diff --git a/.github/stale.yml b/.github/stale.yml
deleted file mode 100644
index 3d025c987..000000000
--- a/.github/stale.yml
+++ /dev/null
@@ -1,62 +0,0 @@
-# Configuration for probot-stale - https://github.com/probot/stale
-
-# Number of days of inactivity before an Issue or Pull Request becomes stale
-daysUntilStale: 60
-
-# Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
-# Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
-daysUntilClose: 7
-
-# Only issues or pull requests with all of these labels are check if stale. Defaults to `[]` (disabled)
-onlyLabels: []
-
-# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
-exemptLabels:
-  - bug
-  - pinned
-  - security
-  - "[Status] Maybe Later"
-
-# Set to true to ignore issues in a project (defaults to false)
-exemptProjects: false
-
-# Set to true to ignore issues in a milestone (defaults to false)
-exemptMilestones: false
-
-# Set to true to ignore issues with an assignee (defaults to false)
-exemptAssignees: false
-
-# Label to use when marking as stale
-staleLabel: wontfix
-
-# Comment to post when marking as stale. Set to `false` to disable
-markComment: >
-  This issue has been automatically marked as stale because it has not had
-  recent activity. It will be closed if no further activity occurs. Thank you
-  for your contributions.
-
-# Comment to post when removing the stale label.
-# unmarkComment: >
-#   Your comment here.
-
-# Comment to post when closing a stale Issue or Pull Request.
-# closeComment: >
-#   Your comment here.
-
-# Limit the number of actions per hour, from 1-30. Default is 30
-limitPerRun: 30
-
-# Limit to only `issues` or `pulls`
-# only: issues
-
-# Optionally, specify configuration settings that are specific to just 'issues' or 'pulls':
-# pulls:
-#   daysUntilStale: 30
-#   markComment: >
-#     This pull request has been automatically marked as stale because it has not had
-#     recent activity. It will be closed if no further activity occurs. Thank you
-#     for your contributions.
-
-# issues:
-#   exemptLabels:
-#     - confirmed
\ No newline at end of file
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
new file mode 100644
index 000000000..b07bdf1e7
--- /dev/null
+++ b/.github/workflows/stale.yml
@@ -0,0 +1,24 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: "0 0/3 * * *"
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/stale@v3
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue is stale because it has been open for three months with no activity. Remove the stale label or comment on the issue otherwise this will be closed in 5 days'
+        stale-pr-message: 'This PR is stale because it has been open for a year with no activity. Remove the stale label or comment on the PR otherwise this will be closed in 5 days'
+        stale-issue-label: 'stale'
+        stale-pr-label: 'stale'
+        days-before-stale: 90
+        days-before-close: 5
+        operations-per-run: 100
+        exempt-issue-labels: 'bug,enhancement'
+        remove-stale-when-updated: true
\ No newline at end of file
diff --git a/README.md b/README.md
index 84f17ccda..a14ab5c31 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,6 @@ New features under development(order by estimated release time).
 Your feedbacks about the features are very important.
 | Feature                        | Status      |
 | --                      | ------    |
-| Online serving and automatic model rolling | Under review: https://github.com/microsoft/qlib/pull/290 | 
 | Planning-based portfolio optimization | Under review:  https://github.com/microsoft/qlib/pull/280 | 
 | Fund data supporting and analysis  |  Under review: https://github.com/microsoft/qlib/pull/292 |
 | Point-in-Time database | Under review: https://github.com/microsoft/qlib/pull/343 |
@@ -55,6 +54,7 @@ Your feedbacks about the features are very important.
 Recent released features
 | Feature | Status |
 | --                      | ------    |
+| Online serving and automatic model rolling | Released: https://github.com/microsoft/qlib/pull/290 | 
 | DoubleEnsemble Model | Released https://github.com/microsoft/qlib/pull/286 | 
 | High-frequency data processing example | Released https://github.com/microsoft/qlib/pull/257 |
 | High-frequency trading example | Part of code released https://github.com/microsoft/qlib/pull/227 | 
diff --git a/docs/component/data.rst b/docs/component/data.rst
index 3cee803e6..0a650c523 100644
--- a/docs/component/data.rst
+++ b/docs/component/data.rst
@@ -396,8 +396,7 @@ The ``DatasetH`` class is the `dataset` with `Data Handler`. Here is the most im
 API
 ---------
 
-To know more about ``Dataset``, please refer to `Dataset API <../reference/api.html#module-qlib.data.dataset.__init__>`_.
-
+To know more about ``Dataset``, please refer to `Dataset API <../reference/api.html#dataset>`_.
 
 
 Cache
diff --git a/docs/component/recorder.rst b/docs/component/recorder.rst
index 3882161bc..cc425fa8e 100644
--- a/docs/component/recorder.rst
+++ b/docs/component/recorder.rst
@@ -34,6 +34,7 @@ Here is a general view of the structure of the system:
             - Recorder 2
             - ...
         - ...
+        
 This experiment management system defines a set of interface and provided a concrete implementation ``MLflowExpManager``, which is based on the machine learning platform: ``MLFlow`` (`link <https://mlflow.org/>`_). 
 
 If users set the implementation of ``ExpManager`` to be ``MLflowExpManager``, they can use the command `mlflow ui` to visualize and check the experiment results. For more information, pleaes refer to the related documents `here <https://www.mlflow.org/docs/latest/cli.html#mlflow-ui>`_.
diff --git a/examples/benchmarks/LightGBM/workflow_config_lightgbm_configurable_dataset.yaml b/examples/benchmarks/LightGBM/workflow_config_lightgbm_configurable_dataset.yaml
new file mode 100644
index 000000000..335dc2093
--- /dev/null
+++ b/examples/benchmarks/LightGBM/workflow_config_lightgbm_configurable_dataset.yaml
@@ -0,0 +1,81 @@
+qlib_init:
+    provider_uri: "~/.qlib/qlib_data/cn_data"
+    region: cn
+market: &market csi300
+benchmark: &benchmark SH000300
+data_handler_config: &data_handler_config
+    start_time: 2008-01-01
+    end_time: 2020-08-01
+    instruments: *market
+    data_loader:
+        class: QlibDataLoader
+        kwargs:
+            config:
+                feature:
+                    - ["Resi($close, 15)/$close", "Std(Abs($close/Ref($close, 1)-1)*$volume, 5)/(Mean(Abs($close/Ref($close, 1)-1)*$volume, 5)+1e-12)", "Rsquare($close, 5)", "($high-$low)/$open", "Rsquare($close, 10)", "Corr($close, Log($volume+1), 5)", "Corr($close/Ref($close,1), Log($volume/Ref($volume, 1)+1), 5)", "Corr($close, Log($volume+1), 10)", "Rsquare($close, 20)", "Corr($close/Ref($close,1), Log($volume/Ref($volume, 1)+1), 60)", "Corr($close/Ref($close,1), Log($volume/Ref($volume, 1)+1), 10)", "Corr($close, Log($volume+1), 20)", "(Less($open, $close)-$low)/$open"]
+                    - ["RESI5", "WVMA5", "RSQR5", "KLEN", "RSQR10", "CORR5", "CORD5", "CORR10", "RSQR20", "CORD60", "CORD10", "CORR20", "KLOW"]
+                label:
+                    - ["Ref($close, -2)/Ref($close, -1) - 1"]
+                    - ["LABEL0"]
+            freq: day
+
+    learn_processors:
+        - class: DropnaLabel
+        - class: CSZScoreNorm
+          kwargs:
+            fields_group: label
+port_analysis_config: &port_analysis_config
+    strategy:
+        class: TopkDropoutStrategy
+        module_path: qlib.contrib.strategy.strategy
+        kwargs:
+            topk: 50
+            n_drop: 5
+    backtest:
+        verbose: False
+        limit_threshold: 0.095
+        account: 100000000
+        benchmark: *benchmark
+        deal_price: close
+        open_cost: 0.0005
+        close_cost: 0.0015
+        min_cost: 5
+task:
+    model:
+        class: LGBModel
+        module_path: qlib.contrib.model.gbdt
+        kwargs:
+            loss: mse
+            colsample_bytree: 0.8879
+            learning_rate: 0.2
+            subsample: 0.8789
+            lambda_l1: 205.6999
+            lambda_l2: 580.9768
+            max_depth: 8
+            num_leaves: 210
+            num_threads: 20
+    dataset:
+        class: DatasetH
+        module_path: qlib.data.dataset
+        kwargs:
+            handler:
+                class: DataHandlerLP
+                module_path: qlib.data.dataset.handler
+                kwargs: *data_handler_config
+            segments:
+                train: [2008-01-01, 2014-12-31]
+                valid: [2015-01-01, 2016-12-31]
+                test: [2017-01-01, 2020-08-01]
+    record: 
+        - class: SignalRecord
+          module_path: qlib.workflow.record_temp
+          kwargs: {}
+        - class: SigAnaRecord
+          module_path: qlib.workflow.record_temp
+          kwargs: 
+            ana_long_short: False
+            ann_scaler: 252
+        - class: PortAnaRecord
+          module_path: qlib.workflow.record_temp
+          kwargs: 
+            config: *port_analysis_config
\ No newline at end of file
diff --git a/examples/hyperparameter/LightGBM/Readme.md b/examples/hyperparameter/LightGBM/Readme.md
new file mode 100644
index 000000000..320e13828
--- /dev/null
+++ b/examples/hyperparameter/LightGBM/Readme.md
@@ -0,0 +1,23 @@
+# LightGBM hyperparameter
+
+## Alpha158
+First terminal
+```
+optuna create-study --study LGBM_158 --storage sqlite:///db.sqlite3
+optuna-dashboard --port 5000 --host 0.0.0.0 sqlite:///db.sqlite3
+```
+Second terminal
+```
+python hyperparameter_158.py
+```
+
+## Alpha360
+First terminal
+```
+optuna create-study --study LGBM_360 --storage sqlite:///db.sqlite3
+optuna-dashboard --port 5000 --host 0.0.0.0 sqlite:///db.sqlite3
+```
+Second terminal
+```
+python hyperparameter_360.py
+```
diff --git a/examples/hyperparameter/LightGBM/hyperparameter_158.py b/examples/hyperparameter/LightGBM/hyperparameter_158.py
new file mode 100644
index 000000000..5e4887a14
--- /dev/null
+++ b/examples/hyperparameter/LightGBM/hyperparameter_158.py
@@ -0,0 +1,76 @@
+import qlib
+from qlib.config import REG_CN
+from qlib.utils import exists_qlib_data, init_instance_by_config
+import optuna
+
+provider_uri = "~/.qlib/qlib_data/cn_data"
+if not exists_qlib_data(provider_uri):
+    print(f"Qlib data is not found in {provider_uri}")
+    sys.path.append(str(scripts_dir))
+    from get_data import GetData
+
+    GetData().qlib_data(target_dir=provider_uri, region="cn")
+qlib.init(provider_uri=provider_uri, region="cn")
+
+market = "csi300"
+benchmark = "SH000300"
+
+data_handler_config = {
+    "start_time": "2008-01-01",
+    "end_time": "2020-08-01",
+    "fit_start_time": "2008-01-01",
+    "fit_end_time": "2014-12-31",
+    "instruments": market,
+}
+dataset_task = {
+    "dataset": {
+        "class": "DatasetH",
+        "module_path": "qlib.data.dataset",
+        "kwargs": {
+            "handler": {
+                "class": "Alpha158",
+                "module_path": "qlib.contrib.data.handler",
+                "kwargs": data_handler_config,
+            },
+            "segments": {
+                "train": ("2008-01-01", "2014-12-31"),
+                "valid": ("2015-01-01", "2016-12-31"),
+                "test": ("2017-01-01", "2020-08-01"),
+            },
+        },
+    },
+}
+dataset = init_instance_by_config(dataset_task["dataset"])
+
+
+def objective(trial):
+    task = {
+        "model": {
+            "class": "LGBModel",
+            "module_path": "qlib.contrib.model.gbdt",
+            "kwargs": {
+                "loss": "mse",
+                "colsample_bytree": trial.suggest_uniform("colsample_bytree", 0.5, 1),
+                "learning_rate": trial.suggest_uniform("learning_rate", 0, 1),
+                "subsample": trial.suggest_uniform("subsample", 0, 1),
+                "lambda_l1": trial.suggest_loguniform("lambda_l1", 1e-8, 1e4),
+                "lambda_l2": trial.suggest_loguniform("lambda_l2", 1e-8, 1e4),
+                "max_depth": 10,
+                "num_leaves": trial.suggest_int("num_leaves", 1, 1024),
+                "feature_fraction": trial.suggest_uniform("feature_fraction", 0.4, 1.0),
+                "bagging_fraction": trial.suggest_uniform("bagging_fraction", 0.4, 1.0),
+                "bagging_freq": trial.suggest_int("bagging_freq", 1, 7),
+                "min_data_in_leaf": trial.suggest_int("min_data_in_leaf", 1, 50),
+                "min_child_samples": trial.suggest_int("min_child_samples", 5, 100),
+            },
+        },
+    }
+
+    evals_result = dict()
+    model = init_instance_by_config(task["model"])
+    model.fit(dataset, evals_result=evals_result)
+    return min(evals_result["valid"])
+
+
+study = optuna.Study(study_name="LGBM_158", storage="sqlite:///db.sqlite3")
+study.optimize(objective, n_jobs=6)
diff --git a/examples/hyperparameter/LightGBM/hyperparameter_360.py b/examples/hyperparameter/LightGBM/hyperparameter_360.py
new file mode 100644
index 000000000..8b498e912
--- /dev/null
+++ b/examples/hyperparameter/LightGBM/hyperparameter_360.py
@@ -0,0 +1,76 @@
+import qlib
+from qlib.config import REG_CN
+from qlib.utils import exists_qlib_data, init_instance_by_config
+import optuna
+
+provider_uri = "~/.qlib/qlib_data/cn_data"
+if not exists_qlib_data(provider_uri):
+    print(f"Qlib data is not found in {provider_uri}")
+    sys.path.append(str(scripts_dir))
+    from get_data import GetData
+
+    GetData().qlib_data(target_dir=provider_uri, region="cn")
+qlib.init(provider_uri=provider_uri, region="cn")
+
+market = "csi300"
+benchmark = "SH000300"
+
+data_handler_config = {
+    "start_time": "2008-01-01",
+    "end_time": "2020-08-01",
+    "fit_start_time": "2008-01-01",
+    "fit_end_time": "2014-12-31",
+    "instruments": market,
+}
+dataset_task = {
+    "dataset": {
+        "class": "DatasetH",
+        "module_path": "qlib.data.dataset",
+        "kwargs": {
+            "handler": {
+                "class": "Alpha360",
+                "module_path": "qlib.contrib.data.handler",
+                "kwargs": data_handler_config,
+            },
+            "segments": {
+                "train": ("2008-01-01", "2014-12-31"),
+                "valid": ("2015-01-01", "2016-12-31"),
+                "test": ("2017-01-01", "2020-08-01"),
+            },
+        },
+    },
+}
+dataset = init_instance_by_config(dataset_task["dataset"])
+
+
+def objective(trial):
+    task = {
+        "model": {
+            "class": "LGBModel",
+            "module_path": "qlib.contrib.model.gbdt",
+            "kwargs": {
+                "loss": "mse",
+                "colsample_bytree": trial.suggest_uniform("colsample_bytree", 0.5, 1),
+                "learning_rate": trial.suggest_uniform("learning_rate", 0, 1),
+                "subsample": trial.suggest_uniform("subsample", 0, 1),
+                "lambda_l1": trial.suggest_loguniform("lambda_l1", 1e-8, 1e4),
+                "lambda_l2": trial.suggest_loguniform("lambda_l2", 1e-8, 1e4),
+                "max_depth": 10,
+                "num_leaves": trial.suggest_int("num_leaves", 1, 1024),
+                "feature_fraction": trial.suggest_uniform("feature_fraction", 0.4, 1.0),
+                "bagging_fraction": trial.suggest_uniform("bagging_fraction", 0.4, 1.0),
+                "bagging_freq": trial.suggest_int("bagging_freq", 1, 7),
+                "min_data_in_leaf": trial.suggest_int("min_data_in_leaf", 1, 50),
+                "min_child_samples": trial.suggest_int("min_child_samples", 5, 100),
+            },
+        },
+    }
+
+    evals_result = dict()
+    model = init_instance_by_config(task["model"])
+    model.fit(dataset, evals_result=evals_result)
+    return min(evals_result["valid"])
+
+
+study = optuna.Study(study_name="LGBM_360", storage="sqlite:///db.sqlite3")
+study.optimize(objective, n_jobs=6)
diff --git a/examples/hyperparameter/LightGBM/requirements.txt b/examples/hyperparameter/LightGBM/requirements.txt
new file mode 100644
index 000000000..c8b16cefe
--- /dev/null
+++ b/examples/hyperparameter/LightGBM/requirements.txt
@@ -0,0 +1,5 @@
+pandas==1.1.2
+numpy==1.17.4
+lightgbm==3.1.0
+optuna==2.7.0
+optuna-dashboard==0.4.1
diff --git a/qlib/contrib/backtest/position.py b/qlib/contrib/backtest/position.py
index 97abc2a56..09313f933 100644
--- a/qlib/contrib/backtest/position.py
+++ b/qlib/contrib/backtest/position.py
@@ -1,10 +1,10 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
-
-import pandas as pd
 import copy
 import pathlib
+import pandas as pd
+import numpy as np
 from .order import Order
 
 """
diff --git a/qlib/data/dataset/handler.py b/qlib/data/dataset/handler.py
index 63b49d78b..c6338832a 100644
--- a/qlib/data/dataset/handler.py
+++ b/qlib/data/dataset/handler.py
@@ -61,7 +61,7 @@ class DataHandler(Serializable):
         instruments=None,
         start_time=None,
         end_time=None,
-        data_loader: Tuple[dict, str, DataLoader] = None,
+        data_loader: Union[dict, str, DataLoader] = None,
         init_data=True,
         fetch_orig=True,
     ):
@@ -74,7 +74,7 @@ class DataHandler(Serializable):
             start_time of the original data.
         end_time :
             end_time of the original data.
-        data_loader : Tuple[dict, str, DataLoader]
+        data_loader : Union[dict, str, DataLoader]
             data loader to load the data.
         init_data :
             initialize the original data in the constructor.
@@ -305,7 +305,7 @@ class DataHandlerLP(DataHandler):
         instruments=None,
         start_time=None,
         end_time=None,
-        data_loader: Tuple[dict, str, DataLoader] = None,
+        data_loader: Union[dict, str, DataLoader] = None,
         infer_processors=[],
         learn_processors=[],
         process_type=PTYPE_A,
diff --git a/qlib/log.py b/qlib/log.py
index a0e4f7986..379544392 100644
--- a/qlib/log.py
+++ b/qlib/log.py
@@ -165,8 +165,81 @@ class LogFilter(logging.Filter):
         return allow
 
 
-def set_global_logger_level(level: int):
+def set_global_logger_level(level: int, return_orig_handler_level: bool = False):
+    """set qlib.xxx logger handlers level
+
+    Parameters
+    ----------
+    level: int
+        logger level
+
+    return_orig_handler_level: bool
+        return origin handler level map
+
+    Examples
+    ---------
+
+        .. code-block:: python
+
+            import qlib
+            import logging
+            from qlib.log import get_module_logger, set_global_logger_level
+            qlib.init()
+
+            tmp_logger_01 = get_module_logger("tmp_logger_01", level=logging.INFO)
+            tmp_logger_01.info("1. tmp_logger_01 info show")
+
+            global_level = logging.WARNING + 1
+            set_global_logger_level(global_level)
+            tmp_logger_02 = get_module_logger("tmp_logger_02", level=logging.INFO)
+            tmp_logger_02.log(msg="2. tmp_logger_02 log show", level=global_level)
+
+            tmp_logger_01.info("3. tmp_logger_01 info do not show")
+
+    """
+    _handler_level_map = {}
     qlib_logger = logging.root.manager.loggerDict.get("qlib", None)
     if qlib_logger is not None:
         for _handler in qlib_logger.handlers:
+            _handler_level_map[_handler] = _handler.level
             _handler.level = level
+    return _handler_level_map if return_orig_handler_level else None
+
+
+@contextmanager
+def set_global_logger_level_cm(level: int):
+    """set qlib.xxx logger handlers level to use contextmanager
+
+    Parameters
+    ----------
+    level: int
+        logger level
+
+    Examples
+    ---------
+
+        .. code-block:: python
+
+            import qlib
+            import logging
+            from qlib.log import get_module_logger, set_global_logger_level_cm
+            qlib.init()
+
+            tmp_logger_01 = get_module_logger("tmp_logger_01", level=logging.INFO)
+            tmp_logger_01.info("1. tmp_logger_01 info show")
+
+            global_level = logging.WARNING + 1
+            with set_global_logger_level_cm(global_level):
+                tmp_logger_02 = get_module_logger("tmp_logger_02", level=logging.INFO)
+                tmp_logger_02.log(msg="2. tmp_logger_02 log show", level=global_level)
+                tmp_logger_01.info("3. tmp_logger_01 info do not show")
+
+            tmp_logger_01.info("4. tmp_logger_01 info show")
+
+    """
+    _handler_level_map = set_global_logger_level(level, return_orig_handler_level=True)
+    try:
+        yield
+    finally:
+        for _handler, _level in _handler_level_map.items():
+            _handler.level = _level