set monitor sampling interval through json file

mindspore/ccsrc/dataset/core/config_manager.cc

@@ -41,7 +41,7 @@ Status ConfigManager::FromJson(const nlohmann::json &j) {
   set_worker_connector_size(j.value("workerConnectorSize", worker_connector_size_));
   set_op_connector_size(j.value("opConnectorSize", op_connector_size_));
   set_seed(j.value("seed", seed_));
-  set_monitor_sampling_interval(j.value("monitorSamplingInterval"));
+  set_monitor_sampling_interval(j.value("monitorSamplingInterval", monitor_sampling_interval_));
   return Status::OK();
 }
 

mindspore/dataset/core/configuration.py

@@ -186,7 +186,7 @@ class ConfigurationManager:
             >>> #     "workerConnectorSize": 16,
             >>> #     "opConnectorSize": 16,
             >>> #     "seed": 5489,
-            >>> #     "monitorSamplingInterval": 30 
+            >>> #     "monitorSamplingInterval": 30
             >>> # }
         """
         self.config.load(file)

tests/ut/data/dataset/declient.cfg

@@ -5,6 +5,5 @@
    "workerConnectorSize": 16,
    "opConnectorSize": 16,
    "seed": 5489,
-   "monitor_sampling_interval": 15
-
+   "monitorSamplingInterval": 15
 }

tests/ut/python/dataset/test_config.py

@@ -46,7 +46,7 @@ def test_basic():
     # assert ds.config.get_worker_connector_size() == 16
     assert ds.config.get_prefetch_size() == 16
     assert ds.config.get_seed() == 5489
-    # assert ds.config.get_monitor_sampling_interval() == 15
+    assert ds.config.get_monitor_sampling_interval() == 15
 
     # ds.config.set_rows_per_buffer(1)
     ds.config.set_num_parallel_workers(2)