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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

Notes de l'éditeur

  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