1 / 34

Multiple Path Connection through a Set of Connection Relay Servers

This presentation discusses the implementation and performance of MPC-CRS, a multipath routing solution that utilizes connection relay servers to improve network performance and utilize available bandwidth effectively. It also explores lessons learned and future work.

bcrist
Télécharger la présentation

Multiple Path Connection through a Set of Connection Relay Servers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Multiple Path Connection through a Set of Connection Relay Servers Master Thesis Presentation Syama S Kosuri Department of Computer Science Univ. of Colorado at Colorado Springs

  2. Outline of the Talk • Background and Motivation • Related Work • MPC-CRS • Performance of MPC-CRS • Lessons learned • Future work

  3. Internet Explosion • Started with ARPANET in 1969 • Exchange information through Email and UseNet groups • Before 1990 • Mainly used for broad general communication • Forecasted traffic by 2007 • 5175 peta bits per day – according to IDC

  4. Factors driving Internet explosion • Multimedia applications Ex: Kaaza - Application for trading songs • P2P applications • Ex: Gnutella - Application for peer-to-peer sharing of data between computers • etc • Large contribution from small traffic like mail, games, messaging etc.

  5. Impacts of internet traffic explosion • Poor application performance • Congested networks • Frequent break-downs

  6. Obvious solution • Upgrade or add new network infrastructure to meet the growing demand • Then what is the problem? • A very costly affair • Time consuming too…

  7. What is the alternative? • Devise methods to make use of the available bandwidth effectively • What is the effective bandwidth of a network? – Lowest bandwidth of all links in a network

  8. Multipath routing • Single path Vs. Multiple paths

  9. Advantages of multipath routing • Increased network performance • Application can use the paths that best suit its needs • Aggregate path resources

  10. Available multipath solutions • Data Link Layer • Network Layer • Transport Layer • Parallel download from multiple mirror sites

  11. Data link layer • combining multiple physical network links between two devices into a single logical link for increased bandwidth

  12. Network and Transport layer • Network Layer • Table-driven algorithms • Source Routing • Multi Protocol Label Switching (MPLS) • Transport Layer

  13. Parallel download from multiple mirror sites • History-based TCP parallel access • Dynamic TCP parallel access

  14. Limitations with current solutions • Hardware dependent • Platform dependent • Complex to setup and configure • Changes to end points

  15. Proposed solution Multiple Path Connections using Connection Relay Servers - MPCCRS

  16. Requirements • Provide multiple path data transmission • Hardware independent • Platform independent • Easy and Quick to setup

  17. Architecture

  18. Implementation Client Communication Set client to forward requests to client proxy

  19. Clientproxy communication • Check in cache • Create MD5 digest • Forward request to SP • Wait for client collector response

  20. Serverproxy communication • Calculate Bandwidths of available paths when started • Create MD5 digest • Select service paths • Fill in packets and send data

  21. CRS and Bandwidth relay server communication

  22. Client collector communication • Collect packets • Assemble data bytes • Store complete data • Communicate with client proxy

  23. Packet data • Application data • Byte range • File name • Packet number • Connection status

  24. Testbed machines

  25. How data collected • Multiple sizes of data • 1,2, & 3 paths

  26. End-to-End Response Time

  27. File size Vs. Avg. transfer rate

  28. Client Collector Processing time

  29. Client Collector Average Process Rates

  30. CRS average process times

  31. Lessons Learnt • It took good amount of time figuring out how to synchronize between the two streams of data • management of shared resources is Complicated. • lot of time was spent on understanding HTTP protocol • Learnt and used lot of socket programming

  32. Future Work • Extend MPC-CRS to run applications using multimedia/streaming protocols • Establishing security and trust between proxy and crs servers • Efficient way to place the servers across the internet to take full advantage of MPC-CRS

  33. Contribution • Studied existing multipath systems • Identified Limitations of existing systems • Built a multipath system that overcomes existing limitations • Architecture and design • Implementation • Performance testing • Documented results • Proposed areas of future work

More Related