I got it to work. Apparently my code was missing the definition of the rolling policy. However, the logfile is not archived even when its size exceeds the specified max. size. Here is the relevant code snippet: [...] fileAppender.setFile("C:\\log\\log.txt"); FixedWindowRollingPolicy fwRollingPolicy = new FixedWindowRollingPolicy(); fwRollingPolicy.setContext(loggerContext); fwRollingPolicy.setFileNamePattern(""C:\\log\\log-%i.txt.zip"); fwRollingPolicy.setMinIndex(1); fwRollingPolicy.setMaxIndex(3); fwRollingPolicy.setParent(fileAppender); fwRollingPolicy.start(); SizeBasedTriggeringPolicy<ILoggingEvent> triggeringPolicy = new SizeBasedTriggeringPolicy<ILoggingEvent>(); triggeringPolicy.setMaxFileSize("4KB"); triggeringPolicy.start(); [...] fileAppender.setRollingPolicy(fwRollingPolicy); fileAppender.setTriggeringPolicy(triggeringPolicy); fileAppender.start(); [...] Any suggestions on this? Thanx -- View this message in context: http://logback.10977.n7.nabble.com/Setting-the-log-file-file-size-with-Rolli... Sent from the Users mailing list archive at Nabble.com.