US Patent 11775413 Information processing system and information processing method

An information processing system that extracts a specified piece of log data or a specified field that constitutes the specified piece of log data, from a log file in which pieces of log data having different recording formats are mixed, the information processing system includes a format-information recording portion configured to store format information in which a determination condition to identify a recording format of the specified piece of log data is contained, an extraction-condition recording portion configured to store an extraction condition to extract the specified piece of log data or the specified field, and an extraction processing portion configured to extract the specified piece of log data or the specified field, from the log file by using the format information stored in the format-information recording portion and the extraction condition.