Hi! I have been playing with logback for a couple of days and find a lot of its functionality amazing! I have a couple of questions that I was wondering if I could address! I'm using logback to log information about a java server that I'm setting up. I want my log files to change every half hour and to never exceed 500MB. I would also like the logging system to cache 16MB of data before flushing to disk! Finally, I want the fileNamePattern to depend on the hostname where I'm running the server! So this are my questions: a. I have found a way for the log files to change every hour, but not every half hour... Is there a way to do this? Is there a way I can define my own RollingPolicy? b. Is there a way for me to define the fileNamePattern somewhere else other than in the logback.xml file? c. Is there a flush() function I can call when my server exists? For b. I have tried something like: LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory(); Logger logger = lc.getLogger("ROOT"); RollingFileAppender<ILoggingEvent> app = (RollingFileAppender<ILoggingEvent>)logger.getAppender("RootFileAppender"); RollingPolicyBase rollingPolicy = (RollingPolicyBase)app.getRollingPolicy(); rollingPolicy.stop(); rollingPolicy.setFileNamePattern("bidderserver-%d{yyyy-MM-dd-HH:mm:ss}-"+hostname+"-ip.%i.log"); rollingPolicy.start(); But that doesn't seem to work :( I'm attaching my current logback.xml file. Any and all help would be much appreciated! Also, I tried visiting #qos.ch in freenode, but there's noone there except me! Thanks again, Daniel