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

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
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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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