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akamai - •.akamai.net name server(top level>...

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Click to edit Master subtitle style Globally Distributed  Content Delivery Presenter: Baoning Wu 03/25/2003
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Motivation Flash crowd problem Overload can crash web sites and  cause high response time Akamai’s system
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Akamai’s network infrastructure Allocate more servers to sites  experiencing high load and serve all  clients from nearby servers. The system directs client requests to  the nearest available server likely to  have the requested content.
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How to find servers? Dynamic DNS system
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Criteria for name servers to resolve IP  Service requested Server health Server load Network condition Client location
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DNS resolution A7.g.akamai.net Root name server -> .net name server ->
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Unformatted text preview: • .akamai.net name server(top level)-> • .g.akamai.net name server(low level) Network services • Static content – Use cache, apply lifetime • Dynamic content – Assemble dynamic content on edge server • Streaming media – Windows Media, Real, Apple’s QuickTime Challenges • Scalability – Must scale to many distributed servers • Reliability – Both hardware and software • Software deployment – Deploy new network software in stages Challenges (continue) • Content visibility and control – Cache consistency – Lifetime control – Authentication and authorization – Integrity control – Visibility into access patterns – billing • Questions?...
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