text: pai -name easy_rec_ext
  -Dconfig=oss://{OSS_BUCKET_NAME}/{EXP_NAME}/configs/mmoe_demo.config
  -Dcmd=export
  -Dexport_dir=oss://{OSS_BUCKET_NAME}/{EXP_NAME}/mmoe/savemodel/
  -Dcluster='{"worker" : {"count":1, "cpu":1000, "memory":40000}}'
  -Darn={ROLEARN}
  -Dbuckets=oss://{OSS_BUCKET_NAME}/
  -DossHost={OSS_ENDPOINT}
  ;
  