log4net - log format for reduced disk usage

Here is a log4net output format, which uses slightly less log space than the default:


A small saving per line could make a big difference overall to log space :)




note: the documentation from Apache seems to be incorrect for log4net - as it says to use SSS for milliseconds, whereas log4net uses fff for milliseconds




This is the relevant extract from the log4net configuration:

    <layout type="log4net.Layout.PatternLayout,log4net"> 

     <!-- a reduced format, saves bit of log space: --> 

     <param name="ConversionPattern" value="%date{MM/dd HH:mm:ss,fff}-{%level}-%message%newline"/> 

    </layout>  

EXAMPLE OUTPUT:

BEFORE:

2012-06-05 10:58:40,819 [1] INFO  My App [(null)] - My App - ===star
ting....


AFTER:

06/05 11:17:29,151-{INFO}-My App - ===starting...




This is the full log4net configuration:

  <log4net debug="false"> 

   <!-- Define some output appenders --> 

   <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender,log4net"> 

    <param name="File" value="oLING_SINrenewals.log"/> 

    <param name="AppendToFile" value="true"/> 

    <param name="RollingStyle" value="Size"/> 

    <param name="MaxSizeRollBackups" value="3"/> 

    <param name="MaximumFileSize" value="200KB"/> 

    <param name="StaticLogFileName" value="true"/> 

    <layout type="log4net.Layout.PatternLayout,log4net"> 

     <!-- a reduced format, saves bit of log space: --> 

     <param name="ConversionPattern" value="%date{MM/dd HH:mm:ss,fff}-{%level}-%message%newline"/> 


    </layout> 

   </appender> 

   <!-- Setup the root category, add the appenders and set the default priority --> 

   <root> 

    <priority value="INFO"/> 

    <appender-ref ref="LogFileAppender"/> 

   </root> 

   <!-- Specify the priority for some specific categories --> 

   <category name="OdinCommon"> 

    <priority value="DEBUG"/> 

   </category> 

  </log4net>