Dissertation > Excellent graduate degree dissertation topics show

Perception-based Congestion Control Mechanism for Distributed File System

Author: YaoYingYing
Tutor: ShiZhan
School: Huazhong University of Science and Technology
Course: Computer System Architecture
Keywords: Distributed File System Retransmission Over Timeout Congestion Control
CLC: TP393.06
Type: Master's thesis
Year: 2013
Downloads: 4
Quote: 0
Read: Download Dissertation

Abstract


In the distribute file system, one data server needs to handle I/O access requests fromplenty of clients at the same time. If the data server does not have enough resources tohandle all the requests arrived and requests that are about to reach, a large number of I/Oaccess requests will be suspended in the data server side, giving rise to congestion.Furthermore, this will lead to severe data server performance degradation. Meanwhile, thedegree of congestion would be enlarged by retransmission over timeout, resulting in dataserver’s throughput decreasing to a small part of its original processing capability. Itbecomes important that how to handle the congestion due to overload and avoid the rapiddecrease of system’s performance, availability and throughput.Taking account the characteristic of distributed file system, this paper proposes acongestion control scheme PbCCM(Perception-based Congestion Control Mechanism).Firstly a high concurrent processing model is designed and implemented which is helpfulto improve service capability of the system, delaying the critical point of the congestion.Then a kind of feedback mechanism between the client and server is introduced, the servercan notify its status to the client when it is overloaded. Then the client will takeappropriate measures to adapt to the data server’s load, gradually reducing the load on thedata server. Finally, additional overhead with the retransmission can be cut down byoptimizing retransmitted write requests.Test results show that, compared with no congestion control scheme of distributedfile system, in the situation of data server congestion, PbCCM can effectively guaranteethe system service performance, mainly reflected in reducing7%~20%of the I/O requestaverage response time and improving25%of the system I/O throughput rate, and greatlydecreasing relatively30%of the request timeout retransmission rate in the situation whenI/O requests can’t get timely response.

Related Dissertations

  1. The Research of TCP Congestion Control Mechanisms in Satallite Networks,TN927.2
  2. The Research and Application of IPTV Terminal System Based on the Next Generation of Internet,TN949.292
  3. Study on Network Congestion Control Method Based on TCP/IP Protocol,TP393.06
  4. Jointly Optimal Power Control and Congestion Control for Ad Hoc Networks,TN929.5
  5. The Design and Implementation of End-to-end Reliable Transmission System Based on IP Multicast,TP393.09
  6. Active Queue Management of Wireless Access Network,TN925.93
  7. Research on Congestion Control Mechanism of Stream Control Transmission Protocol,TN915.04
  8. Research on Trusted Network Congestion Control Based on AQM,TP393.06
  9. Research on the Quality of Service Technology in IP Network,TN915.09
  10. Research and Improvement of the Congestion Control Algorithm Based on Queuing Delay and Explicit Feedback,TP393.06
  11. Research of Reliable Multicast Protocol Based on Hybrid Bus-ring Architecture,TP393.04
  12. Research of Congestion Control Algorithm in Trustworthy Network,TP393.08
  13. Design and Implimention of Metadata Server High Availability in Distributed File System,TP368.5
  14. Congestion Control Strategies Based on Minority Game with Local Information,O225
  15. Weak consistency of distributed data maintenance strategy study,TP311.13
  16. Optimization algorithm based on network congestion control method,TP393.06
  17. Reduce congestion rate and support resources balanced use of new optical networking research,TN929.1
  18. Research of Internet Congestion Control Mechanism and Stability Analysis,TP393.06
  19. Robust research AQM network congestion control algorithm,TP393.06
  20. Research active queue management algorithm based on control theory,TP393.06
  21. Intelligent robust AQM algorithm and its equity research,TP393.06

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer networks, test , run
© 2012 www.DissertationTopic.Net  Mobile