CODEWITHSUNDEEP
optaplanner
Mitch
Mitch

Reputation: 1039

OptaPlanner - how to specify multiple algorithms

The OptaPlanner user guide (http://docs.jboss.org/optaplanner/release/6.4.0.Final/optaplanner-docs/html_single/index.html#whichOptimizationAlgorithmsShouldIUse) mentions "combining multiple algorithms together".

How do you specifiy that in the configuration file? The XML does not allow more than one localSearchType element. I tried a run with 

<acceptor>
  <entityTabuSize>7</entityTabuSize>
  <lateAcceptanceSize>200</lateAcceptanceSize>
  <simulatedAnnealingStartingTemperature>0hard/500soft</simulatedAnnealingStartingTemperature>
</acceptor>

and it ran, but I'm not sure what algorithms were used.

Upvotes: 0

Views: 219

Answers (2)

Geoffrey De Smet
Geoffrey De Smet

Reputation: 27312

You can combine LS's and also sequence them.

Combine:

<acceptor>
  <entityTabuSize>7</entityTabuSize>
  <lateAcceptanceSize>200</lateAcceptanceSize>
</acceptor>
// with acceptedCounLimit 1 => LA with a bit of tabu

Sequence

<localSearch>
  <termination>...</termination>
  <acceptor>
    <lateAcceptanceSize>200</lateAcceptanceSize>
  </acceptor>
  ...
</localSearch>
<localSearch>
  <acceptor>
    <entityTabuSize>7</entityTabuSize>
  </acceptor>
  ...
</localSearch>
// First LA, then TS

Upvotes: 1

Mitch
Mitch

Reputation: 1039

Apparently, you can use a sequence of localSearch sections.

Upvotes: 0

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