<appender name="biz_log"  class="ch.qos.logback.classic.sift.SiftingAppender">
	<!--discriminator鉴别器，根据taskId这个key对应的value鉴别日志事件，然后委托给具体appender写日志-->
	<discriminator>
		 <!-- MDC的键 -->
		<Key>tag</Key>
		 <!-- MDC的默认值 -->
		<DefaultValue>biz</DefaultValue>
	</discriminator>
	<sift>
		<appender name="${tag}" class="ch.qos.logback.core.rolling.RollingFileAppender">
			<!-- 正在记录的日志文件的路径及文件名 -->
	        <file>${LOG_BIZ_FILE}/${tag}/${APP_NAME}-${tag}.log</file>
	        <encoder>
	            <pattern>%msg%n</pattern>
	            <charset>UTF-8</charset>
	        </encoder>
	        <!-- 基于时间的分包策略 -->
	        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
	            <fileNamePattern>${LOG_BIZ_FILE}/${tag}/${APP_NAME}-${tag}.%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern>
	            <maxHistory>${LOG_FILEMAXDAY}</maxHistory>
	             <!--保留时间,单位:天-->
	            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
	                <maxFileSize>${LOG_MAXFILESIZE}</maxFileSize>
	            </timeBasedFileNamingAndTriggeringPolicy>
	        </rollingPolicy>
	        <filter class="ch.qos.logback.classic.filter.LevelFilter">
	            <level>INFO</level>
   			 </filter>
    	</appender>
    </sift>
</appender>