抄録
Recently, computer systems are popularly composed of two or more computer servers connected via LAN, where each computer server individually serves a specific function. The computer system provides the required service by the combination of individual server operations. The computer system records many events into a system log file. The log file is recorded the messages generated by specified software operation records. However, the detailed notations are not strictly defined. Therefore, actual descriptions as well as the definition of logs include many discrepancies in the log files. Such problem like syntax analysis is more serious in evolutionary search. If the elements of operands are automatically extracted from the log file with regular expression, GP search results in the explosive size of tree including some partial same structure recursively. In order to avoid such environment, we propose a similarity detection technique in the target words.
