Recent Trends in Content Delivery: what data centers ...steve/presentations/Content-delivery-joint-Ph… · content-aware traffic engineering. ACM SIGCOMM Computer Communication Review,

Steve Uhlig 1

Recent Trends in Content Delivery: what data centers, Clouds, IXPs, and SDN have

changed in the Internet ecosystem

Steve Uhlig Head of Networks Research Group Queen Mary University of London

steve@eecs.qmul.ac.uk http://www.eecs.qmul.ac.uk/~steve/

Credit to collaborators from TU Berlin/Deutsche Telekom Labs & Duke/Akamai

Steve Uhlig 2

The Old Internet

Steve Uhlig 3

Today’s Internet

C. Labovitz, S. Iekel-Johnson, D. McPherson, J. Oberheide, and F. Jahanian. Internet Interdomain Traffic. Proc. of ACM SIGCOMM, 2010.

Steve Uhlig 4

What changed?

•  Mixed structure -  Tier-1 (10-20) + Large IXPs -  Regional ISPs + smaller regional IXP

•  Known AS connectivity -  Customer-provider: 90,000+ -  Peer-peer: ?

•  Traffic -  Increasingly exchanged directly between CDN

and regional ISPs B. Ager, N. Chatzis, A. Feldmann, N. Sarrar, S. Uhlig, and W. Willinger. Anatomy of a Large European IXP. Proc. of ACM SIGCOMM, 2012.

Steve Uhlig 5

The Internet Ecosystem

William B. Norton. The Internet Peering Playbook : Connecting to the Core of the Internet. DrPeering Press, 2012.

Steve Uhlig 6

Data centers

http://www.datacentermap.com/

Steve Uhlig 7

Google data centers

http://royal.pingdom.com/2008/04/11/map-of-all-google-data-center-locations/

Steve Uhlig 8

Clouds

http://www.datacentermap.com/

Steve Uhlig 9

From infrastructures to content players

B. Ager, W. Mühlbauer, G. Smaragdakis, and S. Uhlig. Web content cartography. Proc. of ACM SIGCOMM IMC 2011. (best paper award)

Steve Uhlig 10

Geographic coverage of popular CDNs

Steve Uhlig 11

Content is power

•  How different network rankings reflect reality?

B. Ager, W. Mühlbauer, G. Smaragdakis, and S. Uhlig. Web content cartography. Proc. of ACM SIGCOMM IMC 2011. (best paper award)

•  CAIDA: BGP-based degree or customer-cone •  Renesys: variant of CAIDA-cone •  Knodes: Fixedorbit.com centrality metric •  Arbor: Interdomain traffic •  Potential: hostname-based •  Normalized potential: weighted hostnames

Steve Uhlig 12

CDN 3.0

•  Hybrid infrastructures: Akamai, PPTV

•  Meta-CDNs: Conviva, Xunlei

•  Exploit virtualization, e.g., build dynamic CDNs through ISP micro-datacenters or Clouds

ISPS

S

S

S

S

S

S

S

= PoP with Microdatacenter (Service deployed)= PoP with Microdatacenter

PoPs

B. Frank, I. Poese, G. Smaragdakis, A. Feldmann, S. Uhlig and B. Maggs. Enabling content-aware traffic engineering. ACM SIGCOMM Computer Communication Review, October 2012.

Steve Uhlig 13

Enabler: SDN

•  Software-defined networking •  Example: Google

Steve Uhlig 14

Conclusion

•  Content delivery is shaping the Internet •  Significant local network interconnection and

traffic •  CDN 3.0: hybrid and ISP-CDN clouds •  SDN useful for dynamic content delivery and

traffic engineering