Fix a bug in copy() of LogisticRegression that does not infer the penalty cuml parameter

python/src/spark_rapids_ml/classification.py

@@ -396,9 +396,9 @@ class RandomForestClassifier(
             * ``4 or False`` - Enables all messages up to and including information messages.
             * ``5 or True`` - Enables all messages up to and including debug messages.
             * ``6`` - Enables all messages up to and including trace messages.
-    n_streams: int (default = 1)
+    n_streams: int (default = 4)
         Number of parallel streams used for forest building.
-        Please note that there is a bug running spark-rapids-ml on a node with multi-gpus
+        Please note that there could be a bug running spark-rapids-ml on a node with multi-gpus
         when n_streams > 1. See https://github.com/rapidsai/cuml/issues/5402.
     min_samples_split: int or float (default = 2)
         The minimum number of samples required to split an internal node.\n

python/src/spark_rapids_ml/clustering.py

@@ -769,7 +769,6 @@ def __init__(
         assert max_records_per_batch_str is not None
         self.max_records_per_batch = int(max_records_per_batch_str)
         self.BROADCAST_LIMIT = 8 << 30
-        self.verbose = verbose
         self.cuml_params["calc_core_sample_indices"] = False  # currently not supported
 
     def setEps(self: P, value: float) -> P:
@@ -810,7 +809,7 @@ def _fit(self, dataset: DataFrame) -> _CumlModel:
 
         # Create parameter-copied model without accessing the input dataframe
         # All information will be retrieved from Model and transform
-        model = DBSCANModel(verbose=self.verbose, n_cols=0, dtype="")
+        model = DBSCANModel(n_cols=0, dtype="")
 
         model._num_workers = self.num_workers
         self._copyValues(model)
@@ -842,7 +841,6 @@ def __init__(
         self,
         n_cols: int,
         dtype: str,
-        verbose: Union[int, bool],
     ):
         super(DBSCANClass, self).__init__()
         super(_CumlModelWithPredictionCol, self).__init__(n_cols=n_cols, dtype=dtype)
@@ -852,7 +850,6 @@ def __init__(
             idCol=alias.row_number,
         )
 
-        self.verbose = verbose
         self.BROADCAST_LIMIT = 8 << 30
         self._dbscan_spark_model = None
 
@@ -1069,12 +1066,3 @@ def _chunk_arr(
         # JOIN the transformed label column into the original input dataset
         # and discard the internal idCol for row matching
         return dataset.join(pred_df, idCol_name).drop(idCol_name)
-
-    def _get_model_attributes(self) -> Optional[Dict[str, Any]]:
-        """
-        Override parent method to bring broadcast variables to driver before JSON serialization.
-        """
-
-        self._model_attributes["verbose"] = self.verbose
-
-        return self._model_attributes

python/src/spark_rapids_ml/params.py

@@ -128,6 +128,36 @@ def _ensureIdCol(self, df: DataFrame) -> DataFrame:
         return df_withid
 
 
+class VerboseTypeConverters(TypeConverters):
+    @staticmethod
+    def _toIntOrBool(value: Any) -> Union[int, bool]:
+        if isinstance(value, bool):
+            return value
+
+        if TypeConverters._is_integer(value):
+            return int(value)
+
+        raise TypeError("Could not convert %s to Union[int, bool]" % value)
+
+
+class HasVerboseParam(Params):
+    """
+    Parameter to enable displaying verbose messages from cuml.
+    Refer to the cuML documentation for details on verbosity levels.
+    """
+
+    verbose: "Param[Union[int, bool]]" = Param(
+        Params._dummy(),
+        "verbose",
+        "cuml verbosity level (False, True or an integer between 0 and 6).",
+        typeConverter=VerboseTypeConverters._toIntOrBool,
+    )
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._setDefault(verbose=False)
+
+
 class _CumlClass(object):
     """
     Base class for all _CumlEstimator and _CumlModel implemenations.
@@ -215,7 +245,7 @@ def _get_cuml_params_default(self) -> Dict[str, Any]:
         raise NotImplementedError()
 
 
-class _CumlParams(_CumlClass, Params):
+class _CumlParams(_CumlClass, HasVerboseParam, Params):
     """
     Mix-in to handle common parameters for all Spark Rapids ML algorithms, along with utilties
     for synchronizing between Spark ML Params and cuML class parameters.
@@ -269,25 +299,46 @@ def num_workers(self, value: int) -> None:
         self._num_workers = value
 
     def copy(self: P, extra: Optional["ParamMap"] = None) -> P:
+        """
+        Create a copy of the current instance, including its parameters and cuml_params.
+
+        This function extends the default `copy()` method to ensure the `cuml_params` variable
+        is also copied. The default `super().copy()` method only handles `_paramMap` and
+        `_defaultParamMap`.
+
+        Parameters
+        -----------
+        extra : Optional[ParamMap]
+            A dictionary or ParamMap containing additional parameters to set in the copied instance.
+            Note ParamMap = Dict[pyspark.ml.param.Param, Any].
+
+        Returns
+        --------
+        P
+            A new instance of the same type as the current object, with parameters and
+            cuml_params copied.
+
+        Raises
+        -------
+        TypeError
+            If any key in the `extra` dictionary is not an instance of `pyspark.ml.param.Param`.
+        """
         # override this function to update cuml_params if possible
         instance: P = super().copy(extra)
         cuml_params = instance.cuml_params.copy()
 
+        instance._cuml_params = cuml_params
         if isinstance(extra, dict):
             for param, value in extra.items():
                 if isinstance(param, Param):
-                    name = instance._get_cuml_param(param.name, silent=False)
-                    if name is not None:
-                        cuml_params[name] = instance._get_cuml_mapping_value(
-                            name, value
-                        )
+                    instance._set_params(**{param.name: value})
                 else:
                     raise TypeError(
                         "Expecting a valid instance of Param, but received: {}".format(
                             param
                         )
                     )
-        instance._cuml_params = cuml_params
+
         return instance
 
     def _initialize_cuml_params(self) -> None:

python/src/spark_rapids_ml/tree.py

@@ -38,7 +38,13 @@
     RandomForestClassificationModel as SparkRandomForestClassificationModel,
 )
 from pyspark.ml.linalg import Vector
-from pyspark.ml.param.shared import HasFeaturesCol, HasLabelCol
+from pyspark.ml.param.shared import (
+    HasFeaturesCol,
+    HasLabelCol,
+    Param,
+    Params,
+    TypeConverters,
+)
 from pyspark.ml.regression import DecisionTreeRegressionModel
 from pyspark.ml.regression import (
     RandomForestRegressionModel as SparkRandomForestRegressionModel,
@@ -148,8 +154,57 @@ class _RandomForestCumlParams(
     HasFeaturesCols,
     HasLabelCol,
 ):
+
+    n_streams = Param(
+        Params._dummy(),
+        "n_streams",
+        "The n_streams parameter to use for cuml.",
+        typeConverter=TypeConverters.toInt,
+    )
+
+    min_samples_split = Param(
+        Params._dummy(),
+        "min_samples_split",
+        "The min_sample_split parameter to use for cuml.",
+        typeConverter=TypeConverters.toInt,
+    )
+
+    max_samples = Param(
+        Params._dummy(),
+        "max_samples",
+        "The max_samples parameter to use for cuml.",
+        typeConverter=TypeConverters.toFloat,
+    )
+
+    max_leaves = Param(
+        Params._dummy(),
+        "max_leaves",
+        "The max_leaves parameter to use for cuml.",
+        typeConverter=TypeConverters.toInt,
+    )
+
+    min_impurity_decrease = Param(
+        Params._dummy(),
+        "min_impurity_decrease",
+        "The min_impurity_decrease parameter to use for cuml.",
+        typeConverter=TypeConverters.toFloat,
+    )
+
+    max_batch_size = Param(
+        Params._dummy(),
+        "max_batch_size",
+        "The max_batch_size parameter to use for cuml.",
+        typeConverter=TypeConverters.toInt,
+    )
+
     def __init__(self) -> None:
         super().__init__()
+        self._setDefault(n_streams=4)
+        self._setDefault(min_samples_split=2)
+        self._setDefault(max_samples=1.0)
+        self._setDefault(max_leaves=-1)
+        self._setDefault(min_impurity_decrease=0.0)
+        self._setDefault(max_batch_size=4096)
         # restrict default seed to max value of 32-bit signed integer for CuML
         self._setDefault(seed=hash(type(self).__name__) & 0x07FFFFFFF)
 

python/tests/test_approximate_nearest_neighbors.py

@@ -110,6 +110,24 @@ def test_params(default_params: bool) -> None:
     _test_input_setter_getter(ApproximateNearestNeighbors)
 
 
+def test_ann_copy() -> None:
+    from .test_common_estimator import _test_est_copy
+
+    param_list: List[Tuple[Dict[str, Any], Optional[Dict[str, Any]]]] = [
+        ({"k": 38}, {"n_neighbors": 38}),
+        ({"algorithm": "cagra"}, {"algorithm": "cagra"}),
+        ({"metric": "cosine"}, {"metric": "cosine"}),
+        (
+            {"algoParams": {"nlist": 999, "nprobe": 11}},
+            {"algo_params": {"nlist": 999, "nprobe": 11}},
+        ),
+        ({"verbose": True}, {"verbose": True}),
+    ]
+
+    for pair in param_list:
+        _test_est_copy(ApproximateNearestNeighbors, pair[0], pair[1])
+
+
 def test_search_index_params() -> None:
     # test cagra index params and search params
     cagra_index_param: Dict[str, Any] = {

python/tests/test_common_estimator.py

@@ -15,7 +15,7 @@
 #
 
 from abc import ABCMeta
-from typing import Any, Callable, Dict, List, Optional, Tuple, Union
+from typing import Any, Callable, Dict, List, Optional, Tuple, Type, Union
 
 import numpy as np
 import pandas as pd
@@ -345,6 +345,38 @@ def _test_input_setter_getter(est_class: Any) -> None:
         ]
 
 
+def _test_est_copy(
+    Estimator: Type[_CumlEstimator],
+    input_spark_params: Dict[str, Any],
+    cuml_params_update: Optional[Dict[str, Any]],
+) -> None:
+    """
+    This tests the copy() function of an estimator object.
+    For Spark-specific parameters (e.g. enable_sparse_data_optim in LogisticRegression), set cuml_params_update to None.
+    """
+
+    est = Estimator()
+    copy_params = {getattr(est, p): input_spark_params[p] for p in input_spark_params}
+    est_copy = est.copy(copy_params)
+
+    # handle Spark-Rapids-ML-only params
+    if cuml_params_update is None:
+        for param in input_spark_params:
+            assert est_copy.getOrDefault(param) == input_spark_params[param]
+        return
+
+    res_cuml_params = est.cuml_params.copy()
+    res_cuml_params.update(cuml_params_update)
+    assert (
+        est.cuml_params != res_cuml_params
+    ), "please modify cuml_params_update because it does not change the default estimator.cuml_params"
+    assert est_copy.cuml_params == res_cuml_params
+
+    # test init function
+    est_init = Estimator(**input_spark_params)
+    assert est_init.cuml_params == res_cuml_params
+
+
 def test_default_cuml_params() -> None:
     cuml_params = get_default_cuml_parameters([CumlDummy], ["b"])
     spark_params = SparkRapidsMLDummy()._get_cuml_params_default()

python/tests/test_dbscan.py

@@ -108,6 +108,21 @@ def test_params(
     _test_input_setter_getter(DBSCAN)
 
 
+def test_dbscan_copy() -> None:
+    from .test_common_estimator import _test_est_copy
+
+    param_list: List[Dict[str, Any]] = [
+        {"eps": 0.7},
+        {"min_samples": 10},
+        {"metric": "cosine"},
+        {"algorithm": "rbc"},
+        {"max_mbytes_per_batch": 1000},
+        {"verbose": True},
+    ]
+    for param in param_list:
+        _test_est_copy(DBSCAN, param, param)
+
+
 def test_dbscan_basic(
     gpu_number: int, tmp_path: str, caplog: LogCaptureFixture
 ) -> None:

python/tests/test_kmeans.py

@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-from typing import Any, Dict, List, Tuple, Type, TypeVar
+from typing import Any, Dict, List, Optional, Tuple, Type, TypeVar
 
 import numpy as np
 import pyspark
@@ -183,6 +183,22 @@ def test_kmeans_params(
     assert not kmeans_float32._float32_inputs
 
 
+def test_kmeans_copy() -> None:
+    from .test_common_estimator import _test_est_copy
+
+    param_list: List[Tuple[Dict[str, Any], Optional[Dict[str, Any]]]] = [
+        ({"k": 17}, {"n_clusters": 17}),
+        ({"initMode": "random"}, {"init": "random"}),
+        ({"tol": 0.0132}, {"tol": 0.0132}),
+        ({"maxIter": 27}, {"max_iter": 27}),
+        ({"seed": 11}, {"random_state": 11}),
+        ({"verbose": True}, {"verbose": True}),
+    ]
+
+    for pair in param_list:
+        _test_est_copy(KMeans, pair[0], pair[1])
+
+
 def test_kmeans_basic(
     gpu_number: int, tmp_path: str, caplog: LogCaptureFixture
 ) -> None:

python/tests/test_linear_model.py

@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 import warnings
-from typing import Any, Dict, List, Tuple, Type, TypeVar, cast
+from typing import Any, Dict, List, Optional, Tuple, Type, TypeVar, cast
 
 import numpy as np
 import pyspark
@@ -218,6 +218,25 @@ def test_linear_regression_params(
     assert not lr_float32._float32_inputs
 
 
+def test_linear_regression_copy() -> None:
+    from .test_common_estimator import _test_est_copy
+
+    # solver supports 'auto', 'normal' and 'eig', but all of them will be mapped to 'eig' in cuML.
+    # loss supports 'squaredError' only,
+    param_list: List[Tuple[Dict[str, Any], Optional[Dict[str, Any]]]] = [
+        ({"maxIter": 29}, {"max_iter": 29}),
+        ({"regParam": 0.12}, {"alpha": 0.12}),
+        ({"elasticNetParam": 0.23}, {"l1_ratio": 0.23}),
+        ({"fitIntercept": False}, {"fit_intercept": False}),
+        ({"standardization": False}, {"normalize": False}),
+        ({"tol": 0.0132}, {"tol": 0.0132}),
+        ({"verbose": True}, {"verbose": True}),
+    ]
+
+    for pair in param_list:
+        _test_est_copy(LinearRegression, pair[0], pair[1])
+
+
 @pytest.mark.parametrize("data_type", ["byte", "short", "int", "long"])
 def test_linear_regression_numeric_type(gpu_number: int, data_type: str) -> None:
     # reduce the number of GPUs for toy dataset to avoid empty partition