diff --git a/deployment/helm/datamate/charts/ray-cluster/values.yaml b/deployment/helm/datamate/charts/ray-cluster/values.yaml
index 9e7c650..0a57504 100644
--- a/deployment/helm/datamate/charts/ray-cluster/values.yaml
+++ b/deployment/helm/datamate/charts/ray-cluster/values.yaml
@@ -58,25 +58,10 @@ head:
   # in the headGroupSpec. See https://github.com/ray-project/kuberay/pull/1128 for more details.
   serviceAccountName: ""
   restartPolicy: ""
-  rayStartParams:
-    object-store-memory: '78643200'
+  rayStartParams: {}
   # containerEnv specifies environment variables for the Ray container,
   # Follows standard K8s container env schema.
-  containerEnv:
-    - name: RAY_DEDUP_LOGS
-      value: "0"
-    - name: RAY_TQDM_PATCH_PRINT
-      value: "0"
-    - name: MYSQL_HOST
-      value: "datamate-database"
-    - name: MYSQL_PORT
-      value: "3306"
-    - name: MYSQL_USER
-      value: "root"
-    - name: MYSQL_PASSWORD
-      value: "password"
-    - name: MYSQL_DATABASE
-      value: "datamate"
+  containerEnv: []
   # - name: EXAMPLE_ENV
   #   value: "1"
   envFrom: []
@@ -93,14 +78,7 @@ head:
   # It is usually best to set requests equal to limits.
   # See https://docs.ray.io/en/latest/cluster/kubernetes/user-guides/config.html#resources
   # for further guidance.
-  resources:
-    limits:
-      cpu: "2"
-      # To avoid out-of-memory issues, never allocate less than 2G memory for the Ray head.
-      memory: "8G"
-    requests:
-      cpu: "1"
-      memory: "2G"
+  resources: {}
   annotations: {}
   nodeSelector: {}
   tolerations: []
@@ -156,21 +134,7 @@ worker:
   initContainers: []
   # containerEnv specifies environment variables for the Ray container,
   # Follows standard K8s container env schema.
-  containerEnv:
-    - name: RAY_DEDUP_LOGS
-      value: "0"
-    - name: RAY_TQDM_PATCH_PRINT
-      value: "0"
-    - name: MYSQL_HOST
-      value: "datamate-database"
-    - name: MYSQL_PORT
-      value: "3306"
-    - name: MYSQL_USER
-      value: "root"
-    - name: MYSQL_PASSWORD
-      value: "password"
-    - name: MYSQL_DATABASE
-      value: "datamate"
+  containerEnv: []
   # - name: EXAMPLE_ENV
   #   value: "1"
   envFrom: []
@@ -187,13 +151,7 @@ worker:
   # It is usually best to set requests equal to limits.
   # See https://docs.ray.io/en/latest/cluster/kubernetes/user-guides/config.html#resources
   # for further guidance.
-  resources:
-    limits:
-      cpu: "4"
-      memory: "8G"
-    requests:
-      cpu: "1"
-      memory: "1G"
+  resources: {}
   annotations: {}
   nodeSelector: {}
   tolerations: []
diff --git a/deployment/helm/datamate/values.yaml b/deployment/helm/datamate/values.yaml
index c0fcfd6..7f913aa 100644
--- a/deployment/helm/datamate/values.yaml
+++ b/deployment/helm/datamate/values.yaml
@@ -77,6 +77,10 @@ database:
       subPath: database
 
 backend:
+  securityContext:
+    capabilities:
+      add:
+        - SYS_ADMIN
   env:
     - name: DB_PASSWORD
       value: *dbPass
@@ -170,6 +174,31 @@ runtime:
 ray-cluster:
   enabled: true
   head:
+    rayStartParams:
+      object-store-memory: '78643200'
+      num-cpus: '0'
+    containerEnv:
+      - name: RAY_DEDUP_LOGS
+        value: "0"
+      - name: RAY_TQDM_PATCH_PRINT
+        value: "0"
+      - name: MYSQL_HOST
+        value: "datamate-database"
+      - name: MYSQL_PORT
+        value: "3306"
+      - name: MYSQL_USER
+        value: "root"
+      - name: MYSQL_PASSWORD
+        value: *dbPass
+      - name: MYSQL_DATABASE
+        value: "datamate"
+    resources:
+      limits:
+        cpu: "2"
+        memory: "8G"
+      requests:
+        cpu: "1"
+        memory: "2G"
     volumes:
       - *datasetVolume
       - *flowVolume
@@ -196,6 +225,28 @@ ray-cluster:
           - containerPort: 8081
         volumeMounts: *runtimeVolumeMounts
   worker:
+    containerEnv:
+      - name: RAY_DEDUP_LOGS
+        value: "0"
+      - name: RAY_TQDM_PATCH_PRINT
+        value: "0"
+      - name: MYSQL_HOST
+        value: "datamate-database"
+      - name: MYSQL_PORT
+        value: "3306"
+      - name: MYSQL_USER
+        value: "root"
+      - name: MYSQL_PASSWORD
+        value: *dbPass
+      - name: MYSQL_DATABASE
+        value: "datamate"
+    resources:
+      limits:
+        cpu: "8"
+        memory: "64G"
+      requests:
+        cpu: "1"
+        memory: "2G"
     volumes:
       - *datasetVolume
       - *flowVolume
diff --git a/runtime/python-executor/datamate/core/base_op.py b/runtime/python-executor/datamate/core/base_op.py
index 6a2c592..5b5e5c6 100644
--- a/runtime/python-executor/datamate/core/base_op.py
+++ b/runtime/python-executor/datamate/core/base_op.py
@@ -146,10 +146,10 @@ class BaseOp:
     def read_file(self, sample):
         filepath = sample[self.filepath_key]
         filetype = sample[self.filetype_key]
-        if filetype in ["ppt", "pptx", "docx", "doc", "xlsx"]:
+        if filetype in ["ppt", "pptx", "docx", "doc", "xlsx", "csv", "md", "pdf"]:
             elements = partition(filename=filepath)
             sample[self.text_key] = "\n\n".join([str(el) for el in elements])
-        elif filetype in ["txt", "md", "markdown", "xml", "html", "csv", "json", "jsonl"]:
+        elif filetype in ["txt", "md", "markdown", "xml", "html", "json", "jsonl"]:
             with open(filepath, 'rb') as f:
                 content = f.read()
                 sample[self.text_key] = content.decode("utf-8-sig").replace("\r\n", "\n")
diff --git a/runtime/python-executor/pyproject.toml b/runtime/python-executor/pyproject.toml
index acffbd9..d84229d 100644
--- a/runtime/python-executor/pyproject.toml
+++ b/runtime/python-executor/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     "loguru>=0.7.3",
     "opencv-python-headless>=4.12.0.88",
     "ray[data,default]==2.52.1",
-    "unstructured[csv,docx,pptx,xlsx]==0.18.15",
+    "unstructured[csv,docx,pptx,xlsx,pdf,md]==0.18.15",
     "uvicorn[standard]>=0.38.0",
 ]
 
diff --git a/scripts/images/runtime/Dockerfile b/scripts/images/runtime/Dockerfile
index 653d016..1794d0c 100644
--- a/scripts/images/runtime/Dockerfile
+++ b/scripts/images/runtime/Dockerfile
@@ -21,7 +21,9 @@ WORKDIR /opt/runtime
 
 RUN --mount=type=cache,target=/root/.cache/uv \
     uv pip install -e . --system \
-    && uv pip install -r /opt/runtime/datamate/ops/pyproject.toml --system \
+    && UV_EXTRA_INDEX_URL="https://download.pytorch.org/whl/cpu" uv pip install -r /opt/runtime/datamate/ops/pyproject.toml --system \
+    && uv pip uninstall torch torchvision triton --system \
+    && uv pip list | grep -E '^nvidia-' | awk '{print $1}' | xargs -r uv pip uninstall --system \
     && python -m spacy download zh_core_web_sm
 
 RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \