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Published byMiranda Bell Modified over 9 years ago
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Ming-Chen Zhao, Paarijaat Aditya, Yin Lin Andreas Haeberlen, Peter Druschel, Bruce Maggs, and William Wishon A First Look at a Hybrid Content Delivery System
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Powering a Better Internet © 2011 Akamai Akamai Network Deployment 85800+ Servers 1000+ Networks 79+ Countries 1795+ POPs
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Powering a Better Internet © 2011 Akamai Akamai Peak Instant and Daily Statistics Bit rate (01/09/11): 4.8 Tbps Request rate (02/21/11): 16.7 million hits/sec Bytes delivered (12/27/10): 42.3 Pbytes HTTP requests received (02/21/11): 961.5 billion Unique client IPs (02/16/11): 471.5 million
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Powering a Better Internet © 2011 Akamai Download Manager Product/Service Hybrid between a fixed-infrastructure CDN and a pure peer-to-peer delivery system Based on technology developed by Red Swoosh (acquired by Akamai in 2007) Goal is to deliver large files at lower cost In beta operation today
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Powering a Better Internet © 2011 Akamai NetSession Interface client-side software runs as a service on Windows or MacOS provides an API to installation software or browser stays connected to an Akamai Control Node each installation is supposed to have a unique GUID
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Powering a Better Internet © 2011 Akamai Growth in Number of Installations Full product roll-out expected summer 2011.
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Powering a Better Internet © 2011 Akamai Architecture BitTorrent-like protocol with control nodes serving as “trackers” and assigning peers CDN acts as a backstop Akamai Control Nodes Akamai Edge Servers Peers
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Powering a Better Internet © 2011 Akamai Logging Content providers want all downloads to be logged Peers must report P2P downloads to control nodes as they occur Akamai Edge Servers also log downloads from peers
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Powering a Better Internet © 2011 Akamai Statistics from December 2010 Logs
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Powering a Better Internet © 2011 Akamai Locations of Clients per EdgeScape Granularity of predictions varies by continent.
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Powering a Better Internet © 2011 Akamai December Client Logins What happened December 8?
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Powering a Better Internet © 2011 Akamai IP Addresses per GUID in December Category 3 (flagged) look like multiple installations with the same GUID.
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Powering a Better Internet © 2011 Akamai Clients Leave P2P Setting Unchanged Content provider decides on initial setting.
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Powering a Better Internet © 2011 Akamai File Size Distribution For customers other than J and F, median file size was 872MB.
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Powering a Better Internet © 2011 Akamai P2P Efficiency for Largest Enabled Customers Matches or exceeds earlier predictions.
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Powering a Better Internet © 2011 Akamai Efficiency versus Number of Peers
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Powering a Better Internet © 2011 Akamai Success Rates, All Downloads Over 86% success rate in December 2010.
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Powering a Better Internet © 2011 Akamai Terminations and Failures Occur Early
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Powering a Better Internet © 2011 Akamai Performance Majority P2P downloads average several Mbps.
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Powering a Better Internet © 2011 Akamai Content Popularity Typical?
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Powering a Better Internet © 2011 Akamai NetSession Versions Observed in Field NetSession should excel at downloading itself.
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Powering a Better Internet © 2011 Akamai Ongoing Work Designing mechanisms to protect the logging system against attacks (Successfully attacked it ourselves.)
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