS. In other words, DNS is needed for any user to find and connect to any website. INTERNAP.COM 243.64.13.101 #INAPDNS
  5. 5. How does DNS work? 5 Top Level DNS Server Local DNS Resolver Internap.com Authoritative Name Server I want to go to www.internap.com Not in my cache #INAPDNS
  6. 6. How does DNS work? 6 Top Level DNS Server Local DNS Resolver Internap.com Authoritative Name Server Authoritative Name Server for internap.com is at 243.64.13.8 #INAPDNS
  7. 7. How does DNS work? 7 Top Level DNS Server Local DNS Resolver Internap.com Authoritative Name Server www.internap.com is at 243.64.13.101 #INAPDNS
  8. 8. How does DNS work? 8 Top Level DNS Server Local DNS Resolver Internap.com Authoritative Name Server www.internap.com is at 243.64.13.101 #INAPDNS
  9. 9. How does DNS work? 9 Top Level DNS Server Local DNS Resolver Internap.com Authoritative Name Server www.internap.com is at 243.64.13.101 243.64.13.101 #INAPDNS
  10. 10. Important factors that impact page load times: • Initial connections • DNS lookups • SSL handshakes • Waiting to receive data from server • Receiving/sending data to/from the server DNS lookups are critical because they can make up a large percentage of page load times. What affects website load times? 10 #INAPDNS
  11. 11. What affects website load times? 11 Tested at http://tools.pingdom.com/fpt/ Category % of Load time Actual Time (s) Wait 34.16% 0.953 Receive 32.30% 0.901 DNS 16.56% 0.462 Connect 16.98% 0.474 SSL 0% 0.000 Send 0% 0.000 www.uga.edu Total load time: 2.79s www.uga.edu Waterfall View #INAPDNS
  12. 12. What affects website load times? 12 www.engagdet.com Waterfall View Tested at http://tools.pingdom.com/fpt/ Category % of Load time Actual Time (s) Wait 52.76% 1.894 Receive 10.06% 0.361 DNS 17.34% 0.623 Connect 16.93% 0.608 SSL 2.86% 0.103 Send 0.05% 0.002 www.engadget.com Total load time: 3.59s #INAPDNS
  13. 13. Managed DNS Features - Anycast 13 DNS Server DNS Server I want to go to www.internap.comDNS Server DNS Server #INAPDNS Internap.com
  14. 14. Managed DNS Features - Anycast 14 DNS Server DNS Server I want to go to www.internap.comDNS Server Closest name server* DNS Server www.internap.com is at 243.64.13.101 *Based on AS path length #INAPDNS Internap.com
  15. 15. Managed DNS Features - Anycast 15 DNS Server DNS Server I want to go to www.internap.comDNS Server Closest name server* DNS Server www.internap.com is at 243.64.13.101 *Based on AS path length #INAPDNS Internap.com 243.64.13.101
  16. 16. Managed DNS Features – Active Failover 16 DNS Server Internap.com (primary)I want to go to www.internap.com www.internap.com is at 243.64.13.101 Internap.com (secondary) Health monitoring 243.64.13.101 #INAPDNS
  17. 17. Managed DNS Features – Active Failover 17 DNS Server Internap.com (primary) www.internap.com is at 243.64.13.101 Internap.com (secondary) 243.64.13.101 ! Health monitoring #INAPDNS
  18. 18. Managed DNS Features – Active Failover 18 DNS Server Internap.com (primary) Internap.com (secondary) Health monitoring www.internap.com is at 106.19.26.102 #INAPDNS
  19. 19. Scenario: A growing e-commerce site has been handling their DNS needs through their ISP since inception. Recently they expanded to the EU and noticed that users were experiencing unacceptable latency while connecting to their site. Furthermore, last month, users were unable to reach the ecommerce site for up to 10 minutes. Impact: Lost Revenue Customer Frustration Causes: DNS name servers not geographically close to a large percentage of users. Routing table errors were misdirecting requests to far afield name servers. Network congestion contributed to slow resolution of DNS queries. A hardware failure occurred at one of the name server nodes – no DNS failover. How DNS can impact your business 19 Increased Churn Decreased Loyalty Increased Acquisition Costs #INAPDNS
  20. 20. Business Impacts 20 Average Delay in Websites when Business Performance Starts to decline: Trac Research: http://www.slideshare.net/KenGodskind/alertsitetrac Compuware/Gomez Annual Survey: Why Web Performance Matters Aberdeen Group report, “The Performance of Web Applications: Customers are Won or Lost in One Second.” 4.4 seconds Impact on conversion rate for every additional second of website load delay -7% Proportion online shoppers that said they’d leave for a competitor’s site rather than suffer delays: 75% #INAPDNS
  21. 21. Shoppers per month 85,000 Typical Conversion Rate 2.00% Shoppers Buying Item per month 1,700 Typical Cart Size 42$ Average Revenue per Month 71,400$ Shoppers per month 75,000 Slow-site Conversion Rate 1.86% Shoppers Buying Item per month 1,395 Slow-site Cart Size 40.74$ Average Revenue per Month 56,832$ Lost Revenue per Month 14,568$ Lost Revenue per Day 478$ Lost Revenue per Minute 0.33$ Business Impacts 21 Downtime Unacceptable Lag 7% conversion rate reduction 3% cart size reduction (DNS servers completely unavailable) (5.4 seconds or +1 second of incremental delay) Shoppers per month 85,000 Typical Conversion Rate 2.00% Shoppers Buying Item per month 1,700 Typical Cart Size 42$ Average Revenue per Month 71,400$ Average Revenue per Day 2,341$ Average Revenue per Minute 1.63$ Lost Revenue per Minute 1.63$ #INAPDNS
  22. 22. What DNS solution is right for you? 22 Manage every aspect of DNS, from operations to infrastructure. DIY Home-grown DNS Control  Complexity ×Cost ? Vulnerability Performance × × Support ? Feature Set ? #INAPDNS
  23. 23. What DNS solution is right for you? 23 Manage every aspect of DNS, from operations to infrastructure. Bundled ISP/Hoster DNS ISP or Hoster bundles DNS with bandwidth commit or purchase of servers. DIY Home-grown DNS Control Complexity Cost Vulnerability Performance  ? ? × × Support ? Feature Set ? Control  Complexity ×Cost ? Vulnerability Performance × × Support ? Feature Set ? #INAPDNS
  24. 24. What DNS solution is right for you? 24 Managed DNS Control Third party manage every aspect of DNS, from operations to infrastructure.  Complexity Cost ? Vulnerability Performance Support     Feature Set  Manage every aspect of DNS, from operations to infrastructure. Bundled ISP/Hoster DNS Control ISP or Hoster bundles DNS with bandwidth commit or purchase of servers. Complexity Cost Vulnerability Performance  ? ? × × DIY Home-grown DNS Support ? Feature Set ? Control  Complexity ×Cost ? Vulnerability Performance × × Support ? Feature Set ? #INAPDNS
  25. 25. Key Takeaways 25 • Don’t neglect your DNS service. This results in loss of traffic, revenue and happy users. • A robust Managed DNS solution provides the features, reliability, reach and performance needed to support todays websites and applications in addition to solving the drawbacks of an in-house or ISP DNS solution. • DNS can be a disaster recovery solution by using failover to ensure your users can always find you. #INAPDNS
  26. 26. Internap’s Managed DNS 26 Internap’s Managed DNS uses anycast routing across 24 POPs (points of presence) worldwide to quickly send requests to the closest name server and leverages our MIRO-enabled network to minimize latency and improve consistency. Our intuitive web interface and customizable API provide the control and flexibility you need to quickly get your websites up and running. DNS POP Metros Atlanta New York (2) Boston Philadelphia Chicago (2) Phoenix Dallas San Francisco Denver Seattle Frankfurt Singapore Hong Kong Sydney Houston Tokyo Irvine Toronto London Washington D.C. Los Angeles Miami Internet users and Internap Managed DNS POP locations #INAPDNS
  27. 27. Further Reading 27 • Where do I learn more about DNS? http://www.techsupportalert.com/content/what-dns-servers-do.htm • Is DNS important? http://www.techrepublic.com/blog/data-center/dns-painful-reminders-of-how-important-it-is/ • How do I measure my own site’s DNS performance? http://tools.pingdom.com/fpt/ • How can DNS can help during outages? http://www.sans.org/reading-room/whitepapers/recovery/touch-disaster-recovery-solution-continuity- operations-33373 • Internap Managed DNS webpage and datasheet: http://www.internap.com/network-services/ip-services/managed-dns/ #INAPDNS
  28. 28. 28 Q&A #INAPDNS

Editor's Notes

  • OK thanks very much Ansley. I’m going to quickly walk through what we’d like your to walk away with after this webinar. We really have 6 goals for our discussion today – first we’re going to define DNS and describe how a basic DNS
  • Local
  • Downtime has a profound impact on any business and can happen to anyone and for a multitude of reasons including:

    Hardware failures
    Malicious attacks (DDOs, hackers)
    Scheduled maintenance and upgrades
    Disasters

    Being down translates into loss revenue and customer loyalty. Even your search engine rankings can be affected by outages if your downtime is long enough*.

    Failover is a disaster recovery solution that makes sure websites remain available in the event of an outage by automatically redirecting traffic to a backup location.
  • Ok thanks Ben



    Main Downtime reasons:
    Security
    Hardware or network failures
    Data center failure

    Several kinds of DNS failover – active, passive, active/active, active/passive

    Change slide to include graphic
  • Main Downtime reasons:
    Security
    Hardware or network failures
    Data center failure

    Several kinds of DNS failover – active, passive, active/active, active/passive

    W

    Change slide to include graphic
  • Home Grown DNS More times than not this is going to be an off-the shelf solution like BIND or Tiny DNS. This might practically involve 2 servers in the same location.


    Home Grown DNS

    Pros:
    Control – Manage every aspect of DNS, from operations to infrastructure.

    Cons:
    Costly – Personnel and operational costs
    Vulnerable – Low security and sensitive to outages
    Performance – No geographically distributed servers
  • Basic ISP DNS services are usually offered to their customers are either a free feature or at very low cost. We’re typically talking about companies that primarily sell connectivity or hosting services and then bundle DNS as part of their base offering. Hosting providers and Domain name registrars also sometimes bundle DNS with their services making purchase easy and economical. Unfortunately, Basic ISP DNS often only consist of a couple of name servers that aren’t adequately distributed. Features like anycast, failover, broad record type support, and self service user interface are often non-existent. Further, lack of dedicated support and engineering resources can affect security, availability, and increase burdens on in-house staff to address issues.

    Pros:
    Price – Most ISPs provide DNS at little to no cost.

    Cons:
    Performance – Often ISPs are geographically restricted.
    Support – Most ISPs don’t focus on DNS related issues
    Thin – Limited features (no anycast, failover, etc.)
    Control – DNS settings are usually handled by the ISP.

  • Managed DNS
    Unbundled managed DNS providers often provide the most robust, flexible DNS solutions. These services offer a diverse set of features and capabilities. Given the availability of control panels and APIs, these services often provide better control and make management easier and more transparent than home grown or bundled solutions. Moreoever, security vulnerabilities are less likely because dedicated teams are handling patches and monitoring infrastructure health at all times. In addition, performance of unbundled managed DNS services are often better that other options because they include a very broad footprint of name servers , strategically placed across the world. This improves resolution times and redundancy. Internap’s Managed DNS for example has 29 PoPs across three continents. Finally, feature sets in unbundled Managed DNS offerings can be broader than other alternatives. I’m going to hand things off to Ben to cover a couple of important features to look out for in DNS services.


    Pros:
    Performance – Geographically dispersed servers.
    Control – Easy to manage basic settings and feature rich.
    Reliable – Handle security risks as well as disaster recovery.
    Support – 24/7 support, analytics and SLA.

    Cons:
    Price – Charged by number of queries or queries per second, yet still more affordable than an in-house solution (some providers may also offer free DNS with limited features)

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