How the AOL.com Architecture Evolved to 99.999% Availability, 8 Million Visitors Per Day, and 200,000 Requests Per Second

The AOL homepages receive more than 8 million visitors per day.  That’s more daily viewers than Good Morning America or the Today Show on television.  Over a billion page views are served each month.  AOL.com has been a major internet destination since 1996, and still has a strong following of loyal users.

The architecture for AOL.com is in it’s 5th generation.  It has essentially been rebuilt from scratch 5 times over two decades.  The current architecture was designed 6 years ago.  Pieces have been upgraded and new components have been added along the way, but the overall design remains largely intact.  The code, tools, development and deployment processes are highly tuned over 6 years of continual improvement, making the AOL.com architecture battle tested and very stable.

The engineering team is made up of developers, testers, and operations and totals around 25 people.  The majority are in Dulles, Virginia with a smaller team in Dublin, Ireland.

In general the technology in use are Java, JavaServer Pages, Tomcat, Apache, CentOS, Git, Jenkins, Selenium, and jQuery.  There are some other technologies which are used outside that stack, but these are the main components.

Please Click Here to read rest of the article. This article is hosted at Highscalability.com.

Related Posts

  • Distribution, Scale and Flexibility with ZeroMQDistribution, Scale and Flexibility with ZeroMQ In this talk Pieter Hintjens explains the basic techniques for building very large distributed systems using fast asynchronous messaging in general, and ZeroMQ specifically. Pieter Hintjens (@hintjens) is the lead maintainer of ZeroMQ, and CEO of iMatix Corporation. Pieter speaks […]
  • Strategy: Three Techniques To Survive Traffic Surges By Quickly Scaling Your Site – HighScalability.comStrategy: Three Techniques To Survive Traffic Surges By Quickly Scaling Your Site – HighScalability.com Matthew Might, as a first responder to a surprise traffic surge on his inexpensive linode hosted blog, took emergency steps that you might find useful in a similar situation: Find the bottleneck. Reloading the page in firebug showed the first page took 24 seconds to load and after […]
  • The Essential Role of an Architect in Open Systems ImplementationThe Essential Role of an Architect in Open Systems Implementation About the paper - The "Essential Role of an Architect in Open Systems Implementation" is a paper published by Cary Millsap while working at Oracle way back in 1998. As the title suggests the paper focuses on various important aspects of the role of an Architect in an Open Systems […]
  • Dimensions To Consider When Designing Applications For The CloudDimensions To Consider When Designing Applications For The Cloud Introduction - With the increasing maturity of cloud service offerings and realization by customers of the benefits of moving to cloud based applications/platforms/services it's not a surprise that IT shops around the world have cloud adoption some where on their agenda. In context of […]