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Kalman Graffi - Monitoring and Managing Quality in P2P-based Online Social Networks - 2011

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Kalman Graffi
Kalman Graffi

Dr.-Ing. Kalman Graffi presents in this talk in Karlsruhe 2011 research results on both quality-controlled p2p systems and p2p-based online social networks. Monitoring the quality of service of peer-to-peer systems, helps commercial system providers and users to observe the behavior of the system. With an automated re-configuration approach misleading trends and quality issues can be tackled, resulting in a self-optimizing peer-to-peer network. However, new application areas need to be investigated for the p2p paradigm. Online social networks are very popular nowadays, using a p2p based approach could both benefit the system providers and users. With LifeSocial, an operational peer-to-peer-based prototype will be presented. The solution is reliable, monitored, secure and provides in addition to the typical functionalities of online social networks some collaborative elements. An overview and videos are given in www.lifesocial.org Bio: Kalman Graffi graduated from the Technische Universität Darstadt with the degree Dr.-Ing. in electrical engineering, a diploma in computer science and a diploma in mathematics. He is focusing on the monitoring and management of peer-to-peer systems as well as on peer-to-peer based online social networks.

Tecnologia
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Monitoring and Managing Quality in P2P-based Online Social Networks
Communication Paradigms in the Internet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Motivation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Challenges for Quality of P2P Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Approaches to Address Quality Challenges ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda of the talk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
System Management Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Metric Metric Goal
Running Example: Improving the Lookup Delay ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],100ms 100ms 100ms 2207 2906 3485 2011 1622 1008 709 611 Hop Count Routing
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SkyEye.KOM: Tree Topology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Internet 0.5 0.25 0.375 0,3125 0.75 0.875 0.625 0.125 Domain Domain ID 0.3125 1 10 50 20 30 40 45 15 P2P Overlay 0 1 0.09 0.2 0.31 0,4 0.5 0.6 0.75 0.9 0.375 0.25 0.5
SkyEye.KOM: Communication Protocol ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Local measures, (synchronized signal in simulations) Aggregated view Global view
Evaluation of SkyEye.KOM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Simulation Run – N=10000, UI=60s, β=4 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Testbed Evaluation: Validation of Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],10% 20% Random 50% 50%
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Control Theory in P2P Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],System Provider Users Direct setting of configuration Mechanisms on peers Global p2p system Network dynamics Peer heterogeneity Application shift Metric goals Controller Configuration New configuration Information dissemination Monitoring: information gathering Service quality
Planning a new Configuration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],? Metric goal Current metric Parameters
Re-Configuration of the System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Statistics: metrics and paramters Global view on metrics & new parameters ? Local metric statistics Global metric statistics Metric Update Metric ACK Local parameter statistics New parameter settings
Management of the Hop Count in Chord ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],2207 2906 3485 2011 1622 1008 709 611 Hop Count Routing + 100 % Hop count too large - 10 % Hop count too small Finger table size Static Rule Approach
Evaluation Results on SkyNet.KOM ,[object Object],[object Object],[object Object],[object Object],[object Object],8 100 Hop Count 80 20 Finger Table Size 2 Steps Initial Start: too large 7.1 5.7 Hop Count 117 160 Finger Table Size 3 Steps Initial Start: too small
Summary and Implications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What might be the next P2P application?
Online Social Networks ,[object Object],[object Object],[object Object],Plugin architecture Events Personal information and photos Friends Social interaction Games
Goals and Motivations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Our goal: all of the above following the P2P paradigm
[object Object],[object Object]
Current IT Paradigm: Client / Server ,[object Object],[object Object],[object Object],[object Object],€ € € €
Alternatives? – Peer-to-Peer based Platforms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],€ € €
Our Solution: LifeSocial.KOM ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Screenshots  See: www.lifesocial.org
See: www.lifesocial.org  See: www.lifesocial.org
Screenshots  See: www.lifesocial.org
Screenshots  See: www.lifesocial.org
[object Object],[object Object]
Architecture Overview on LifeSocial.KOM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Challenges and Lessons Learned ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Document Types, Obvious Storage Keys ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Profile storage key p = “User_Kalman_Graffi” Name: Kalman Age: 27 University: Technische Universität Darmstadt  See: K. Graffi et al., “A Distributed Platform for Multimedia Online Communities” In: IEEE International Symposium on Multimedia '08 (IEEE ISM’09), December 2008.
Data Positioning in the Network replica replica replica replica replica request responsibility range
SECURITY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Detailed Idea of Distributed Access Control ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SharedItem objectID Header Privileged users Payload Signed CryptedItem objectID Key list userID A – key A userID B – key B userID C – key C Byte array containing encrypted SharedItem Encrpyted with … 5  See: K. Graffi et al., “Practical Security in P2P-based Social Networks” In: IEEE Local Computer Networks '09 (IEEE LCN’09), October 2009. Symmetric Key Pub User A Symmetric Key Pub User B Encrpyted with Pub User A Pub User B [userID A] = [userID B] = extract 1 Serialized and encrypted with symmetic key 2 userIDs are public keys 3 wrap symmetric key with public key 4
Simple Idea of Distributed Access Control ,[object Object],[object Object],[object Object], See: K. Graffi et al., “Practical Security in P2P-based Social Networks” In: IEEE Local Computer Networks '09 (IEEE LCN’09), October 2009. For
[object Object],[object Object],[object Object]
Monitoring and Evaluation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object], See: K. Graffi et al., “Monitoring and Management of Structured Peer-to-Peer Systems” In: IEEE Peer-to-Peer Computing '09 (IEEE P2P’09), September 2009.
Some Statistics (1)
Some Statistics (2)
Some Statistics (3)
Plugin Architecture Overview
See: www.lifesocial.org  See: www.lifesocial.org
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Issues and Challenges in Academia ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Questions? Have a look at: www.lifesocial.org www.skynet-project.com www.kom.tu-darmstadt.de Does my p2p system work?
Backup Slides
Monitoring of P2P Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Query for 2 peers: Online time < 60m Peers B, D
SkyEye.KOM: Protocols
Interdependencies: Finger Table Size, Contacts, Hop Count, Lookup Delay ,[object Object],[object Object],[object Object],[object Object],[object Object]
Selected Results from the Testbed Evaluation
Comparison of Benchmark Signals
Modules in SkyEye.KOM
SkyEye.KOM – Variants ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Quality Properties of SkyEye.KOM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Additional Slides on Management
Comparison of C/S Solution with SkyEye.KOM
Overview on Quantity of Monitored Statistics ,[object Object],[object Object],[object Object]
Comparison of Benchmark Signals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Parameter Studies: Identification of Tradeoffs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Management Goals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],System Provider Users Direct setting of configuration Mechanisms on peers Global p2p system Network dynamics Peer heterogeneity Application shift Metric goals Controller Configuration New configuration Information dissemination Monitoring: information gathering Service quality
 

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Kalman Graffi - Monitoring and Managing Quality in P2P-based Online Social Networks - 2011

Notas do Editor

  1. Create a new overlay/mechanism for every case?  Reuse existing overlays / mechanisms
  2. “ The well-defined and controllable behavior of a system with respect to quantitative parameters ” Does the system meet the expectations? How can we know? Download counter? Application GUI?
  3. Tree topology characteristics All peers part of spanning tree Peer positions calculated Churn-resistant protocols based on IDs
  4. | | November 19, 2007
  5. Model: behavior synthesis Simulation: large scale, detailed Testbed: accurate prototype
  6. MODELL! Log_beta(N) * UI = ???
  7. MODELL für Kosten? Warum 3KB/s ?
  8. | | November 19, 2007
  9. | | November 19, 2007