diff --git a/internal/core/src/utils/tools.h b/internal/core/src/index/knowhere/utils/Utils.h
similarity index 99%
rename from internal/core/src/utils/tools.h
rename to internal/core/src/index/knowhere/utils/Utils.h
index b99ddda6ef..63f50c6b1c 100644
--- a/internal/core/src/utils/tools.h
+++ b/internal/core/src/index/knowhere/utils/Utils.h
@@ -10,9 +10,12 @@
 // or implied. See the License for the specific language governing permissions and limitations under the License
 
 #pragma once
+
 #include <cstdint>
 #include "exceptions/EasyAssert.h"
+
 namespace milvus {
+
 inline int64_t
 upper_align(int64_t value, int64_t align) {
     Assert(align > 0);
diff --git a/internal/core/src/query/SearchOnGrowing.cpp b/internal/core/src/query/SearchOnGrowing.cpp
index f41dfebfc5..f2c80a8c21 100644
--- a/internal/core/src/query/SearchOnGrowing.cpp
+++ b/internal/core/src/query/SearchOnGrowing.cpp
@@ -15,7 +15,7 @@
 #include "segcore/Reduce.h"
 
 #include <faiss/utils/distances.h>
-#include "utils/tools.h"
+#include "utils/Utils.h"
 #include "query/SearchBruteForce.h"
 #include "query/SearchOnIndex.h"
 
diff --git a/internal/core/src/segcore/ConcurrentVector.h b/internal/core/src/segcore/ConcurrentVector.h
index 4d7686d0c9..763dfdac15 100644
--- a/internal/core/src/segcore/ConcurrentVector.h
+++ b/internal/core/src/segcore/ConcurrentVector.h
@@ -20,7 +20,7 @@
 #include <vector>
 #include <utility>
 #include "exceptions/EasyAssert.h"
-#include "utils/tools.h"
+#include "utils/Utils.h"
 #include <boost/container/vector.hpp>
 #include "common/Types.h"
 #include "common/Span.h"
diff --git a/internal/core/src/segcore/SegmentGrowingImpl.cpp b/internal/core/src/segcore/SegmentGrowingImpl.cpp
index 1e8e35495c..78ea9e0bb0 100644
--- a/internal/core/src/segcore/SegmentGrowingImpl.cpp
+++ b/internal/core/src/segcore/SegmentGrowingImpl.cpp
@@ -27,7 +27,7 @@
 #include "query/generated/ExecPlanNodeVisitor.h"
 #include "segcore/Reduce.h"
 #include "segcore/SegmentGrowingImpl.h"
-#include "utils/tools.h"
+#include "utils/Utils.h"
 
 namespace milvus::segcore {
 
diff --git a/internal/core/src/utils/Utils.h b/internal/core/src/utils/Utils.h
new file mode 100644
index 0000000000..63f50c6b1c
--- /dev/null
+++ b/internal/core/src/utils/Utils.h
@@ -0,0 +1,33 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License
+
+#pragma once
+
+#include <cstdint>
+#include "exceptions/EasyAssert.h"
+
+namespace milvus {
+
+inline int64_t
+upper_align(int64_t value, int64_t align) {
+    Assert(align > 0);
+    auto groups = (value + align - 1) / align;
+    return groups * align;
+}
+
+inline int64_t
+upper_div(int64_t value, int64_t align) {
+    Assert(align > 0);
+    auto groups = (value + align - 1) / align;
+    return groups;
+}
+
+}  // namespace milvus
diff --git a/internal/core/unittest/test_expr.cpp b/internal/core/unittest/test_expr.cpp
index 4532468f6e..35b27fa393 100644
--- a/internal/core/unittest/test_expr.cpp
+++ b/internal/core/unittest/test_expr.cpp
@@ -22,7 +22,7 @@
 #include "query/generated/ExecExprVisitor.h"
 #include "segcore/SegmentGrowingImpl.h"
 #include "test_utils/DataGen.h"
-#include "utils/tools.h"
+#include "utils/Utils.h"
 
 using namespace milvus;
 
diff --git a/internal/core/unittest/test_span.cpp b/internal/core/unittest/test_span.cpp
index 82806a93f2..4cd5f90477 100644
--- a/internal/core/unittest/test_span.cpp
+++ b/internal/core/unittest/test_span.cpp
@@ -13,7 +13,7 @@
 
 #include "segcore/SegmentGrowing.h"
 #include "test_utils/DataGen.h"
-#include "utils/tools.h"
+#include "utils/Utils.h"
 
 const int64_t ROW_COUNT = 100 * 1000;