| Issue |
MATEC Web of Conferences
Volume 22, 2015
International Conference on Engineering Technology and Application (ICETA 2015)
|
|
|---|---|---|
| Article Number | 02029 | |
| Number of page(s) | 6 | |
| Section | Electric and Electronic Engineering | |
| DOI | https://doi.org/10.1051/matecconf/20152202029 | |
| Published online | 09 July 2015 | |
Optimization of Distributed Crawler under Hadoop
College of Electronic Science & Engineering, National University of Defense Technology, Changsha, Hunan, China
* Corresponding author: x.c.zhang@outlook.com
Web crawler is an important link in the data acquisition of the World Wide Web. It is necessary to optimize traditional methods so as to meet the current needs in the face of the explosive growth of data. This paper introduces the process and the model of the current distributed crawler based on Hadoop, analyzes reasons for influencing the crawling efficiency, and points out defects of the parameter setting, the Urls distribution and the operating model of distributed crawler. The working efficiency is improved through the optimization of parameters configuration and the optimizing effect is further enhanced through the model modification. The experiment indicates that the working efficiency of the distributed crawler after the optimization is increased by 23%, which achieves the expected result.
Key words: Hadoop / Nutch / distributed crawler
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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