diff --git a/tests-deprecating/milvus_benchmark/milvus_benchmark/metrics/models/metric.py b/tests-deprecating/milvus_benchmark/milvus_benchmark/metrics/models/metric.py
index ea38009bb0..1c2ef99537 100644
--- a/tests-deprecating/milvus_benchmark/milvus_benchmark/metrics/models/metric.py
+++ b/tests-deprecating/milvus_benchmark/milvus_benchmark/metrics/models/metric.py
@@ -8,6 +8,85 @@ from .hardware import Hardware
 
 
 class Metric(object):
+    """
+    A template for reporting data:
+
+    {
+        "_id" : ObjectId("6126865855aba6fb8e742f05"),
+        "_version" : "0.1",
+        "_type" : "case",
+        "run_id" : NumberInt(1629914593),
+        "mode" : "local",
+        "server" : {
+            "id" : ObjectId("6126865855aba6fb8e742f04"),
+            "value" : {
+                "_version" : "0.1",
+                "_type" : "server",
+                "version" : "2.0.0-RC5",
+                "mode" : "single",
+                "build_commit" : null,
+                "deploy_opology" : {
+                    "server" : {
+                        "server_tag" : "8c16m"
+                    },
+                    "milvus" : {
+                        "deploy_mode" : "single"
+                    }
+                }
+            }
+        },
+        "hardware" : {
+            "id" : ObjectId("60f078c5d8aad7192f9baf80"),
+            "value" : {
+                "_version" : "0.1",
+                "_type" : "hardware",
+                "name" : "server_tag",
+                "cpus" : 0.0
+            }
+        },
+        "env" : {
+            "id" : ObjectId("604b54df90fbee981a6ed81d"),
+            "value" : {
+                "_version" : "0.1",
+                "_type" : "env",
+                "server_config" : null,
+                "OMP_NUM_THREADS" : null
+            }
+        },
+        "status" : "RUN_SUCC",
+        "err_message" : "",
+        "collection" : {
+            "dimension" : NumberInt(128),
+            "metric_type" : "l2",
+            "dataset_name" : "sift_128_euclidean"
+        },
+        "index" : {
+            "index_type" : "ivf_sq8",
+            "index_param" : {
+                "nlist" : NumberInt(1024)
+            }
+        },
+        "search" : {
+            "nq" : NumberInt(10000),
+            "topk" : NumberInt(10),
+            "search_param" : {
+                "nprobe" : NumberInt(1)
+            },
+            "filter" : [
+
+            ]
+        },
+        "run_params" : null,
+        "metrics" : {
+            "type" : "ann_accuracy",
+            "value" : {
+                "acc" : 0.377
+            }
+        },
+        "datetime" : "2021-08-25 18:03:13.820593",
+        "type" : "metric"
+    }
+    """
     def __init__(self):
         self._version = '0.1'
         self._type = 'metric'
diff --git a/tests-deprecating/milvus_benchmark/milvus_benchmark/runners/accuracy.py b/tests-deprecating/milvus_benchmark/milvus_benchmark/runners/accuracy.py
index 0ec2a1aaae..1abd0ec8c5 100644
--- a/tests-deprecating/milvus_benchmark/milvus_benchmark/runners/accuracy.py
+++ b/tests-deprecating/milvus_benchmark/milvus_benchmark/runners/accuracy.py
@@ -25,6 +25,7 @@ class AccuracyRunner(BaseRunner):
         vector_type = utils.get_vector_type(data_type)
         index_field_name = utils.get_default_field_name(vector_type)
         base_query_vectors = utils.get_vectors_from_binary(utils.MAX_NQ, dimension, data_type)
+        # collection_info and index_info are used to report
         collection_info = {
             "dimension": dimension,
             "metric_type": metric_type,