Greening the Internet with Content-Centric Networking Uichin Lee, Ivica Rimac, Volker Hilt Bell Alcatel-Lucent April 14, 2010.

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Presentation transcript:

Greening the Internet with Content-Centric Networking Uichin Lee, Ivica Rimac, Volker Hilt Bell Alcatel-Lucent April 14, 2010

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Internet = Content Dissemination Today’s Internet is all about “content dissemination”  IPTV, Hulu, Netflix, user generated content (Facebook, Twitter, YouTube) Today’s strategies for meeting ever increasing user demands:  Service providers (e.g., Google)  enlarging data centers  Network providers (e.g., AT&T)  increasing network capacity  and some service providers even build their own private network (e.g., Google, Microsoft) Content dissemination consumes lots of energy, ranging from servers in data centers to network routers to home PCs (and still increasing).

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Energy-Aware Content Dissemination Today Most research focused on energy consumption/optimization at data centers  Dynamic resource provisioning (e.g., DVFS, sleeping)  Request routing to a data center with lower $/J  Energy-proportional computing: power consumption ~ utilization Energy consumption/optimization of networking devices  Current networking devices show poor energy efficiency (e.g., high idle power regardless of utilization)  Researcher is seeking for energy-proportional networking  Low power idle/sleeping mode, dynamic rate adaptation (e.g., DVFS, tx power control), and sleeping (e.g., wake-on-LAN) Energy-proportional computing/networking is not enough … As user demands increase, so does the power consumption.

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Can Content Distribution Networks (CDNs) Help? Pushing content closer to the users  Hop count reduction (overall network traffic reduction)  energy savings CDN Strategies:  Limelight  placing CDN servers near a small # of ISP core nets  Akamai  placing CDN servers deep into a large # of ISP networks’ sites  Nano Data Center (NaDa)  home gateways (STBs/modems) as CDN servers (peer-to-peer delivery among NaDa servers) Edge Router Core Router ONTOLT DSLAMModem AccessMetro/Edge NetworkCore Network NaDa Digital Media Delivery Platform

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Shifting Gears: Content-Centric Networking (CCN) Simple, unified, flexible communication architecture  Data has a name, not a location (+network wide content caching)  Anything that moves bits in time or space can be used CCN removes many layers of management infra (e.g., DNS, mobile IP, CDN) Today’s management infrastructure DNS Service POP M/R Portal U Delivery POP     Content POP P Mobile IP Content-centric networking CCN Router ccn://youtube.com/video1

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Content-Centric Networking (CCN) CCN enables efficient content dissemination to users Energy efficiency of CCN content routers  Extra memory hierarchy that requires minimal power draws  Ex) Memory 4G ~ 10W, SSD 32G ~ 1W, Disk ~ 12W (if needed) Content Centric Network (CCN) Edge Router Core Router ONTOLT DSLAMModem AccessMetro/Edge NetworkCore Network NaDa Digital Media Delivery Platform Most energy efficient solution: P2P, NaDa, CDNs, CCN?

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 W/Gbps with CCN W/Gbps Energy Efficiency of Networking Devices: A Survey Metric: W/Gbps (= nameplate power / max bandwidth)  Assumption: energy proportional networking Core1: Cisco CRS 1= 4834W/320G Core2: Cisco CSR = 800W/28G Edge: Cisco 7507 = 400W/5G DSLAM: Zyxel IES-500M = 800W/3.84G OLT: Fujitsu FA2232U = 400W/10G DSL Modem: D-Link DSL 2320B = 15W/10M ONT: Allied Data = 12W / 50M PC: Dual Core = 150W / 10M or 50M Energy consumption increases exponentially as content is being moved closer to end users.

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Evaluation Methodology:  Traceroute data set  top 20 content providers ranked by Alexa  Querying these providers from 18 different traceroute servers in the US  Tier 1/Non-Tier 1 classification (i.e., edge vs. core router)  Based on a publically available Tier-1 ISP list Metric:  Energy consumption (Joule) for downloading 1 Gbit of content (125MB) Scenarios:  CCN-enabled core/edge nodes: 0% (NonCCN), 20%, 100% Assumption:  Users access popular content (100% cache hit rate)

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Energy Consumption (DSL Users) CCN is the most energy efficient method (even with incremental deployment) NaDa: content traverses expensive DSL gateways twice! Top 20 content providers

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Energy Consumption (GPON Users) Efficiency of NaDa gets better as access link speed increases (GPON >> DSL) CCN still outperforms when content routers are sufficiently deployed

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Energy Consumption Breakdowns NonCCN: (DSL) GW>Edge>Server>Core>Access vs. (GPON) Edge>Server>GW>Core>Access CCN: Home gateway dominates energy consumption DSLGPON

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April 2010 Summary Content distribution networks enable energy-efficient data dissemination  E.g., traditional CDN (Akamai/Limelight), Nano Data Center (NaDa), Content-centric networks (CCN). Energy efficiency of networking devices must be considered for energy- efficient data dissemination  E.g., DSL-based NaDa performs worse than direct fetching from origin servers. Network-wide content caching via CCN is the most energy-efficient method even under incremental deployment scenarios.

Copyright © 2009 Alcatel-Lucent. All rights reserved | Greening the Internet with CCN | April