if (commandLine.hasOption(CLIManager.LOG_FILE)) {
            File logFile = new File(commandLine.getOptionValue(CLIManager.LOG_FILE));
            logFile = ResolveFile.resolveFile(logFile, cliRequest.workingDirectory);

            // redirect stdout and stderr to file
            try {
                PrintStream ps = new PrintStream(new FileOutputStream(logFile));
                System.setOut(ps);

# Whether to use a log file for search logging.
logging.search.use.logfile=true
# Maximum queue size for search logging.
logging.search.max.queue.size=10000
# Maximum queue size for click logging.
logging.click.max.queue.size=10000