akamai-2 - Global Internet Content Delivery to Bruce...

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Click to edit Master sub- title style Global Internet Content Delivery Akamai Technologies and Carnegie Mellon University Bruce Maggs
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Problems with the Centralized Approach The Centralized Approach to Content De- livery The Akamai Solution Company Origins & Overview Outline Specific Research Problems
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HTML Title Page for www.xyz.com with Embedded Objects <html> <head> <title>Welcome to xyz.com!</title> </head> <body> <img src=“ <img src=“ <h1>Welcome to our Web site!</h1> <a href=“page2.html”>Click here to enter</a> </body> </html> http://www.xyz.com/logos/logo.gif > http://www.xyz.com/jpgs/navbar1.jpg >
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3 Content Provider’s Web Server DNS WWW.XYZ.COM 1 Downloading www.xyz.com - before Akamai User enters www.xyz.com Browser requests IP address for www.xyz.com Browser requests embedded objects Content provider’s web server returns HTML 10.10.123.8 2 Browser requests HTML DNS returns IP address 4 7 6 Browser obtains IP addresses for host- names listed in URLs of objects embed- ded on page Content provider’s web server returns embedded objects 10.10.123.8 5
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DNS Resolution Browser’s Cache 1 O S 2 Local Name Server 3 .com .net Root (InterNI C) 4 xyz.com DNS Servers 6 5 7 8 9 1 0 TTL: 1 Day TTL: 30 Minutes
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Differences for Streaming Player rather than browser Streaming server rather than web server Feed from live event must be distributed to server Sufficient bandwidth must be consistently available
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Problems with the Centralized Approach Slow - content must traverse multiple backbones and long distances Unreliable
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This note was uploaded on 10/24/2009 for the course CS 536 taught by Professor Sonia,f during the Spring '08 term at Purdue University-West Lafayette.

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akamai-2 - Global Internet Content Delivery to Bruce...

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