Plaxton PowerPoint PPT Presentations

a router. 4 ... labels) of size log n bits independent of their location and semantic ... hash by the maximum number of trailing bits is the root of O. ...

Used in several important P2P networks like Microsoft's Pastry and UC ... also the backbone of Oceanstore, blueprint of a persistent global-scale storage system ...

Building block: Plaxton Trees. or, Providing High Availability and Adaptability ... Insert arbitrary nodes can divert router load ...

Primary neighbour sequence u k e??a? ? a????????a ?? ?? e a????? ??a u0, uk ... ?a? t?? d?a ???a?? e??? a?t??e? ???? de? e??????ta? ta 'hot spots' st? d??t??. ...

Fault-tolerant Routing in Peer-to-Peer ... Gnutella Inefficient flooding Uses Plaxton s Algorithm: ... on average crossing speed. mz= sup This may give ...

Pastry: prefix-based routing. Similar to Plaxton Trees [Plaxton et al. 97] But added ... 'At any time, at most one overlay node accepts messages with a given key' ...

Simultaneous Insertions in Tapestry. Kris Hildrum, UC Berkeley. hildrum@cs. ... Tapestry mesh inspired by paper by Plaxton, Rajaraman and Richa from SPAA 1997. ...

Title: Slide 1 Author: Chandrashekhar Nagarajan Last modified by: dpw Created Date: 10/26/2005 9:12:01 PM Document presentation format: On-screen Show (4:3)

Basic model: A overlay network G = (V,E) which is weighted and ... Other interesting related issues include. Search ability. Handling mutable objects. Security ...

Cost of insert and lookup ... Object Insertion and Lookup. Given an object, route successively ... Insert (filename, file) into Pastry. Replicate file at the ...

UDDI or DAML-S matchmaker. decentralized approach. centralized registry. single point failure ... structured P2P networks based on DHT. logn routing hops ...

Insert entry into nearest node that matches on. last i bits ... Traverse same relative nodes as insert, except searching for entry at each node ...

Want: Geographic independence for availability, durability, and freedom to adapt ... Promiscuous Caching: Data may be cached anywhere, anytime ...

Populate neighbor maps, divert relevant traffic. Goals: Low latency. Limit ... Notify 'nearby' nodes to divert traffic. Recognize Neighbor(i 1) = Sibling(i) ...

Responsible Party: ... Birthday paradox requires over 280 unique objects before collisions worrisome ... submitted to Responsible Party which chooses a final ...

Rapid growth of bandwidth in the interior of the net. Broadband to the ... Want: Geographic independence for availability, durability, and ... Like hologram ...

Principal Resource OceanStore: An Architecture for Global-Scale Persistent Storage: John Kubiatowicz, Davic Bindel, Yan Chen, Steven Czerwinski, Patrick Eaton, Dennis ...

Opportunities for Continuous Tuning in a Global Scale File System John Kubiatowicz University of California at Berkeley The OceanStore Premise: A Utility-based ...

I focused on the skeletal system with this project because I currently teach the the functions and locations of ... As with other s within this PowerPoint, ...

Global Internet Content Delivery Bruce Maggs Akamai Technologies and Carnegie Mellon University

Arnold N. Pears, CoRE Group Uppsala University. 3rd Swedish Networking Workshop ... Arnold Pears. CoRE Group, Uppsala University. Arnold N. Pears, CoRE Group ...

Archive fragmented files to increase redundancy. Session based API ... Bayou. Byzantine agreement protocol. Block Based Comparison on Encrypted Data. Archival Storage ...

distributed linked list of copies, weaves through caches ... Directory is similar to tracker in Bit Torrent (BT) or root in P2P network ...

... deque require only read & writes unless there is only one element. ... How to distinguish between the two when checking emptiness? Still point to Node B ...

... Kademlia, Skipnet, Symphony, Koorde, Apocrypha, Land, ... Chord, Symphony = Ring. many algorithms can have same geometry. Why is Geometry important? ...

Theory Lunch (1/31) Game Theoretic Issues? ... Theory Lunch (1/31) Two-levels of Routing. Fast, probabilistic search for 'routing cache' ...

JPL site Shoemaker-Levy 9 comet strike, IBM site Deep Blue-Kasparov chess, ... 9. Random Trees Protocol (3) Protocol. Browser : request in 4-tuple form. Cache : ...

From DNS domain name, one or more bootstrap nodes is determined. ... Hash table availability: adequate replication of a (key,value) entry to ...

A Scalable, Content-Addressable Network 1,2 3 1 Sylvia Ratnasamy, Paul Francis, Mark Handley, Richard Karp, Scott Shenker 1,2 1 2 3 1 Tahoe Networks

... servers must republish location information ... Tradeoff between republishing intervals & constistency of location pointers. ... B republishes the object. ...

Self-organizing overlay network. Lookup/insert object in log16 N routing steps (expected) ... fx. ex. dx. cx. bx. ax. 9x. 8x. 7x. 5x. 4x. 3x. 2x. 1x. Routing ...

Builds connections between student and community ... Engage with like-minded peers in service. Experience personal efficacy through service ...

Exploit multicast for quicker consistency when possible. Promiscuous Caching: ... release consistency (build and use MCS-style locks) Extremely loose (weak) ...

... Addresses as ... In most cases, nodes with IP addresses that are numerically close are also ... Use of IP addresses as virtual IDs would probably produce ...

Sylvia Ratnasamy, Paul Francis, Mark Handley, Richard Karp, Scott Shenker ... Tahoe. Networks. 1. 2. 3. 1,2. 3. 1. 1,2. 1. Outline. Introduction. Design. Evaluation ...

Midnight Sun Routing Workshop June 2002. Elwyn Davies. 18 June 2002 ... systems and DOLR in particular focusses on Distributed Hash Table (DHT) functionality ...

Always a tradeoff between possible location of files and searching difficulty. Peer-to-peer allow files ... Tapestry (UCB) -- Symphony (Stanford) -- 1hop (MIT) ...

Scarborough A Renaissance Town

Each DHT has many algorithmic details making it difficult to compare. Goals: ... Comparing flexibility of DHT Geometries. Geometry's impact on Resilience ...

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Title: Diapositiva 1 Author: gencor Last modified by: gencor Created Date: 1/8/2003 11:40:48 AM Document presentation format: Presentazione su schermo

fault injection: triggering hardware and software error handling paths ... scrubbing: periodic restoration of potentially 'decaying' hardware or software state ...

Divorce information from location... Data Location & Routing (Tapestry) Data Update (1/2) ... { Search for cached object location. Once found, route via IP or ...

The Centralized Approach to Content Delivery. Akamai's Approach. Outline ... img src=' img src=' h1 Welcome to our Web site! /h1 ...

... stress. Reduction in diameter reduces : Latency. Node stress ... Reduction in Stress. 25. Ulysses : A Robust, Low-Diameter, Low-Latency Peer-to-Peer Network ...

Extend physical education in schools. Train teachers. Organize sports on a national scale ... National fitness leaders embarrassed the Liberal government over ...

well known set of landmark machines. each CAN node, measures its RTT to each landmark. orders the landmarks in order of increasing RTT. CAN construction ...

D' gal- - gal : Les r seaux Peer-to-Peer (P2P) consistent simplement mettre en relation des individus sans pour autant que certains aient un r le particulier. ...

Tapestry: A resilient global-scale overlay for service deployment. B.Y. Zhao, L. Huang, J. Stribling, S.C. Rhea, A.D. Joseph, J.D. Kubiatowicz ...

Each node's predecessor is correctly maintained ... Initializes the predecessor and fingers of node n. Updates the fingers and predecessors of existing nodes to ...

... node affects only a single other node and its immediate neighbors ... Dealing with hot-spots. popular (key,value) pairs. nodes cache recently requested entries ...

agricultural soils leak N20. 1. N2 Fixation. 2. Nitrogen Fertilizers. 3. Manure application ... a genetic and metabolic blue-print for enhanced plant carbon ...

well known set of landmark machines. each CAN node, measures its RTT to each landmark. orders the landmarks in order of increasing RTT. CAN construction ...

Approximation Algorithms: va Tardos. Cornell University. problems, techniques, and ... Blue or green. Red or green. Red or blue. s2. s1. s3. FOCS 2002. 16 ...

The systems we described do not offer any guarantees about ... Symphony. Map the nodes and keys to the ring. Link every node with its successor and predecessor ...

Jim Anderson. 1. Multiprocessor Fair Scheduling. The Case for Multiprocessor Fair Scheduling ... Idea: Allow 'delays' between subtask windows. TIME 0 5 10 15 20 ...