logback/cluster.xml

<?xml version="1.0" encoding="UTF-8"?>

<configuration scan="true" scanPeriod="60 seconds">
 <appender name="A1" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${storm.home}/logs/${logfile.name}</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
      <fileNamePattern>${storm.home}/logs/${logfile.name}.%i</fileNamePattern>
      <minIndex>1</minIndex>
      <maxIndex>9</maxIndex>
    </rollingPolicy>

    <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
      <maxFileSize>100MB</maxFileSize>
    </triggeringPolicy>

    <encoder>
      <pattern>%d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n</pattern>
    </encoder>
  </appender> 

  <root level="INFO">
    <appender-ref ref="A1"/>
  </root>
</configuration>