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The Application of Linux Cluster System Based on the Load Balancing Algorithm in Webgis

Author: MaWeiFeng
Tutor: WangJiaHai
School: Liaoning Technical University
Course: Applied Computer Technology
Keywords: Clusters Load balancing LVS Load indicators Dynamic Scheduling
CLC: TP393.05
Type: Master's thesis
Year: 2011
Downloads: 32
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Abstract


With the popularity of computer networks and the rapid growth of the number of network users , the traditional large servers is difficult to meet the demand for high concurrent user access , clustering technology is to solve the problem . Since cluster system has many advantages , such as strong scalability , high availability , so get a wide range of corporate users of all ages . Load balancing is a key part of the cluster system , and is also one of the key factors to improve cluster performance Linux cluster load balancing and load balancing scheduling algorithm . This paper first introduces the development status of the current cluster applications , the evaluation criteria of the cluster , load balancing technology , then describes the general architecture of the cluster software hierarchy , analyzed existing scheduling algorithms and IP-based layer scheduling mode. LVS cluster scheduling algorithm or feedback node load scheduling information , suitable for a small number of users to access . For large-scale , highly concurrent access to low efficiency , relatively poor stability , availability and poor problem still exists . Finally , in the analysis of the original scheduling algorithm exists the algorithm on the basis of insufficient , this paper presents the design of a new scheduling algorithm suitable webgis by collecting really true server load information , and by setting a certain threshold to reasonable dispatch task to achieve the the biggest load balancing . In this paper, the design the set of webgis fleet server system , including cluster architecture , cluster monitoring , laid webgis environment , and apply the new scheduling algorithm , with Loadrunner high concurrent testing , multi-user access , and draw new algorithm by analyzing the test results , the pros and cons .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Network equipment
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