diff --git a/tests/scripts/e2e.sh b/tests/scripts/e2e.sh
index 7fb85a7ecc..e336f450cc 100755
--- a/tests/scripts/e2e.sh
+++ b/tests/scripts/e2e.sh
@@ -17,7 +17,7 @@ set -x
 MILVUS_HELM_RELEASE_NAME="${MILVUS_HELM_RELEASE_NAME:-milvus-testing}"
 MILVUS_CLUSTER_ENABLED="${MILVUS_CLUSTER_ENABLED:-false}"
 MILVUS_HELM_NAMESPACE="${MILVUS_HELM_NAMESPACE:-default}"
-PARALLEL_NUM="${PARALLEL_NUM:-4}"
+PARALLEL_NUM="${PARALLEL_NUM:-3}"
 MILVUS_CLIENT="${MILVUS_CLIENT:-pymilvus}"
 
 SOURCE="${BASH_SOURCE[0]}"
@@ -68,10 +68,10 @@ pushd "${ROOT}/tests/docker"
   else
     if [[ "${MILVUS_CLIENT}" == "pymilvus" ]]; then
       export MILVUS_PYTEST_WORKSPACE="/milvus/tests/python_test"
-      docker-compose run --rm pytest /bin/bash -c "pytest -n auto --ip ${MILVUS_SERVICE_IP} --port ${MILVUS_SERVICE_PORT} ${@:-}"
+      docker-compose run --rm pytest /bin/bash -c "pytest -n ${PARALLEL_NUM} --ip ${MILVUS_SERVICE_IP} --port ${MILVUS_SERVICE_PORT} ${@:-}"
     elif [[ "${MILVUS_CLIENT}" == "pymilvus-orm" ]]; then
       export MILVUS_PYTEST_WORKSPACE="/milvus/tests20/python_client"
-      docker-compose run --rm pytest /bin/bash -c "pytest -n auto --host ${MILVUS_SERVICE_IP} --port ${MILVUS_SERVICE_PORT} \
+      docker-compose run --rm pytest /bin/bash -c "pytest -n ${PARALLEL_NUM} --host ${MILVUS_SERVICE_IP} --port ${MILVUS_SERVICE_PORT} \
                                                --html=\${CI_LOG_PATH}/report.html --self-contained-html ${@:-}"
     fi
   fi
diff --git a/tests20/python_client/common/common_type.py b/tests20/python_client/common/common_type.py
index da1d9b4aff..a3307069eb 100644
--- a/tests20/python_client/common/common_type.py
+++ b/tests20/python_client/common/common_type.py
@@ -13,6 +13,7 @@ default_top_k = 10
 default_nq = 2
 default_limit = 10
 default_search_params = {"metric_type": "L2", "params": {"nprobe": 10}}
+default_index = {"index_type": "IVF_SQ8", "metric_type": "L2", "params": {"nlist": 64}}
 max_top_k = 16384
 max_partition_num = 4096  # 256
 default_segment_row_limit = 1000
diff --git a/tests20/python_client/scale/constants.py b/tests20/python_client/scale/constants.py
index 340b936c00..c8c88248ed 100644
--- a/tests20/python_client/scale/constants.py
+++ b/tests20/python_client/scale/constants.py
@@ -11,4 +11,4 @@ QUERY_NODE = "queryNode"
 
 # my values.yaml path
 MILVUS_CHART_ENV = 'MILVUS_CHART_ENV'
-MILVUS_CHART = '/home/zong/milvus-helm/charts/milvus'
+MILVUS_CHART_PATH = '/home/zong/milvus-helm/charts/milvus'
diff --git a/tests20/python_client/scale/helm_env.py b/tests20/python_client/scale/helm_env.py
index 72656a967b..3e69802ac8 100644
--- a/tests20/python_client/scale/helm_env.py
+++ b/tests20/python_client/scale/helm_env.py
@@ -38,7 +38,10 @@ class HelmEnv:
                       f'{self.release_name} . '
         log.debug(f'install_cmd: {install_cmd}')
         log.debug(f'MILVUS CHART: {sc.get_milvus_chart_env_var()}')
-        os.system(f'cd {sc.get_milvus_chart_env_var()} && {install_cmd}')
+        try:
+            os.system(f'cd {sc.get_milvus_chart_env_var()} && {install_cmd}')
+        except Exception as e:
+            raise
         # raise Exception("Failed to deploy cluster milvus")
         #     todo
         #   return svc ip
@@ -102,4 +105,4 @@ if __name__ == '__main__':
     # env.helm_install_cluster_milvus()
     # env.helm_upgrade_cluster_milvus(queryNode=2)
     env.helm_uninstall_cluster_milvus()
-    sleep(5)
+    sleep(5)
\ No newline at end of file
diff --git a/tests20/python_client/scale/scale_common.py b/tests20/python_client/scale/scale_common.py
index a88e43251f..d5b51c7955 100644
--- a/tests20/python_client/scale/scale_common.py
+++ b/tests20/python_client/scale/scale_common.py
@@ -1,7 +1,12 @@
 import os
 
+from pymilvus_orm import connections, Index
+
 from scale import constants
 from utils.util_log import test_log as log
+from base.collection_wrapper import ApiCollectionWrapper
+from common import common_func as cf
+from common import common_type as ct
 
 
 def get_milvus_chart_env_var(var=constants.MILVUS_CHART_ENV):
@@ -10,6 +15,44 @@ def get_milvus_chart_env_var(var=constants.MILVUS_CHART_ENV):
         milvus_helm_chart = os.environ[var]
         return str(milvus_helm_chart)
     except Exception as e:
-        milvus_helm_chart = constants.MILVUS_CHART
-        log.warning(f"Failed to get environment variables: {var}, use default: {milvus_helm_chart}, error: {str(e)}")
-        return milvus_helm_chart
+        milvus_helm_chart = constants.MILVUS_CHART_PATH
+        log.warning(
+            f"Failed to get environment variables: {var}, use default: {constants.MILVUS_CHART_PATH}, {str(e)}")
+    if not os.path.exists(milvus_helm_chart):
+        raise Exception(f'milvus_helm_chart: {milvus_helm_chart} not exist')
+    return milvus_helm_chart
+
+
+def e2e_milvus(host, c_name):
+    # connect
+    connections.add_connection(default={"host": host, "port": 19530})
+    connections.connect(alias='default')
+
+    # create
+    # c_name = cf.gen_unique_str(prefix)
+    collection_w = ApiCollectionWrapper()
+    collection_w.init_collection(name=c_name, schema=cf.gen_default_collection_schema())
+    # collection_w.init_collection(name=c_name)
+
+    # insert
+    data = cf.gen_default_list_data(ct.default_nb)
+    mutation_res, _ = collection_w.insert(data)
+    assert mutation_res.insert_count == ct.default_nb
+
+    # create index
+    collection_w.create_index(ct.default_float_vec_field_name, ct.default_index)
+    assert collection_w.has_index()[0]
+    assert collection_w.index()[0] == Index(collection_w.collection, ct.default_float_vec_field_name,
+                                            ct.default_index)
+
+    # search
+    collection_w.load()
+    search_res, _ = collection_w.search(data[-1][:ct.default_nq], ct.default_float_vec_field_name,
+                                        ct.default_search_params, ct.default_limit)
+    assert len(search_res[0]) == ct.default_limit
+
+    # query
+    ids = search_res[0].ids[0]
+    term_expr = f'{ct.default_int64_field_name} in [{ids}]'
+    query_res, _ = collection_w.query(term_expr, output_fields=["*", "%"])
+    assert query_res[0][ct.default_int64_field_name] == ids
\ No newline at end of file
diff --git a/tests20/python_client/scale/test_index_node_scale.py b/tests20/python_client/scale/test_index_node_scale.py
index d18c2dc277..a36d8eaecb 100644
--- a/tests20/python_client/scale/test_index_node_scale.py
+++ b/tests20/python_client/scale/test_index_node_scale.py
@@ -29,9 +29,10 @@ class TestIndexNodeScale:
         release_name = "scale-index"
         env = HelmEnv(release_name=release_name)
         env.helm_install_cluster_milvus()
+        host = env.get_svc_external_ip()
 
         # connect
-        connections.add_connection(default={"host": '10.98.0.8', "port": 19530})
+        connections.add_connection(default={"host": host, "port": 19530})
         connections.connect(alias='default')
 
         data = cf.gen_default_dataframe_data(nb)
diff --git a/tests20/python_client/scale/test_proxy_scale.py b/tests20/python_client/scale/test_proxy_scale.py
index e69de29bb2..92639abb3d 100644
--- a/tests20/python_client/scale/test_proxy_scale.py
+++ b/tests20/python_client/scale/test_proxy_scale.py
@@ -0,0 +1,64 @@
+import pytest
+
+from scale.helm_env import HelmEnv
+from common import common_func as cf
+from common import common_type as ct
+from common.common_type import CaseLabel
+from scale import scale_common as sc
+from scale import constants
+
+prefix = "proxy_scale"
+
+
+class TestProxyScale:
+
+    @pytest.mark.tags(CaseLabel.L3)
+    def test_expand_proxy(self):
+        """
+        target: test milvus operation after proxy expand
+        method: 1.deploy two proxy pods
+                2.milvus e2e test
+                3.expand proxy pod from 1 to 2
+                4.milvus e2e test
+        expected: 1.verify data consistent and func work
+        """
+        # deploy all nodes one pod cluster milvus with helm
+        release_name = "scale-proxy"
+        env = HelmEnv(release_name=release_name)
+        env.helm_install_cluster_milvus()
+        host = env.get_svc_external_ip()
+        # host = "10.98.0.8"
+
+        c_name = cf.gen_unique_str(prefix)
+        sc.e2e_milvus(host, c_name)
+
+        # scale proxy
+        env.helm_upgrade_cluster_milvus(proxy=2)
+
+        c_name_2 = cf.gen_unique_str(prefix)
+        sc.e2e_milvus(host, c_name_2)
+
+    def test_shrink_proxy(self):
+        """
+        target: test shrink proxy pod from 2 to 1
+        method: 1.deploy two proxy node
+                2.e2e test
+                3.shrink proxy pods
+                4.e2e test
+        expected:
+        """
+        # deploy all nodes one pod cluster milvus with helm
+        release_name = "scale-proxy"
+        env = HelmEnv(release_name=release_name, proxy=2)
+        env.helm_install_cluster_milvus()
+        host = env.get_svc_external_ip()
+        # host = "10.98.0.8"
+
+        c_name = cf.gen_unique_str(prefix)
+        sc.e2e_milvus(host, c_name)
+
+        # scale proxy
+        env.helm_upgrade_cluster_milvus(proxy=1)
+
+        c_name_2 = cf.gen_unique_str(prefix)
+        sc.e2e_milvus(host, c_name_2)
\ No newline at end of file
diff --git a/tests20/python_client/scale/test_query_node_scale.py b/tests20/python_client/scale/test_query_node_scale.py
index 47f1782bf1..29d1e91516 100644
--- a/tests20/python_client/scale/test_query_node_scale.py
+++ b/tests20/python_client/scale/test_query_node_scale.py
@@ -27,9 +27,10 @@ class TestQueryNodeScale:
         release_name = "scale-query"
         env = HelmEnv(release_name=release_name)
         env.helm_install_cluster_milvus()
+        host = env.get_svc_external_ip()
 
         # connect
-        connections.add_connection(default={"host": '10.98.0.8', "port": 19530})
+        connections.add_connection(default={"host": host, "port": 19530})
         connections.connect(alias='default')
 
         # create