Blueprint for Introducing Disruptive Technology into the Internet.ppt
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1、1,A Blueprint for Introducing Disruptive Technology into the Internet,Larry Peterson Princeton University / Intel Research,2,Claims,Network/Application distinction is blurring pressure to move intelligence into the network Full integration will result in a new service-oriented network architecture H
2、owever the Internet is increasingly ossified,3,Take 1: Extensible Routers,Local (node-centric) perspective Motivating examples discontinuity at assumption boundaries e.g., trust, performance, address space, Additional factor emerging hardware e.g., network processors Goals extend router with new ser
3、vices achieve robust performance on diverse hardware,4,R,Rest of the Internet,My Network,Untrusted Tethered High Latency High BW High Power DiffServ,Trusted Wireless Low Latency Low BW Low Power IntServ,Assumption Boundary,5,Take 1: Extensible Routers,Local (node-centric) perspective Motivating exam
4、ples discontinuity at assumption boundaries e.g., trust, performance, address space, Additional factor emerging hardware e.g., network processors Goals extend router with new services achieve robust performance on diverse hardware,6,Take 2: PlanetLab,Global (network-wide) perspective Motivating exam
5、ples geographically distributed services (e.g., DHT, CDN) network measurement and anomaly detection Fundamental advantages latency (proximity) multi-lateralization decentralized control,7,Overlay Network,1000 viewpoints on the network,includes both edge sites and network crossroads,8,Dual Roles,Rese
6、arch testbed large set of geographically distributed machines diverse & realistic network conditions Deployment platform services: design evaluation client base nodes: proxy path physical path,9,Design Principles,Slice-ability (distributed virtualization) Distributed Control of Resources Unbundled M
7、anagement Application-Centric Interfaces,10,Slice-ability,Each service runs in a slice of PlanetLab distributed set of resources (network of virtual machines) allows services to run continuously VM monitor on each node enforces slices limits fraction of node resources consumed limits portion of name
8、 spaces consumed Issue: global resource discovery how do applications specify their requirements? how do we map these requirements onto a set of nodes?,11,Distributed Control of Resources,At least two interested parties service producers (researchers) decide how their services are deployed over avai
9、lable nodes service consumers (users) decide what services run on their nodes At least two contributing factors fair slice allocation policy both local and global components (see above) knowledge about node state freshest at the node itself,12,Unbundled Management,Partition management into orthogona
10、l services resource discovery monitoring node health topology management manage user accounts and credentials software distribution Issues management services run in their own slice allow competing alternatives engineer for innovation (define minimal interfaces),13,Application-Centric Interfaces,Inh
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