摘要：Mobile web access log file plays an important role in the analysis about demand of mobile terminal market or user behavior. However, the log file data is highly dimensional, disorganized and semi-structured, which heightens the difficulty of data extracting accuracy; while it generates and transmits continuously, which poses an extracting efficiency challenge. It is highly desirable to extract the information embedded in log files as disorder or hidden situation efficiently and accurately. This paper proposes an efficient extracting method for mobile web access log with cache strategy. Firstly of all, data dictionary sets are built for each kind of complex field before extracting. Then, data is extracted based on the dictionaries, and the dictionaries will be completed simultaneously. Furthermore, with the discovery of the distribution of some data in the log generally following Zipf-like distribution, cache strategy is considered to be an auxiliary way to reduce mapping time. In addition, the classical cache strategy LFU is chosen. Ultimately, the experiment shows that the data could be extracted from the log accurately, and the extracting efficiency speeds up remarkably with LFU cache strategy.
其他关键词：Data extraction, mobile web access log, data dictionary, cache strategy, Zipf-like distribution.
