How to use Log operator within RapidMiner server process

kypexinkypexin Moderator, RapidMiner Certified Analyst, Member Posts: 291 Unicorn
edited November 2018 in Help
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_BoeckMarco_Boeck Administrator, Moderator, Employee, Member, University Professor Posts: 1,985 RM Engineering

    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">
      <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 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"/>
          <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"/>
          <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"/>
  • kypexinkypexin Moderator, RapidMiner Certified Analyst, Member Posts: 291 Unicorn
    Thanks a lot Marco, that's what I exactly needed.
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