Distributed Framework for Social Networks

Transcription

1 Distributed Framework for Social Networks Dr.-Ing. Kalman Graffi Tel Fachgebiet Multimedia Kommunikation Prof. Dr. Christian Scheideler Fakultät für Elektrotechnik, Informatik und Mathematik Universtiät Paderborn Fürstenallee 11, D Paderborn, Deutschland Tel , Fax März 2011

2 Online Social Networks What are Online Communities technically? Web-based applications (StudiVZ, Facebook, MySpace, Xing) Provide different services for community members Personal information and photos Events Games Plugin architecture Friends Social interaction FG Theorie verteilter Systeme 2

3 Trend of decentralized online social networks Trends Decentralization Freedom from providers Security Put privacy first FG Theorie verteilter Systeme 3

4 Resources at the edge Servers: 50M PCs in last 3y: 1050M Consumer resource can be harvested Sum of consumer PCs sold in the last 3 years: 1.050M Servers worldwide 50M Google: 1M FG Theorie verteilter Systeme 4

5 Motivation Online social networks are very popular Need for decentralization and more security and cooler applications IN Peer ^ OUT Resources are available and powerful Can we build a P2P-based online social network? P2P ~ paradigm using only the user devices to create infrastructures Are the public research results useable? Are they combinable? Is the quality still good? FG Theorie verteilter Systeme 5

6 A Distributed Framework Social Networks Goal: Framework for distributed applications P2P-based Consisting of essential building blocks Application: online social networks Built through plugins Challenging question: Does research provide useful results? Example: overlays Chord, Kademlia, Gnutella, Pastry... Some useful building blocks exist FG Theorie verteilter Systeme 6

7 Focus and Assignment Create a P2P-based framework for online social networks Analyze related work: papers+software Develop a working solution Evaluate it Improve it to fit scenario needs On various layers the p2p overlay storage and replicatio quality monitoring security app-hosting Design and implement in Plugins A new online social network Extendable, secure and fancy FG Theorie verteilter Systeme 7

8 Data Structures and Positioning in the Network FG Theorie verteilter Systeme 8

9 Possible Outcome H( my data ) = 3107? Does my p2p system work? ? berkeley.edu 611 planet-lab.org peer-to-peer.info Structured Overlay: DHT Underlay: The Internet Which research results are useful? How to build running prototypes? Including newest research results FG Theorie verteilter Systeme 10

10 Architecture Details GUI Framework: Extendable and flexible Provides an interface to the Plugins Plugins: Functionality of online social networks (and more) Easy Plugin-to-Plugin communication Over shared storage Over Plugin ID based messaging Information Cache: Enables the Plugins to reuse the data Hides the asynchronous effects of distributed data storage Monitoring and Management: Provides statistics on system behavior Enables the provider to control the service quality Secure Message Dispatcher: Provides secure, low-delay Plugin-to-Plugin communication Integrate offline messaging feature Secure Storage Dispatcher + access control: Storage and retrieval of data objects (PAST) Replicates data and guarantees their availability Structured Peer-to-Peer Overlay Connects the nodes and enables inter-peer communication FG Theorie verteilter Systeme 11

11 Organization Team: Dr. Kalman Graffi, Prof. Dr. Christian Scheideler Fachgruppe Theorie verteilter Systeme Registration: Registration in PAUL to Kalman Graffi Preliminary planning: Kick-off meeting at end of March Assignement of seminar topics Lectures are hold in April/Mai Block-seminar will take place in Mai The project ends in March 2012 FG Theorie verteilter Systeme 9