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Research and Improvement of Cache Replacement Algorithm in Energy Monitor and Control Platform

Author: LiLiBo
Tutor: PengXinYi
School: South China University of Technology
Course: Applied Computer Technology
Keywords: web cache Cache replacement algorithm Energy consumption monitoring platform Access the consideration
CLC: TP333
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 0
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Abstract


Energy consumption monitoring platform in accordance with the South China University of Campus building energy monitoring system construction technology guide for construction , the completion of the north and south campuses totaling 129 to nearly 1 million square meters of various building energy metering project to achieve the real-time monitoring of energy consumption energy consumption statistics and other functions . The energy consumption of a large amount of data , and the computational complexity , in order to make the access speed of the platform has been optimized , the paper added in the energy consumption monitoring platform cache system ( s ) , thereby reducing the number of times of data access and data computing consumption . Cache replacement algorithm is one of the core of the caching system , its main function is when the cache is full , the process of replacing the old data with new data , which related to the overall performance of the cache system and the utilization of system resources . Different energy consumption data access costs and life-cycle analysis shows that the energy consumption monitoring platform , is very different . Most existing cache replacement algorithm will focus on the timeliness of the data and the frequency of requests , not well for energy consumption monitoring platform . Therefore , this paper proposes cache replacement algorithm based on access to the consideration of the algorithm through rigorous life cycle characteristics of the energy consumption data , to predict the the cache each energy consumption data can be saved with access latency , thus optimizing cache delay saving rate indicators . This paper analyzes the source code of the the Memcached open-source cache system then replace the the Memcached default LRU cache replacement algorithm costs proposed cache replacement algorithm based on access consideration . Finally, the use of track -driven simulation method for performance testing , tracking log file generated by the Web server user access request access sequence , using Apache JMeter request access sequence simulating real users , and record the response time for each request . The test results show that the replacement algorithm proposed in this paper the delay savings rate of 86.2% , nearly 10% than using the default LRU replacement algorithm to enhance performance, outstanding performance , energy consumption monitoring platform .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Memory
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