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| layout: global | |
| title: Advanced topics - spark.ml | |
| displayTitle: Advanced topics - spark.ml | |
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| # Optimization of linear methods | |
| The optimization algorithm underlying the implementation is called | |
| [Orthant-Wise Limited-memory | |
| QuasiNewton](http://research-srv.microsoft.com/en-us/um/people/jfgao/paper/icml07scalable.pdf) | |
| (OWL-QN). It is an extension of L-BFGS that can effectively handle L1 | |
| regularization and elastic net. |