diff --git a/core/src/index/knowhere/knowhere/index/vector_index/IndexKDT.cpp b/core/src/index/knowhere/knowhere/index/vector_index/IndexKDT.cpp
index 9142bbab8eb34d59c671bcaf1a5c6412543cb404..1bd45075e3f0f87bc3423391a5813eb61ac572b0 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/IndexKDT.cpp
+++ b/core/src/index/knowhere/knowhere/index/vector_index/IndexKDT.cpp
@@ -38,23 +38,23 @@ CPUKDTRNG::Serialize() {
     std::vector<int64_t> index_len;
 
     // TODO(zirui): dev
-//    index_ptr_->SaveIndexToMemory(index_blobs, index_len);
+    //    index_ptr_->SaveIndexToMemory(index_blobs, index_len);
     BinarySet binary_set;
 
-//
-//    auto sample = std::make_shared<uint8_t>();
-//    sample.reset(static_cast<uint8_t*>(index_blobs[0]));
-//    auto tree = std::make_shared<uint8_t>();
-//    tree.reset(static_cast<uint8_t*>(index_blobs[1]));
-//    auto graph = std::make_shared<uint8_t>();
-//    graph.reset(static_cast<uint8_t*>(index_blobs[2]));
-//    auto metadata = std::make_shared<uint8_t>();
-//    metadata.reset(static_cast<uint8_t*>(index_blobs[3]));
-//
-//    binary_set.Append("samples", sample, index_len[0]);
-//    binary_set.Append("tree", tree, index_len[1]);
-//    binary_set.Append("graph", graph, index_len[2]);
-//    binary_set.Append("metadata", metadata, index_len[3]);
+    //
+    //    auto sample = std::make_shared<uint8_t>();
+    //    sample.reset(static_cast<uint8_t*>(index_blobs[0]));
+    //    auto tree = std::make_shared<uint8_t>();
+    //    tree.reset(static_cast<uint8_t*>(index_blobs[1]));
+    //    auto graph = std::make_shared<uint8_t>();
+    //    graph.reset(static_cast<uint8_t*>(index_blobs[2]));
+    //    auto metadata = std::make_shared<uint8_t>();
+    //    metadata.reset(static_cast<uint8_t*>(index_blobs[3]));
+    //
+    //    binary_set.Append("samples", sample, index_len[0]);
+    //    binary_set.Append("tree", tree, index_len[1]);
+    //    binary_set.Append("graph", graph, index_len[2]);
+    //    binary_set.Append("metadata", metadata, index_len[3]);
     return binary_set;
 }
 
@@ -62,21 +62,21 @@ void
 CPUKDTRNG::Load(const BinarySet& binary_set) {
     // TODO(zirui): dev
 
-//    std::vector<void*> index_blobs;
-//
-//    auto samples = binary_set.GetByName("samples");
-//    index_blobs.push_back(samples->data.get());
-//
-//    auto tree = binary_set.GetByName("tree");
-//    index_blobs.push_back(tree->data.get());
-//
-//    auto graph = binary_set.GetByName("graph");
-//    index_blobs.push_back(graph->data.get());
-//
-//    auto metadata = binary_set.GetByName("metadata");
-//    index_blobs.push_back(metadata->data.get());
-//
-//    index_ptr_->LoadIndexFromMemory(index_blobs);
+    //    std::vector<void*> index_blobs;
+    //
+    //    auto samples = binary_set.GetByName("samples");
+    //    index_blobs.push_back(samples->data.get());
+    //
+    //    auto tree = binary_set.GetByName("tree");
+    //    index_blobs.push_back(tree->data.get());
+    //
+    //    auto graph = binary_set.GetByName("graph");
+    //    index_blobs.push_back(graph->data.get());
+    //
+    //    auto metadata = binary_set.GetByName("metadata");
+    //    index_blobs.push_back(metadata->data.get());
+    //
+    //    index_ptr_->LoadIndexFromMemory(index_blobs);
 }
 
 // PreprocessorPtr
diff --git a/core/src/index/unittest/test_kdt.cpp b/core/src/index/unittest/test_kdt.cpp
index f0428f52e027da06e4c81fd6634344afbbc5a276..f9058cc4d272fccab8e97a73fc0bc4ef5221ad0d 100644
--- a/core/src/index/unittest/test_kdt.cpp
+++ b/core/src/index/unittest/test_kdt.cpp
@@ -112,7 +112,7 @@ TEST_F(KDTTest, kdt_basic) {
 }
 
 // TODO(zirui): enable test
-//TEST_F(KDTTest, kdt_serialize) {
+// TEST_F(KDTTest, kdt_serialize) {
 //    assert(!xb.empty());
 //
 //    auto preprocessor = index_->BuildPreprocessor(base_dataset, conf);