| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide: a traffic recorder capable of performing two steps of retrieval according to a user's request with flexible period specification while targeting traffic information for a long period; a traffic recording method; and a traffic recording program. <P>SOLUTION: A recorder 10, which records traffic information related to packet data to be transmitted and received on a network includes: a summary calculation part 12 which calculates summary of statistics regarding values of a plurality of variables to be extracted from the packet data transmitted and received in preset unit time by every unit time; a summary DB 15 which stores the calculated summary by every plurality of hierarchies having mutually different unit time. The summary calculation part 12 calculates: a value of the first number with high appearance frequency regarding one of the plurality of variables; and a value of the second number with high appearance frequency regarding other variables except the one variable, as the summary, when the one variable is the value concerned. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
