How to use Log operator within RapidMiner server process

kypexin

Hi rapidminers,

I have a trouble with using Log operator in the process which I run on RapidMiner server. I want to log some parameters from Optimize Parameters operator in a standard way to compare performance for, like, 20 iterations.
The operator offers to specify a filename but it is a path on the local machine only. If I run the process on the server, the local path is not resolved and no log file is written finally.
Any hint about how to write log file from within a server process?

Marco_Boeck

Hi,

you don't need to write it to a file, it's optional. You can create an ExampleSet from it instead. See the following example process:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="6.6.000-SNAPSHOT">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="6.6.000-SNAPSHOT" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="retrieve" compatibility="6.6.000-SNAPSHOT" expanded="true" height="60" name="Retrieve Deals" width="90" x="45" y="30">
        <parameter key="repository_entry" value="//Samples/data/Deals"/>
      </operator>
      <operator activated="true" class="log" compatibility="6.6.000-SNAPSHOT" expanded="true" height="76" name="Log" width="90" x="179" y="30">
        <list key="log">
          <parameter key="test" value="operator.Retrieve Deals.parameter.repository_entry"/>
        </list>
      </operator>
      <operator activated="true" class="log_to_data" compatibility="6.6.000-SNAPSHOT" expanded="true" height="94" name="Log to Data" width="90" x="313" y="30">
        <parameter key="log_name" value="Log"/>
      </operator>
      <connect from_op="Retrieve Deals" from_port="output" to_op="Log" to_port="through 1"/>
      <connect from_op="Log" from_port="through 1" to_op="Log to Data" to_port="through 1"/>
      <connect from_op="Log to Data" from_port="exampleSet" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

Regards,
Marco

kypexin

Thanks a lot Marco, that's what I exactly needed.