dynamic index version control (#27335)

Co-authored-by: longjiquan <jiquan.long@zilliz.com>

configs/milvus.yaml

@@ -523,8 +523,6 @@ common:
       info: 500 # minimum milliseconds for printing durations in info level
       warn: 1000 # minimum milliseconds for printing durations in warn level
 
-  indexEngineVersion: "knowhere-v0"
-
 # QuotaConfig, configurations of Milvus quota and limits.
 # By default, we enable:
 #   1. TT protection;

internal/core/src/common/Types.h

@@ -165,6 +165,7 @@ using BinarySet = knowhere::BinarySet;
 using Dataset = knowhere::DataSet;
 using DatasetPtr = knowhere::DataSetPtr;
 using MetricType = knowhere::MetricType;
+using IndexVersion = knowhere::IndexVersion;
 // TODO :: type define milvus index type(vector index type and scalar index type)
 using IndexType = knowhere::IndexType;
 

internal/core/src/config/ConfigKnowhere.cpp

@@ -21,6 +21,7 @@
 #include "glog/logging.h"
 #include "log/Log.h"
 #include "knowhere/comp/knowhere_config.h"
+#include "knowhere/version.h"
 
 namespace milvus::config {
 
@@ -85,4 +86,14 @@ KnowhereInitSearchThreadPool(const uint32_t num_threads) {
     }
 }
 
+int32_t
+GetMinimalIndexVersion() {
+    return knowhere::Version::GetMinimalVersion().VersionNumber();
+}
+
+int32_t
+GetCurrentIndexVersion() {
+    return knowhere::Version::GetCurrentVersion().VersionNumber();
+}
+
 }  // namespace milvus::config

internal/core/src/config/ConfigKnowhere.h

@@ -30,4 +30,11 @@ KnowhereInitBuildThreadPool(const uint32_t);
 
 void
 KnowhereInitSearchThreadPool(const uint32_t);
+
+int32_t
+GetMinimalIndexVersion();
+
+int32_t
+GetCurrentIndexVersion();
+
 }  // namespace milvus::config

internal/core/src/index/IndexInfo.h

@@ -24,7 +24,7 @@ struct CreateIndexInfo {
     DataType field_type;
     IndexType index_type;
     MetricType metric_type;
-    std::string index_engine_version;
+    IndexVersion index_engine_version;
 };
 
 }  // namespace milvus::index

internal/core/src/index/Utils.cpp

@@ -120,11 +120,13 @@ GetIndexTypeFromConfig(const Config& config) {
     return index_type.value();
 }
 
-std::string
+IndexVersion
 GetIndexEngineVersionFromConfig(const Config& config) {
     auto index_engine_version =
         GetValueFromConfig<std::string>(config, INDEX_ENGINE_VERSION);
-    return index_engine_version.has_value() ? index_engine_version.value() : "";
+    AssertInfo(index_engine_version.has_value(),
+               "index_engine not exist in config");
+    return (std::stoi(index_engine_version.value()));
 }
 
 // TODO :: too ugly

internal/core/src/index/Utils.h

@@ -100,7 +100,7 @@ GetMetricTypeFromConfig(const Config& config);
 std::string
 GetIndexTypeFromConfig(const Config& config);
 
-std::string
+IndexVersion
 GetIndexEngineVersionFromConfig(const Config& config);
 
 storage::FieldDataMeta

internal/core/src/index/VectorDiskIndex.cpp

@@ -36,7 +36,7 @@ template <typename T>
 VectorDiskAnnIndex<T>::VectorDiskAnnIndex(
     const IndexType& index_type,
     const MetricType& metric_type,
-    const std::string& version,
+    const IndexVersion& version,
     const storage::FileManagerContext& file_manager_context)
     : VectorIndex(index_type, metric_type) {
     file_manager_ =

internal/core/src/index/VectorDiskIndex.h

@@ -30,7 +30,7 @@ class VectorDiskAnnIndex : public VectorIndex {
     explicit VectorDiskAnnIndex(
         const IndexType& index_type,
         const MetricType& metric_type,
-        const std::string& version,
+        const IndexVersion& version,
         const storage::FileManagerContext& file_manager_context);
     BinarySet
     Serialize(const Config& config) override {  // deprecated

internal/core/src/index/VectorIndex.h

@@ -91,11 +91,12 @@ class VectorIndex : public IndexBase {
     }
 
     void
-    CheckCompatible(const std::string& version) {
+    CheckCompatible(const IndexVersion& version) {
         std::string err_msg =
-            "version not support : " + version +
+            "version not support : " + std::to_string(version) +
             " , knowhere current version " +
-            knowhere::Version::GetCurrentVersion().VersionCode();
+            std::to_string(
+                knowhere::Version::GetCurrentVersion().VersionNumber());
         AssertInfo(
             knowhere::Version::VersionSupport(knowhere::Version(version)),
             err_msg);

internal/core/src/index/VectorMemIndex.cpp

@@ -51,7 +51,7 @@ namespace milvus::index {
 VectorMemIndex::VectorMemIndex(
     const IndexType& index_type,
     const MetricType& metric_type,
-    const std::string& version,
+    const IndexVersion& version,
     const storage::FileManagerContext& file_manager_context)
     : VectorIndex(index_type, metric_type) {
     AssertInfo(!is_unsupported(index_type, metric_type),

internal/core/src/index/VectorMemIndex.h

@@ -32,7 +32,7 @@ class VectorMemIndex : public VectorIndex {
     explicit VectorMemIndex(
         const IndexType& index_type,
         const MetricType& metric_type,
-        const std::string& version,
+        const IndexVersion& version,
         const storage::FileManagerContext& file_manager_context =
             storage::FileManagerContext());
 

internal/core/src/indexbuilder/index_c.cpp

@@ -53,8 +53,8 @@ CreateIndex(enum CDataType dtype,
             config[param.key()] = param.value();
         }
 
-        config[milvus::index::INDEX_ENGINE_VERSION] =
+        config[milvus::index::INDEX_ENGINE_VERSION] = std::to_string(
-            knowhere::Version::GetDefaultVersion().VersionCode();
+            knowhere::Version::GetCurrentVersion().VersionNumber());
 
         auto& index_factory = milvus::indexbuilder::IndexFactory::GetInstance();
         auto index =
@@ -90,13 +90,11 @@ CreateIndexV2(CIndex* res_index, CBuildIndexInfo c_build_index_info) {
         AssertInfo(index_type.has_value(), "index type is empty");
         index_info.index_type = index_type.value();
 
-        auto engine_version =
+        auto engine_version = build_index_info->index_engine_version;
-            build_index_info->index_engine_version.empty()
-                ? knowhere::Version::GetDefaultVersion().VersionCode()
-                : build_index_info->index_engine_version;
 
         index_info.index_engine_version = engine_version;
-        config[milvus::index::INDEX_ENGINE_VERSION] = engine_version;
+        config[milvus::index::INDEX_ENGINE_VERSION] =
+            std::to_string(engine_version);
 
         // get metric type
         if (milvus::datatype_is_vector(field_type)) {
@@ -459,10 +457,9 @@ AppendInsertFilePath(CBuildIndexInfo c_build_index_info,
 
 CStatus
 AppendIndexEngineVersionToBuildInfo(CBuildIndexInfo c_load_index_info,
-                                    const char* c_index_engine_version) {
+                                    int32_t index_engine_version) {
     try {
         auto build_index_info = (BuildIndexInfo*)c_load_index_info;
-        std::string index_engine_version(c_index_engine_version);
         build_index_info->index_engine_version = index_engine_version;
 
         auto status = CStatus();

internal/core/src/indexbuilder/index_c.h

@@ -88,7 +88,7 @@ AppendInsertFilePath(CBuildIndexInfo c_build_index_info, const char* file_path);
 
 CStatus
 AppendIndexEngineVersionToBuildInfo(CBuildIndexInfo c_load_index_info,
-                                    const char* c_index_engine_version);
+                                    int32_t c_index_engine_version);
 
 CStatus
 CreateIndexV2(CIndex* res_index, CBuildIndexInfo c_build_index_info);

internal/core/src/indexbuilder/types.h

@@ -33,5 +33,5 @@ struct BuildIndexInfo {
     std::vector<std::string> insert_files;
     milvus::storage::StorageConfig storage_config;
     milvus::Config config;
-    std::string index_engine_version;
+    int32_t index_engine_version;
 };

internal/core/src/segcore/FieldIndexing.cpp

@@ -36,7 +36,7 @@ VectorFieldIndexing::VectorFieldIndexing(const FieldMeta& field_meta,
     index_ = std::make_unique<index::VectorMemIndex>(
         config_->GetIndexType(),
         config_->GetMetricType(),
-        knowhere::Version::GetCurrentVersion().VersionCode());
+        knowhere::Version::GetCurrentVersion().VersionNumber());
 }
 
 void
@@ -58,7 +58,7 @@ VectorFieldIndexing::BuildIndexRange(int64_t ack_beg,
         auto indexing = std::make_unique<index::VectorMemIndex>(
             knowhere::IndexEnum::INDEX_FAISS_IVFFLAT,
             knowhere::metric::L2,
-            knowhere::Version::GetCurrentVersion().VersionCode());
+            knowhere::Version::GetCurrentVersion().VersionNumber());
         auto dataset = knowhere::GenDataSet(
             source->get_size_per_chunk(), dim, chunk.data());
         indexing->BuildWithDataset(dataset, conf);

internal/core/src/segcore/Types.h

@@ -42,7 +42,7 @@ struct LoadIndexInfo {
     std::map<std::string, std::string> index_params;
     std::vector<std::string> index_files;
     index::IndexBasePtr index;
-    std::string index_engine_version;
+    IndexVersion index_engine_version;
 };
 
 }  // namespace milvus::segcore

internal/core/src/segcore/load_index_c.cpp

@@ -211,10 +211,7 @@ AppendIndexV2(CLoadIndexInfo c_load_index_info) {
         auto& index_params = load_index_info->index_params;
         auto field_type = load_index_info->field_type;
 
-        auto engine_version =
+        auto engine_version = load_index_info->index_engine_version;
-            load_index_info->index_engine_version.empty()
-                ? knowhere::Version::GetDefaultVersion().VersionCode()
-                : load_index_info->index_engine_version;
 
         milvus::index::CreateIndexInfo index_info;
         index_info.field_type = load_index_info->field_type;
@@ -326,11 +323,10 @@ AppendIndexInfo(CLoadIndexInfo c_load_index_info,
 
 CStatus
 AppendIndexEngineVersionToLoadInfo(CLoadIndexInfo c_load_index_info,
-                                   const char* c_index_engine_version) {
+                                   int32_t index_engine_version) {
     try {
         auto load_index_info =
             (milvus::segcore::LoadIndexInfo*)c_load_index_info;
-        std::string index_engine_version(c_index_engine_version);
         load_index_info->index_engine_version = index_engine_version;
 
         auto status = CStatus();

internal/core/src/segcore/load_index_c.h

@@ -60,7 +60,7 @@ AppendIndexV2(CLoadIndexInfo c_load_index_info);
 
 CStatus
 AppendIndexEngineVersionToLoadInfo(CLoadIndexInfo c_load_index_info,
-                                   const char* c_index_engine_version);
+                                   int32_t index_engine_version);
 
 CStatus
 CleanLoadedIndex(CLoadIndexInfo c_load_index_info);

internal/core/src/segcore/segcore_init_c.cpp

@@ -77,4 +77,14 @@ SegcoreCloseGlog() {
     }
 }
 
+extern "C" int32_t
+GetCurrentIndexVersion() {
+    return milvus::config::GetCurrentIndexVersion();
+}
+
+extern "C" int32_t
+GetMinimalIndexVersion() {
+    return milvus::config::GetMinimalIndexVersion();
+}
+
 }  // namespace milvus::segcore

internal/core/src/segcore/segcore_init_c.h

@@ -43,6 +43,12 @@ SegcoreSetKnowhereSearchThreadPoolNum(const uint32_t num_threads);
 void
 SegcoreCloseGlog();
 
+int32_t
+GetCurrentIndexVersion();
+
+int32_t
+GetMinimalIndexVersion();
+
 #ifdef __cplusplus
 }
 #endif

internal/core/thirdparty/knowhere/CMakeLists.txt

@@ -11,7 +11,7 @@
 # or implied. See the License for the specific language governing permissions and limitations under the License.
 #-------------------------------------------------------------------------------
 
-set( KNOWHERE_VERSION b724230 )
+set( KNOWHERE_VERSION 87190cf )
 set( GIT_REPOSITORY  "https://github.com/zilliztech/knowhere.git")
 if ( INDEX_ENGINE STREQUAL "cardinal" )
     set( KNOWHERE_VERSION main)

internal/core/unittest/bench/bench_indexbuilder.cpp

@@ -61,7 +61,7 @@ IndexBuilder_build(benchmark::State& state) {
         config[param.key()] = param.value();
     }
     config[milvus::index::INDEX_ENGINE_VERSION] =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        std::to_string(knowhere::Version::GetCurrentVersion().VersionNumber());
 
     auto is_binary = state.range(2);
     auto dataset = GenDataset(NB, metric_type, is_binary);

internal/core/unittest/test_array_expr.cpp

@@ -1531,7 +1531,7 @@ TEST(Expr, TestArrayInTerm) {
                  return false;
              }},
     };
-    
+
     std::string raw_plan_tmp = R"(vector_anns: <
                                     field_id: 100
                                     predicates: <

internal/core/unittest/test_c_api.cpp

@@ -249,7 +249,8 @@ generate_index(void* raw_data,
                IndexType index_type,
                int64_t dim,
                int64_t N) {
-    auto engine_version = knowhere::Version::GetCurrentVersion().VersionCode();
+    auto engine_version =
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     CreateIndexInfo create_index_info{
         field_type, index_type, metric_type, engine_version};
     auto indexing = milvus::index::IndexFactory::GetInstance().CreateIndex(
@@ -1600,7 +1601,7 @@ TEST(CApiTest, LoadIndexInfo) {
     auto [raw_data, timestamps, uids] = generate_data(N);
     auto indexing = knowhere::IndexFactory::Instance().Create(
         knowhere::IndexEnum::INDEX_FAISS_IVFSQ8,
-        knowhere::Version::GetCurrentVersion().VersionCode());
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     auto conf =
         knowhere::Json{{knowhere::meta::METRIC_TYPE, knowhere::metric::L2},
                        {knowhere::meta::DIM, DIM},
@@ -1633,7 +1634,9 @@ TEST(CApiTest, LoadIndexInfo) {
     status = AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 0, CDataType::FloatVector, "");
     ASSERT_EQ(status.error_code, Success);
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     status = AppendIndex(c_load_index_info, c_binary_set);
     ASSERT_EQ(status.error_code, Success);
     DeleteLoadIndexInfo(c_load_index_info);
@@ -1648,7 +1651,7 @@ TEST(CApiTest, LoadIndexSearch) {
     auto [raw_data, timestamps, uids] = generate_data(N);
     auto indexing = knowhere::IndexFactory::Instance().Create(
         knowhere::IndexEnum::INDEX_FAISS_IVFSQ8,
-        knowhere::Version::GetCurrentVersion().VersionCode());
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     auto conf =
         knowhere::Json{{knowhere::meta::METRIC_TYPE, knowhere::metric::L2},
                        {knowhere::meta::DIM, DIM},
@@ -1674,7 +1677,7 @@ TEST(CApiTest, LoadIndexSearch) {
     load_index_info.index = std::make_unique<VectorMemIndex>(
         index_params["index_type"],
         knowhere::metric::L2,
-        knowhere::Version::GetCurrentVersion().VersionCode());
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     load_index_info.index->Load(binary_set);
 
     // search
@@ -1792,7 +1795,9 @@ TEST(CApiTest, Indexing_Without_Predicate) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
     // load index for vec field, load raw data for scalar field
     auto sealed_segment = SealedCreator(schema, dataset);
@@ -1932,7 +1937,9 @@ TEST(CApiTest, Indexing_Expr_Without_Predicate) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -2102,7 +2109,9 @@ TEST(CApiTest, Indexing_With_float_Predicate_Range) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -2274,7 +2283,9 @@ TEST(CApiTest, Indexing_Expr_With_float_Predicate_Range) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -2438,7 +2449,9 @@ TEST(CApiTest, Indexing_With_float_Predicate_Term) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -2603,7 +2616,9 @@ TEST(CApiTest, Indexing_Expr_With_float_Predicate_Term) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -2774,7 +2789,9 @@ TEST(CApiTest, Indexing_With_binary_Predicate_Range) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::BinaryVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -2945,7 +2962,9 @@ TEST(CApiTest, Indexing_Expr_With_binary_Predicate_Range) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::BinaryVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -3110,7 +3129,9 @@ TEST(CApiTest, Indexing_With_binary_Predicate_Term) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::BinaryVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -3298,7 +3319,9 @@ TEST(CApiTest, Indexing_Expr_With_binary_Predicate_Term) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::BinaryVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load index for vec field, load raw data for scalar field
@@ -3469,7 +3492,9 @@ TEST(CApiTest, SealedSegment_search_float_Predicate_Range) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     auto query_dataset = knowhere::GenDataSet(num_queries, DIM, query_ptr);
@@ -3694,7 +3719,9 @@ TEST(CApiTest, SealedSegment_search_float_With_Expr_Predicate_Range) {
         c_load_index_info, metric_type_key.c_str(), metric_type_value.c_str());
     AppendFieldInfo(
         c_load_index_info, 0, 0, 0, 100, CDataType::FloatVector, "");
-    AppendIndexEngineVersionToLoadInfo(c_load_index_info, knowhere::Version::GetCurrentVersion().VersionCode().c_str());
+    AppendIndexEngineVersionToLoadInfo(
+        c_load_index_info,
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     AppendIndex(c_load_index_info, (CBinarySet)&binary_set);
 
     // load vec index

internal/core/unittest/test_expr.cpp

@@ -801,7 +801,7 @@ TEST(Expr, TestUnaryRangeJson) {
         proto::plan::Array val;
         std::vector<std::string> nested_path;
     };
-    
+
     proto::plan::Array arr;
     arr.set_same_type(true);
     proto::plan::GenericValue int_val1;

internal/core/unittest/test_index_wrapper.cpp

@@ -134,7 +134,8 @@ TEST_P(IndexWrapperTest, BuildAndQuery) {
 
     storage::FileManagerContext file_manager_context(
         field_data_meta, index_meta, chunk_manager);
-    config[milvus::index::INDEX_ENGINE_VERSION] = knowhere::Version::GetCurrentVersion().VersionCode();
+    config[milvus::index::INDEX_ENGINE_VERSION] =
+        std::to_string(knowhere::Version::GetCurrentVersion().VersionNumber());
     auto index = milvus::indexbuilder::IndexFactory::GetInstance().CreateIndex(
         vec_field_data_type, config, file_manager_context);
 

internal/core/unittest/test_indexing.cpp

@@ -224,7 +224,7 @@ TEST(Indexing, Naive) {
     create_index_info.metric_type = knowhere::metric::L2;
     create_index_info.index_type = knowhere::IndexEnum::INDEX_FAISS_IVFPQ;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     auto index = milvus::index::IndexFactory::GetInstance().CreateIndex(
         create_index_info, milvus::storage::FileManagerContext());
 
@@ -389,7 +389,7 @@ TEST_P(IndexTest, BuildAndQuery) {
     create_index_info.metric_type = metric_type;
     create_index_info.field_type = vec_field_data_type;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     index::IndexBasePtr index;
 
     milvus::storage::FieldDataMeta field_data_meta{1, 2, 3, 100};
@@ -442,7 +442,7 @@ TEST_P(IndexTest, Mmap) {
     create_index_info.metric_type = metric_type;
     create_index_info.field_type = vec_field_data_type;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     index::IndexBasePtr index;
 
     milvus::storage::FieldDataMeta field_data_meta{1, 2, 3, 100};
@@ -499,7 +499,7 @@ TEST_P(IndexTest, GetVector) {
     create_index_info.metric_type = metric_type;
     create_index_info.field_type = vec_field_data_type;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     index::IndexBasePtr index;
 
     milvus::storage::FieldDataMeta field_data_meta{1, 2, 3, 100};
@@ -578,7 +578,7 @@ TEST(Indexing, SearchDiskAnnWithInvalidParam) {
     create_index_info.metric_type = metric_type;
     create_index_info.field_type = milvus::DataType::VECTOR_FLOAT;
     create_index_info.index_engine_version =
-            knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
 
     int64_t collection_id = 1;
     int64_t partition_id = 2;

internal/core/unittest/test_sealed.cpp

@@ -90,7 +90,7 @@ TEST(Sealed, without_predicate) {
     create_index_info.metric_type = knowhere::metric::L2;
     create_index_info.index_type = knowhere::IndexEnum::INDEX_FAISS_IVFFLAT;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
 
     auto indexing = milvus::index::IndexFactory::GetInstance().CreateIndex(
         create_index_info, milvus::storage::FileManagerContext());
@@ -205,7 +205,7 @@ TEST(Sealed, with_predicate) {
     create_index_info.metric_type = knowhere::metric::L2;
     create_index_info.index_type = knowhere::IndexEnum::INDEX_FAISS_IVFFLAT;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     auto indexing = milvus::index::IndexFactory::GetInstance().CreateIndex(
         create_index_info, milvus::storage::FileManagerContext());
 
@@ -311,7 +311,7 @@ TEST(Sealed, with_predicate_filter_all) {
     create_index_info.metric_type = knowhere::metric::L2;
     create_index_info.index_type = knowhere::IndexEnum::INDEX_FAISS_IVFFLAT;
     create_index_info.index_engine_version =
-        knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     auto ivf_indexing = milvus::index::IndexFactory::GetInstance().CreateIndex(
         create_index_info, milvus::storage::FileManagerContext());
 
@@ -351,7 +351,7 @@ TEST(Sealed, with_predicate_filter_all) {
     create_index_info.metric_type = knowhere::metric::L2;
     create_index_info.index_type = knowhere::IndexEnum::INDEX_HNSW;
     create_index_info.index_engine_version =
-            knowhere::Version::GetCurrentVersion().VersionCode();
+        knowhere::Version::GetCurrentVersion().VersionNumber();
     auto hnsw_indexing = milvus::index::IndexFactory::GetInstance().CreateIndex(
         create_index_info, milvus::storage::FileManagerContext());
     hnsw_indexing->BuildWithDataset(database, hnsw_conf);
@@ -1224,7 +1224,7 @@ TEST(Sealed, GetVectorFromChunkCache) {
     auto indexing = std::make_unique<index::VectorMemIndex>(
         index_type,
         metric_type,
-        knowhere::Version::GetCurrentVersion().VersionCode());
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     indexing->BuildWithDataset(ds, conf);
     auto segment_sealed = CreateSealedSegment(schema);
 

internal/core/unittest/test_utils/DataGen.h

@@ -912,7 +912,7 @@ GenVecIndexing(int64_t N, int64_t dim, const float* vec) {
     auto indexing = std::make_unique<index::VectorMemIndex>(
         knowhere::IndexEnum::INDEX_FAISS_IVFFLAT,
         knowhere::metric::L2,
-        knowhere::Version::GetCurrentVersion().VersionCode());
+        knowhere::Version::GetCurrentVersion().VersionNumber());
     indexing->BuildWithDataset(database, conf);
     return indexing;
 }

internal/datacoord/index_builder.go

@@ -292,16 +292,17 @@ func (ib *indexBuilder) process(buildID UniqueID) bool {
 			}
 		}
 		req := &indexpb.CreateJobRequest{
-			ClusterID:          Params.CommonCfg.ClusterPrefix.GetValue(),
+			ClusterID:           Params.CommonCfg.ClusterPrefix.GetValue(),
-			IndexFilePrefix:    path.Join(ib.chunkManager.RootPath(), common.SegmentIndexPath),
+			IndexFilePrefix:     path.Join(ib.chunkManager.RootPath(), common.SegmentIndexPath),
-			BuildID:            buildID,
+			BuildID:             buildID,
-			DataPaths:          binLogs,
+			DataPaths:           binLogs,
-			IndexVersion:       meta.IndexVersion + 1,
+			IndexVersion:        meta.IndexVersion + 1,
-			StorageConfig:      storageConfig,
+			StorageConfig:       storageConfig,
-			IndexParams:        indexParams,
+			IndexParams:         indexParams,
-			TypeParams:         typeParams,
+			TypeParams:          typeParams,
-			NumRows:            meta.NumRows,
+			NumRows:             meta.NumRows,
-			IndexEngineVersion: meta.IndexEngineVersion,
+			CurrentIndexVersion: meta.CurrentIndexVersion,
+			MinimalIndexVersion: meta.MinimalIndexVersion,
 		}
 		if err := ib.assignTask(client, req); err != nil {
 			// need to release lock then reassign, so set task state to retry

internal/datacoord/index_engine_version_manager.go

@@ -0,0 +1,95 @@
+package datacoord
+
+import (
+	"math"
+	"sync"
+
+	"go.uber.org/zap"
+
+	"github.com/milvus-io/milvus/internal/util/sessionutil"
+	"github.com/milvus-io/milvus/pkg/log"
+)
+
+type IndexEngineVersionManager struct {
+	mu       sync.Mutex
+	versions map[int64]sessionutil.IndexEngineVersion
+}
+
+func newIndexEngineVersionManager() *IndexEngineVersionManager {
+	return &IndexEngineVersionManager{
+		versions: map[int64]sessionutil.IndexEngineVersion{},
+	}
+}
+
+func (m *IndexEngineVersionManager) Startup(sessions map[string]*sessionutil.Session) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	for _, session := range sessions {
+		m.addOrUpdate(session)
+	}
+}
+
+func (m *IndexEngineVersionManager) AddNode(session *sessionutil.Session) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	m.addOrUpdate(session)
+}
+
+func (m *IndexEngineVersionManager) RemoveNode(session *sessionutil.Session) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	delete(m.versions, session.ServerID)
+}
+
+func (m *IndexEngineVersionManager) Update(session *sessionutil.Session) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	m.addOrUpdate(session)
+}
+
+func (m *IndexEngineVersionManager) addOrUpdate(session *sessionutil.Session) {
+	log.Info("addOrUpdate version", zap.Int64("nodeId", session.ServerID), zap.Int32("minimal", session.IndexEngineVersion.MinimalIndexVersion), zap.Int32("current", session.IndexEngineVersion.CurrentIndexVersion))
+	m.versions[session.ServerID] = session.IndexEngineVersion
+}
+
+func (m *IndexEngineVersionManager) GetCurrentIndexEngineVersion() int32 {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if len(m.versions) == 0 {
+		log.Info("index versions is empty")
+		return 0
+	}
+
+	current := int32(math.MaxInt32)
+	for _, version := range m.versions {
+		if version.CurrentIndexVersion < current {
+			current = version.CurrentIndexVersion
+		}
+	}
+	log.Info("Merged current version", zap.Int32("current", current))
+	return current
+}
+
+func (m *IndexEngineVersionManager) GetMinimalIndexEngineVersion() int32 {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if len(m.versions) == 0 {
+		log.Info("index versions is empty")
+		return 0
+	}
+
+	minimal := int32(0)
+	for _, version := range m.versions {
+		if version.MinimalIndexVersion > minimal {
+			minimal = version.MinimalIndexVersion
+		}
+	}
+	log.Info("Merged minimal version", zap.Int32("minimal", minimal))
+	return minimal
+}

internal/datacoord/index_engine_version_manager_test.go

@@ -0,0 +1,50 @@
+package datacoord
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/milvus-io/milvus/internal/util/sessionutil"
+)
+
+func Test_IndexEngineVersionManager_GetMergedIndexVersion(t *testing.T) {
+	m := newIndexEngineVersionManager()
+
+	// empty
+	assert.Zero(t, m.GetCurrentIndexEngineVersion())
+
+	// startup
+	m.Startup(map[string]*sessionutil.Session{
+		"1": {
+			ServerID:           1,
+			IndexEngineVersion: sessionutil.IndexEngineVersion{CurrentIndexVersion: 20, MinimalIndexVersion: 0},
+		},
+	})
+	assert.Equal(t, int32(20), m.GetCurrentIndexEngineVersion())
+	assert.Equal(t, int32(0), m.GetMinimalIndexEngineVersion())
+
+	// add node
+	m.AddNode(&sessionutil.Session{
+		ServerID:           2,
+		IndexEngineVersion: sessionutil.IndexEngineVersion{CurrentIndexVersion: 10, MinimalIndexVersion: 5},
+	})
+	assert.Equal(t, int32(10), m.GetCurrentIndexEngineVersion())
+	assert.Equal(t, int32(5), m.GetMinimalIndexEngineVersion())
+
+	// update
+	m.Update(&sessionutil.Session{
+		ServerID:           2,
+		IndexEngineVersion: sessionutil.IndexEngineVersion{CurrentIndexVersion: 5, MinimalIndexVersion: 2},
+	})
+	assert.Equal(t, int32(5), m.GetCurrentIndexEngineVersion())
+	assert.Equal(t, int32(2), m.GetMinimalIndexEngineVersion())
+
+	// remove
+	m.RemoveNode(&sessionutil.Session{
+		ServerID:           2,
+		IndexEngineVersion: sessionutil.IndexEngineVersion{CurrentIndexVersion: 5, MinimalIndexVersion: 3},
+	})
+	assert.Equal(t, int32(20), m.GetCurrentIndexEngineVersion())
+	assert.Equal(t, int32(0), m.GetMinimalIndexEngineVersion())
+}

internal/datacoord/index_service.go

@@ -51,24 +51,25 @@ func (s *Server) startIndexService(ctx context.Context) {
 }
 
 func (s *Server) createIndexForSegment(segment *SegmentInfo, indexID UniqueID) error {
-	indexEngineVersion := Params.CommonCfg.IndexEngineVersion.GetValue()
+	indexEngineVersion := s.IndexEngineVersionManager.GetCurrentIndexEngineVersion()
 	log.Info("create index for segment", zap.Int64("segmentID", segment.ID), zap.Int64("indexID", indexID),
-		zap.String("index_engine_version", indexEngineVersion),
+		zap.Int32("index_engine_version", indexEngineVersion),
 	)
 	buildID, err := s.allocator.allocID(context.Background())
 	if err != nil {
 		return err
 	}
 	segIndex := &model.SegmentIndex{
-		SegmentID:          segment.ID,
+		SegmentID:           segment.ID,
-		CollectionID:       segment.CollectionID,
+		CollectionID:        segment.CollectionID,
-		PartitionID:        segment.PartitionID,
+		PartitionID:         segment.PartitionID,
-		NumRows:            segment.NumOfRows,
+		NumRows:             segment.NumOfRows,
-		IndexID:            indexID,
+		IndexID:             indexID,
-		BuildID:            buildID,
+		BuildID:             buildID,
-		CreateTime:         uint64(segment.ID),
+		CreateTime:          uint64(segment.ID),
-		WriteHandoff:       false,
+		WriteHandoff:        false,
-		IndexEngineVersion: indexEngineVersion,
+		CurrentIndexVersion: s.IndexEngineVersionManager.GetCurrentIndexEngineVersion(),
+		MinimalIndexVersion: s.IndexEngineVersionManager.GetMinimalIndexEngineVersion(),
 	}
 	if err = s.meta.AddSegmentIndex(segIndex); err != nil {
 		return err
@@ -736,17 +737,18 @@ func (s *Server) GetIndexInfos(ctx context.Context, req *indexpb.GetIndexInfoReq
 					indexParams = append(indexParams, s.meta.GetTypeParams(segIdx.CollectionID, segIdx.IndexID)...)
 					ret.SegmentInfo[segID].IndexInfos = append(ret.SegmentInfo[segID].IndexInfos,
 						&indexpb.IndexFilePathInfo{
-							SegmentID:          segID,
+							SegmentID:           segID,
-							FieldID:            s.meta.GetFieldIDByIndexID(segIdx.CollectionID, segIdx.IndexID),
+							FieldID:             s.meta.GetFieldIDByIndexID(segIdx.CollectionID, segIdx.IndexID),
-							IndexID:            segIdx.IndexID,
+							IndexID:             segIdx.IndexID,
-							BuildID:            segIdx.BuildID,
+							BuildID:             segIdx.BuildID,
-							IndexName:          s.meta.GetIndexNameByID(segIdx.CollectionID, segIdx.IndexID),
+							IndexName:           s.meta.GetIndexNameByID(segIdx.CollectionID, segIdx.IndexID),
-							IndexParams:        indexParams,
+							IndexParams:         indexParams,
-							IndexFilePaths:     indexFilePaths,
+							IndexFilePaths:      indexFilePaths,
-							SerializedSize:     segIdx.IndexSize,
+							SerializedSize:      segIdx.IndexSize,
-							IndexVersion:       segIdx.IndexVersion,
+							IndexVersion:        segIdx.IndexVersion,
-							NumRows:            segIdx.NumRows,
+							NumRows:             segIdx.NumRows,
-							IndexEngineVersion: segIdx.IndexEngineVersion,
+							CurrentIndexVersion: segIdx.CurrentIndexVersion,
+							MinimalIndexVersion: segIdx.MinimalIndexVersion,
 						})
 				}
 			}

internal/datacoord/server.go

@@ -135,6 +135,7 @@ type Server struct {
 	dnEventCh <-chan *sessionutil.SessionEvent
 	inEventCh <-chan *sessionutil.SessionEvent
 	// qcEventCh <-chan *sessionutil.SessionEvent
+	qnEventCh <-chan *sessionutil.SessionEvent
 
 	enableActiveStandBy bool
 	activateFunc        func() error
@@ -145,8 +146,9 @@ type Server struct {
 	// indexCoord             types.IndexCoord
 
 	// segReferManager  *SegmentReferenceManager
-	indexBuilder     *indexBuilder
+	indexBuilder              *indexBuilder
-	indexNodeManager *IndexNodeManager
+	indexNodeManager          *IndexNodeManager
+	IndexEngineVersionManager *IndexEngineVersionManager
 
 	// manage ways that data coord access other coord
 	broker Broker
@@ -523,6 +525,15 @@ func (s *Server) initServiceDiscovery() error {
 	}
 	s.inEventCh = s.session.WatchServices(typeutil.IndexNodeRole, inRevision+1, nil)
 
+	s.IndexEngineVersionManager = newIndexEngineVersionManager()
+	qnSessions, qnRevision, err := s.session.GetSessions(typeutil.QueryNodeRole)
+	if err != nil {
+		log.Warn("DataCoord get QueryNode sessions failed", zap.Error(err))
+		return err
+	}
+	s.IndexEngineVersionManager.Startup(qnSessions)
+	s.qnEventCh = s.session.WatchServicesWithVersionRange(typeutil.QueryNodeRole, r, qnRevision+1, nil)
+
 	return nil
 }
 
@@ -818,6 +829,19 @@ func (s *Server) watchService(ctx context.Context) {
 				}()
 				return
 			}
+		case event, ok := <-s.qnEventCh:
+			if !ok {
+				s.stopServiceWatch()
+				return
+			}
+			if err := s.handleSessionEvent(ctx, typeutil.QueryNodeRole, event); err != nil {
+				go func() {
+					if err := s.Stop(); err != nil {
+						log.Warn("DataCoord server stop error", zap.Error(err))
+					}
+				}()
+				return
+			}
 		}
 	}
 }
@@ -881,6 +905,26 @@ func (s *Server) handleSessionEvent(ctx context.Context, role string, event *ses
 			log.Warn("receive unknown service event type",
 				zap.Any("type", event.EventType))
 		}
+	case typeutil.QueryNodeRole:
+		switch event.EventType {
+		case sessionutil.SessionAddEvent:
+			log.Info("received querynode register",
+				zap.String("address", event.Session.Address),
+				zap.Int64("serverID", event.Session.ServerID))
+			s.IndexEngineVersionManager.AddNode(event.Session)
+		case sessionutil.SessionDelEvent:
+			log.Info("received querynode unregister",
+				zap.String("address", event.Session.Address),
+				zap.Int64("serverID", event.Session.ServerID))
+			s.IndexEngineVersionManager.RemoveNode(event.Session)
+		case sessionutil.SessionUpdateEvent:
+			serverID := event.Session.ServerID
+			log.Info("received querynode SessionUpdateEvent", zap.Int64("serverID", serverID))
+			s.IndexEngineVersionManager.Update(event.Session)
+		default:
+			log.Warn("receive unknown service event type",
+				zap.Any("type", event.EventType))
+		}
 	}
 
 	return nil

internal/indexnode/indexnode_service.go

@@ -63,7 +63,8 @@ func (i *IndexNode) CreateJob(ctx context.Context, req *indexpb.CreateJobRequest
 		zap.Any("typeParams", req.GetTypeParams()),
 		zap.Any("indexParams", req.GetIndexParams()),
 		zap.Int64("numRows", req.GetNumRows()),
-		zap.String("index_engine_version", req.GetIndexEngineVersion()),
+		zap.Int32("current_index_version", req.GetCurrentIndexVersion()),
+		zap.Int32("minimal_index_version", req.GetMinimalIndexVersion()),
 	)
 	ctx, sp := otel.Tracer(typeutil.IndexNodeRole).Start(ctx, "IndexNode-CreateIndex", trace.WithAttributes(
 		attribute.Int64("indexBuildID", req.GetBuildID()),

internal/indexnode/task.go

@@ -337,7 +337,7 @@ func (it *indexBuildTask) BuildIndex(ctx context.Context) error {
 		}
 	}
 
-	if err := buildIndexInfo.AppendIndexEngineVersion(it.req.GetIndexEngineVersion()); err != nil {
+	if err := buildIndexInfo.AppendIndexEngineVersion(it.req.GetCurrentIndexVersion()); err != nil {
 		log.Ctx(ctx).Warn("append index engine version failed", zap.Error(err))
 		return err
 	}

internal/metastore/model/segment_index.go

@@ -22,8 +22,9 @@ type SegmentIndex struct {
 	IndexFileKeys []string
 	IndexSize     uint64
 	// deprecated
-	WriteHandoff       bool
+	WriteHandoff        bool
-	IndexEngineVersion string
+	CurrentIndexVersion int32
+	MinimalIndexVersion int32
 }
 
 func UnmarshalSegmentIndexModel(segIndex *indexpb.SegmentIndex) *SegmentIndex {
@@ -32,22 +33,23 @@ func UnmarshalSegmentIndexModel(segIndex *indexpb.SegmentIndex) *SegmentIndex {
 	}
 
 	return &SegmentIndex{
-		SegmentID:          segIndex.SegmentID,
+		SegmentID:           segIndex.SegmentID,
-		CollectionID:       segIndex.CollectionID,
+		CollectionID:        segIndex.CollectionID,
-		PartitionID:        segIndex.PartitionID,
+		PartitionID:         segIndex.PartitionID,
-		NumRows:            segIndex.NumRows,
+		NumRows:             segIndex.NumRows,
-		IndexID:            segIndex.IndexID,
+		IndexID:             segIndex.IndexID,
-		BuildID:            segIndex.BuildID,
+		BuildID:             segIndex.BuildID,
-		NodeID:             segIndex.NodeID,
+		NodeID:              segIndex.NodeID,
-		IndexState:         segIndex.State,
+		IndexState:          segIndex.State,
-		FailReason:         segIndex.FailReason,
+		FailReason:          segIndex.FailReason,
-		IndexVersion:       segIndex.IndexVersion,
+		IndexVersion:        segIndex.IndexVersion,
-		IsDeleted:          segIndex.Deleted,
+		IsDeleted:           segIndex.Deleted,
-		CreateTime:         segIndex.CreateTime,
+		CreateTime:          segIndex.CreateTime,
-		IndexFileKeys:      common.CloneStringList(segIndex.IndexFileKeys),
+		IndexFileKeys:       common.CloneStringList(segIndex.IndexFileKeys),
-		IndexSize:          segIndex.SerializeSize,
+		IndexSize:           segIndex.SerializeSize,
-		WriteHandoff:       segIndex.WriteHandoff,
+		WriteHandoff:        segIndex.WriteHandoff,
-		IndexEngineVersion: segIndex.GetIndexEngineVersion(),
+		CurrentIndexVersion: segIndex.GetCurrentIndexVersion(),
+		MinimalIndexVersion: segIndex.GetMinimalIndexVersion(),
 	}
 }
 
@@ -57,42 +59,44 @@ func MarshalSegmentIndexModel(segIdx *SegmentIndex) *indexpb.SegmentIndex {
 	}
 
 	return &indexpb.SegmentIndex{
-		CollectionID:       segIdx.CollectionID,
+		CollectionID:        segIdx.CollectionID,
-		PartitionID:        segIdx.PartitionID,
+		PartitionID:         segIdx.PartitionID,
-		SegmentID:          segIdx.SegmentID,
+		SegmentID:           segIdx.SegmentID,
-		NumRows:            segIdx.NumRows,
+		NumRows:             segIdx.NumRows,
-		IndexID:            segIdx.IndexID,
+		IndexID:             segIdx.IndexID,
-		BuildID:            segIdx.BuildID,
+		BuildID:             segIdx.BuildID,
-		NodeID:             segIdx.NodeID,
+		NodeID:              segIdx.NodeID,
-		State:              segIdx.IndexState,
+		State:               segIdx.IndexState,
-		FailReason:         segIdx.FailReason,
+		FailReason:          segIdx.FailReason,
-		IndexVersion:       segIdx.IndexVersion,
+		IndexVersion:        segIdx.IndexVersion,
-		IndexFileKeys:      common.CloneStringList(segIdx.IndexFileKeys),
+		IndexFileKeys:       common.CloneStringList(segIdx.IndexFileKeys),
-		Deleted:            segIdx.IsDeleted,
+		Deleted:             segIdx.IsDeleted,
-		CreateTime:         segIdx.CreateTime,
+		CreateTime:          segIdx.CreateTime,
-		SerializeSize:      segIdx.IndexSize,
+		SerializeSize:       segIdx.IndexSize,
-		WriteHandoff:       segIdx.WriteHandoff,
+		WriteHandoff:        segIdx.WriteHandoff,
-		IndexEngineVersion: segIdx.IndexEngineVersion,
+		CurrentIndexVersion: segIdx.CurrentIndexVersion,
+		MinimalIndexVersion: segIdx.MinimalIndexVersion,
 	}
 }
 
 func CloneSegmentIndex(segIndex *SegmentIndex) *SegmentIndex {
 	return &SegmentIndex{
-		SegmentID:          segIndex.SegmentID,
+		SegmentID:           segIndex.SegmentID,
-		CollectionID:       segIndex.CollectionID,
+		CollectionID:        segIndex.CollectionID,
-		PartitionID:        segIndex.PartitionID,
+		PartitionID:         segIndex.PartitionID,
-		NumRows:            segIndex.NumRows,
+		NumRows:             segIndex.NumRows,
-		IndexID:            segIndex.IndexID,
+		IndexID:             segIndex.IndexID,
-		BuildID:            segIndex.BuildID,
+		BuildID:             segIndex.BuildID,
-		NodeID:             segIndex.NodeID,
+		NodeID:              segIndex.NodeID,
-		IndexState:         segIndex.IndexState,
+		IndexState:          segIndex.IndexState,
-		FailReason:         segIndex.FailReason,
+		FailReason:          segIndex.FailReason,
-		IndexVersion:       segIndex.IndexVersion,
+		IndexVersion:        segIndex.IndexVersion,
-		IsDeleted:          segIndex.IsDeleted,
+		IsDeleted:           segIndex.IsDeleted,
-		CreateTime:         segIndex.CreateTime,
+		CreateTime:          segIndex.CreateTime,
-		IndexFileKeys:      common.CloneStringList(segIndex.IndexFileKeys),
+		IndexFileKeys:       common.CloneStringList(segIndex.IndexFileKeys),
-		IndexSize:          segIndex.IndexSize,
+		IndexSize:           segIndex.IndexSize,
-		WriteHandoff:       segIndex.WriteHandoff,
+		WriteHandoff:        segIndex.WriteHandoff,
-		IndexEngineVersion: segIndex.IndexEngineVersion,
+		CurrentIndexVersion: segIndex.CurrentIndexVersion,
+		MinimalIndexVersion: segIndex.MinimalIndexVersion,
 	}
 }

internal/proto/index_coord.proto

@@ -83,7 +83,8 @@ message SegmentIndex {
   uint64 create_time = 13;
   uint64 serialize_size = 14;
   bool write_handoff = 15;
-  string index_engine_version = 16;
+  int32 current_index_version = 16;
+  int32 minimal_index_version = 17;
 }
 
 message RegisterNodeRequest {
@@ -153,7 +154,8 @@ message IndexFilePathInfo {
   uint64 serialized_size = 8;
   int64 index_version = 9;
   int64 num_rows = 10;
-  string index_engine_version = 11;
+  int32 current_index_version = 11;
+  int32 minimal_index_version = 12;
 }
 
 message SegmentInfo {
@@ -225,7 +227,8 @@ message CreateJobRequest {
   repeated common.KeyValuePair index_params = 9;
   repeated common.KeyValuePair type_params = 10;
   int64 num_rows = 11;
-  string index_engine_version = 12;
+  int32 current_index_version = 12;
+  int32 minimal_index_version = 13;
 }
 
 message QueryJobsRequest {

internal/proto/indexpb/index_coord.pb.go

@@ -236,7 +236,8 @@ type SegmentIndex struct {
 	CreateTime           uint64              `protobuf:"varint,13,opt,name=create_time,json=createTime,proto3" json:"create_time,omitempty"`
 	SerializeSize        uint64              `protobuf:"varint,14,opt,name=serialize_size,json=serializeSize,proto3" json:"serialize_size,omitempty"`
 	WriteHandoff         bool                `protobuf:"varint,15,opt,name=write_handoff,json=writeHandoff,proto3" json:"write_handoff,omitempty"`
-	IndexEngineVersion   string              `protobuf:"bytes,16,opt,name=index_engine_version,json=indexEngineVersion,proto3" json:"index_engine_version,omitempty"`
+	CurrentIndexVersion  int32               `protobuf:"varint,16,opt,name=current_index_version,json=currentIndexVersion,proto3" json:"current_index_version,omitempty"`
+	MinimalIndexVersion  int32               `protobuf:"varint,17,opt,name=minimal_index_version,json=minimalIndexVersion,proto3" json:"minimal_index_version,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}            `json:"-"`
 	XXX_unrecognized     []byte              `json:"-"`
 	XXX_sizecache        int32               `json:"-"`
@@ -372,11 +373,18 @@ func (m *SegmentIndex) GetWriteHandoff() bool {
 	return false
 }
 
-func (m *SegmentIndex) GetIndexEngineVersion() string {
+func (m *SegmentIndex) GetCurrentIndexVersion() int32 {
 	if m != nil {
-		return m.IndexEngineVersion
+		return m.CurrentIndexVersion
 	}
-	return ""
+	return 0
+}
+
+func (m *SegmentIndex) GetMinimalIndexVersion() int32 {
+	if m != nil {
+		return m.MinimalIndexVersion
+	}
+	return 0
 }
 
 type RegisterNodeRequest struct {
@@ -901,7 +909,8 @@ type IndexFilePathInfo struct {
 	SerializedSize       uint64                   `protobuf:"varint,8,opt,name=serialized_size,json=serializedSize,proto3" json:"serialized_size,omitempty"`
 	IndexVersion         int64                    `protobuf:"varint,9,opt,name=index_version,json=indexVersion,proto3" json:"index_version,omitempty"`
 	NumRows              int64                    `protobuf:"varint,10,opt,name=num_rows,json=numRows,proto3" json:"num_rows,omitempty"`
-	IndexEngineVersion   string                   `protobuf:"bytes,11,opt,name=index_engine_version,json=indexEngineVersion,proto3" json:"index_engine_version,omitempty"`
+	CurrentIndexVersion  int32                    `protobuf:"varint,11,opt,name=current_index_version,json=currentIndexVersion,proto3" json:"current_index_version,omitempty"`
+	MinimalIndexVersion  int32                    `protobuf:"varint,12,opt,name=minimal_index_version,json=minimalIndexVersion,proto3" json:"minimal_index_version,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                 `json:"-"`
 	XXX_unrecognized     []byte                   `json:"-"`
 	XXX_sizecache        int32                    `json:"-"`
@@ -1002,11 +1011,18 @@ func (m *IndexFilePathInfo) GetNumRows() int64 {
 	return 0
 }
 
-func (m *IndexFilePathInfo) GetIndexEngineVersion() string {
+func (m *IndexFilePathInfo) GetCurrentIndexVersion() int32 {
 	if m != nil {
-		return m.IndexEngineVersion
+		return m.CurrentIndexVersion
 	}
-	return ""
+	return 0
+}
+
+func (m *IndexFilePathInfo) GetMinimalIndexVersion() int32 {
+	if m != nil {
+		return m.MinimalIndexVersion
+	}
+	return 0
 }
 
 type SegmentInfo struct {
@@ -1533,7 +1549,8 @@ type CreateJobRequest struct {
 	IndexParams          []*commonpb.KeyValuePair `protobuf:"bytes,9,rep,name=index_params,json=indexParams,proto3" json:"index_params,omitempty"`
 	TypeParams           []*commonpb.KeyValuePair `protobuf:"bytes,10,rep,name=type_params,json=typeParams,proto3" json:"type_params,omitempty"`
 	NumRows              int64                    `protobuf:"varint,11,opt,name=num_rows,json=numRows,proto3" json:"num_rows,omitempty"`
-	IndexEngineVersion   string                   `protobuf:"bytes,12,opt,name=index_engine_version,json=indexEngineVersion,proto3" json:"index_engine_version,omitempty"`
+	CurrentIndexVersion  int32                    `protobuf:"varint,12,opt,name=current_index_version,json=currentIndexVersion,proto3" json:"current_index_version,omitempty"`
+	MinimalIndexVersion  int32                    `protobuf:"varint,13,opt,name=minimal_index_version,json=minimalIndexVersion,proto3" json:"minimal_index_version,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                 `json:"-"`
 	XXX_unrecognized     []byte                   `json:"-"`
 	XXX_sizecache        int32                    `json:"-"`
@@ -1641,11 +1658,18 @@ func (m *CreateJobRequest) GetNumRows() int64 {
 	return 0
 }
 
-func (m *CreateJobRequest) GetIndexEngineVersion() string {
+func (m *CreateJobRequest) GetCurrentIndexVersion() int32 {
 	if m != nil {
-		return m.IndexEngineVersion
+		return m.CurrentIndexVersion
 	}
-	return ""
+	return 0
+}
+
+func (m *CreateJobRequest) GetMinimalIndexVersion() int32 {
+	if m != nil {
+		return m.MinimalIndexVersion
+	}
+	return 0
 }
 
 type QueryJobsRequest struct {
@@ -2197,154 +2221,156 @@ func init() {
 func init() { proto.RegisterFile("index_coord.proto", fileDescriptor_f9e019eb3fda53c2) }
 
 var fileDescriptor_f9e019eb3fda53c2 = []byte{
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+	0xff, 0x92, 0xba, 0x38, 0x00, 0x06, 0x24, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.

internal/proto/query_coord.proto

@@ -270,7 +270,8 @@ message FieldIndexInfo {
   int64 index_size = 8;
   int64 index_version = 9;
   int64 num_rows = 10;
-  string index_engine_version = 11;
+  int32 current_index_version = 11;
+  int32 minimal_index_version = 12;
 }
 
 enum LoadScope {

internal/proto/querypb/query_coord.pb.go

@@ -251,7 +251,7 @@ func (SyncType) EnumDescriptor() ([]byte, []int) {
 	return fileDescriptor_aab7cc9a69ed26e8, []int{6}
 }
 
-// --------------------QueryCoord grpc request and response proto------------------
+//--------------------QueryCoord grpc request and response proto------------------
 type ShowCollectionsRequest struct {
 	Base *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
 	// Not useful for now
@@ -1336,7 +1336,7 @@ func (m *SyncNewCreatedPartitionRequest) GetPartitionID() int64 {
 	return 0
 }
 
-// -----------------query node grpc request and response proto----------------
+//-----------------query node grpc request and response proto----------------
 type LoadMetaInfo struct {
 	LoadType             LoadType `protobuf:"varint,1,opt,name=load_type,json=loadType,proto3,enum=milvus.proto.query.LoadType" json:"load_type,omitempty"`
 	CollectionID         int64    `protobuf:"varint,2,opt,name=collectionID,proto3" json:"collectionID,omitempty"`
@@ -1771,7 +1771,8 @@ type FieldIndexInfo struct {
 	IndexSize            int64                    `protobuf:"varint,8,opt,name=index_size,json=indexSize,proto3" json:"index_size,omitempty"`
 	IndexVersion         int64                    `protobuf:"varint,9,opt,name=index_version,json=indexVersion,proto3" json:"index_version,omitempty"`
 	NumRows              int64                    `protobuf:"varint,10,opt,name=num_rows,json=numRows,proto3" json:"num_rows,omitempty"`
-	IndexEngineVersion   string                   `protobuf:"bytes,11,opt,name=index_engine_version,json=indexEngineVersion,proto3" json:"index_engine_version,omitempty"`
+	CurrentIndexVersion  int32                    `protobuf:"varint,11,opt,name=current_index_version,json=currentIndexVersion,proto3" json:"current_index_version,omitempty"`
+	MinimalIndexVersion  int32                    `protobuf:"varint,12,opt,name=minimal_index_version,json=minimalIndexVersion,proto3" json:"minimal_index_version,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}                 `json:"-"`
 	XXX_unrecognized     []byte                   `json:"-"`
 	XXX_sizecache        int32                    `json:"-"`
@@ -1872,11 +1873,18 @@ func (m *FieldIndexInfo) GetNumRows() int64 {
 	return 0
 }
 
-func (m *FieldIndexInfo) GetIndexEngineVersion() string {
+func (m *FieldIndexInfo) GetCurrentIndexVersion() int32 {
 	if m != nil {
-		return m.IndexEngineVersion
+		return m.CurrentIndexVersion
 	}
-	return ""
+	return 0
+}
+
+func (m *FieldIndexInfo) GetMinimalIndexVersion() int32 {
+	if m != nil {
+		return m.MinimalIndexVersion
+	}
+	return 0
 }
 
 type LoadSegmentsRequest struct {
@@ -2496,7 +2504,7 @@ func (m *GetLoadInfoResponse) GetPartitions() []int64 {
 	return nil
 }
 
-// ----------------request auto triggered by QueryCoord-----------------
+//----------------request auto triggered by QueryCoord-----------------
 type HandoffSegmentsRequest struct {
 	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
 	SegmentInfos         []*SegmentInfo    `protobuf:"bytes,2,rep,name=segmentInfos,proto3" json:"segmentInfos,omitempty"`
@@ -3193,7 +3201,7 @@ func (m *UnsubscribeChannelInfo) GetCollectionChannels() []*UnsubscribeChannels
 	return nil
 }
 
-// ---- synchronize messages proto between QueryCoord and QueryNode -----
+//---- synchronize messages proto between QueryCoord and QueryNode -----
 type SegmentChangeInfo struct {
 	OnlineNodeID         int64          `protobuf:"varint,1,opt,name=online_nodeID,json=onlineNodeID,proto3" json:"online_nodeID,omitempty"`
 	OnlineSegments       []*SegmentInfo `protobuf:"bytes,2,rep,name=online_segments,json=onlineSegments,proto3" json:"online_segments,omitempty"`
@@ -4582,308 +4590,309 @@ func init() {
 func init() { proto.RegisterFile("query_coord.proto", fileDescriptor_aab7cc9a69ed26e8) }
 
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+	0xc9, 0xf5, 0x2b, 0x88, 0xe2, 0xfb, 0xd0, 0x8a, 0xf2, 0x7f, 0x9a, 0xb1, 0xc8, 0xb9, 0x90, 0xee,
-	0x00, 0xd1, 0xc7, 0xc0, 0xf2, 0xff, 0x19, 0xa8, 0xe3, 0x9b, 0x7c, 0x47, 0x81, 0xe4, 0x7a, 0xe1,
+	0x52, 0x70, 0xe2, 0x8f, 0xa1, 0x9b, 0x29, 0x2c, 0xc8, 0x85, 0x2e, 0xaf, 0x3e, 0xcc, 0x9a, 0xfd,
-	0xfe, 0xb1, 0xe4, 0x7f, 0x0d, 0x56, 0x95, 0xc9, 0x7b, 0xd6, 0x21, 0xf0, 0xeb, 0xca, 0x27, 0x54,
+	0x18, 0x10, 0x7d, 0x42, 0x2c, 0xfe, 0x0b, 0x82, 0x3c, 0xbe, 0xc9, 0x77, 0x8c, 0x90, 0xdc, 0x2c,
-	0x18, 0xb2, 0x0e, 0xe1, 0xc4, 0x11, 0x02, 0xff, 0xc6, 0xbf, 0x23, 0x68, 0xd0, 0x38, 0x8f, 0x4a,
+	0xdc, 0x3f, 0x96, 0xfc, 0x6f, 0xc0, 0x8a, 0x34, 0x79, 0xcf, 0x3a, 0x04, 0x7e, 0x5d, 0xf9, 0x94,
-	0xeb, 0x17, 0x61, 0xde, 0x93, 0x0d, 0xf3, 0x3e, 0x86, 0x6e, 0xe6, 0x91, 0xaa, 0x5a, 0x69, 0xd5,
+	0x0a, 0x43, 0xd6, 0x21, 0x9c, 0x3a, 0x22, 0xc2, 0xbf, 0xfe, 0x1f, 0x08, 0x1a, 0x34, 0xce, 0xa3,
-	0x2f, 0x59, 0x0b, 0x44, 0x2b, 0xf2, 0xfb, 0x4e, 0xf5, 0x56, 0xa8, 0x7c, 0x03, 0x3a, 0x6b, 0xee,
+	0xd2, 0xfa, 0x65, 0x98, 0xf7, 0x64, 0xc3, 0xbc, 0x8f, 0xa1, 0x9b, 0x79, 0xda, 0x2a, 0x57, 0x5a,
-	0x0f, 0xd9, 0x03, 0xf0, 0xf8, 0x34, 0xf7, 0xc5, 0xa9, 0x87, 0x0f, 0xf2, 0xb5, 0xe3, 0x2f, 0x3e,
+	0xf9, 0xfb, 0xd7, 0x02, 0xd1, 0x8a, 0xf8, 0x2a, 0x54, 0xbe, 0x15, 0x4a, 0x5f, 0x8e, 0xce, 0x9a,
-	0x0a, 0xfa, 0x6a, 0x47, 0xa0, 0x1f, 0x43, 0x37, 0xf3, 0xb0, 0x47, 0xad, 0x31, 0xea, 0xd7, 0x3f,
+	0xfb, 0x43, 0xf6, 0x6c, 0x3c, 0x3e, 0xcd, 0x7d, 0x71, 0xea, 0xe1, 0x83, 0x78, 0xed, 0xf8, 0x8b,
-	0xb3, 0x66, 0xff, 0x39, 0x06, 0x4f, 0x16, 0x2c, 0x2b, 0xde, 0x51, 0xa0, 0xf5, 0x69, 0x81, 0xa8,
+	0x8f, 0x82, 0xbe, 0xda, 0x11, 0xe8, 0xc7, 0xd0, 0xcd, 0x3c, 0xec, 0x91, 0x6b, 0x8c, 0xfc, 0xf5,
-	0xfa, 0xc1, 0xc5, 0xec, 0x05, 0xb5, 0x25, 0x33, 0xcd, 0xee, 0x37, 0x09, 0x91, 0xd9, 0x3f, 0x42,
+	0xcf, 0xac, 0xd9, 0x7f, 0x81, 0xc1, 0x93, 0x09, 0x4b, 0x92, 0x77, 0x14, 0x68, 0x6d, 0x5a, 0x20,
-	0xea, 0xbf, 0x5c, 0xec, 0x5f, 0x93, 0xe2, 0x05, 0xed, 0xc2, 0x02, 0x7b, 0xee, 0x83, 0x9e, 0x55,
+	0x2a, 0x7f, 0x70, 0x31, 0x7b, 0x41, 0x6d, 0xc1, 0x4c, 0xb3, 0xfb, 0x4d, 0x42, 0x64, 0xf6, 0xef,
-	0x1f, 0xc2, 0xa4, 0x9e, 0x02, 0xf5, 0x67, 0x3d, 0x18, 0x0a, 0x27, 0x4e, 0x44, 0xe8, 0xff, 0x01,
+	0x93, 0xfa, 0x2f, 0x17, 0xfb, 0xaf, 0xa5, 0x78, 0x41, 0xbb, 0x50, 0x63, 0xcf, 0x7d, 0xd0, 0xb3,
-	0x74, 0x18, 0x28, 0x66, 0xd0, 0x13, 0x9c, 0x7c, 0x17, 0x6a, 0xd4, 0xb5, 0x23, 0xe5, 0x81, 0x42,
+	0xf2, 0x43, 0x98, 0xd4, 0x53, 0xa0, 0xfe, 0xac, 0x07, 0x43, 0xc1, 0xc4, 0x0e, 0x09, 0xfd, 0x3f,
-	0xfa, 0x51, 0x4f, 0x7f, 0xf6, 0x3b, 0x9e, 0x84, 0xe2, 0x26, 0x1d, 0xc9, 0xaa, 0x3a, 0x4f, 0x72,
+	0x80, 0x0e, 0x03, 0xc5, 0x0c, 0x7a, 0x82, 0x93, 0xef, 0x42, 0x95, 0xba, 0x76, 0x24, 0x3d, 0x50,
-	0xea, 0x1b, 0x25, 0xf4, 0x03, 0x68, 0xb3, 0xc9, 0x05, 0x37, 0x9e, 0x24, 0xe5, 0x43, 0x58, 0x4e,
+	0x48, 0x3f, 0xea, 0xe9, 0xcf, 0x7e, 0xc7, 0x93, 0x50, 0xdc, 0xa4, 0x23, 0x59, 0x55, 0xe7, 0x49,
-	0x51, 0xfe, 0x34, 0x50, 0xdc, 0x28, 0xfd, 0x3f, 0x8f, 0xee, 0x3f, 0xa5, 0x8f, 0x6a, 0xb2, 0xd7,
+	0x4e, 0x7d, 0x4b, 0x41, 0x3f, 0x80, 0x36, 0x9b, 0x3c, 0xe2, 0xc6, 0x93, 0xa4, 0x7c, 0x08, 0x4b,
-	0xc6, 0xd0, 0xfa, 0xe9, 0xee, 0xbe, 0xf5, 0xaf, 0x17, 0xee, 0x1f, 0x63, 0xfe, 0x11, 0x68, 0xd9,
+	0x29, 0xca, 0x9f, 0x06, 0x8a, 0x5b, 0xca, 0xff, 0xf3, 0xe8, 0xfe, 0x53, 0xfa, 0xa8, 0x26, 0x7b,
-	0xa3, 0x42, 0xf4, 0xd2, 0x34, 0x5f, 0xa2, 0xc2, 0x39, 0xc3, 0x91, 0x7c, 0x0f, 0x16, 0x58, 0x8d,
+	0x6d, 0x0c, 0xad, 0x9d, 0xed, 0xee, 0x5b, 0xff, 0x66, 0xe1, 0xfe, 0x31, 0xe6, 0x1f, 0x81, 0x9a,
-	0x58, 0x6d, 0x80, 0x52, 0xfd, 0x78, 0xc6, 0x5c, 0x77, 0xbe, 0xf5, 0xd1, 0xc6, 0xc8, 0x8e, 0x0e,
+	0x3d, 0x2a, 0x44, 0x2f, 0x4d, 0xf3, 0x25, 0x32, 0x9c, 0x33, 0x1c, 0xc9, 0xf7, 0xa0, 0xc6, 0x6a,
-	0x26, 0x7b, 0xa4, 0xe5, 0x3a, 0xeb, 0xfa, 0x8a, 0xed, 0xf3, 0x5f, 0xd7, 0x85, 0x2c, 0xaf, 0xd3,
+	0xc4, 0x72, 0x03, 0x14, 0xea, 0xc7, 0x33, 0xe6, 0xba, 0xf7, 0xad, 0x8f, 0xd6, 0x47, 0x56, 0x78,
-	0xd1, 0xd7, 0x29, 0x82, 0xf1, 0xde, 0xde, 0x02, 0xfd, 0xbc, 0xf9, 0x7f, 0x01, 0x00, 0x00, 0xff,
+	0x38, 0xd9, 0x27, 0x2d, 0x37, 0x59, 0xd7, 0x57, 0x2c, 0x8f, 0xff, 0xba, 0x19, 0xc9, 0xf2, 0x26,
-	0xff, 0x58, 0xcf, 0x74, 0x0f, 0x02, 0x54, 0x00, 0x00,
+	0x1d, 0x7d, 0x93, 0x22, 0x18, 0xef, 0xef, 0xd7, 0xe8, 0xe7, 0xed, 0xff, 0x0b, 0x00, 0x00, 0xff,
+	0xff, 0xf9, 0x7b, 0x39, 0xe5, 0x38, 0x54, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.

internal/querycoordv2/meta/coordinator_broker.go

@@ -226,17 +226,18 @@ func (broker *CoordinatorBroker) GetIndexInfo(ctx context.Context, collectionID
 	indexes := make([]*querypb.FieldIndexInfo, 0)
 	for _, info := range segmentInfo.GetIndexInfos() {
 		indexes = append(indexes, &querypb.FieldIndexInfo{
-			FieldID:            info.GetFieldID(),
+			FieldID:             info.GetFieldID(),
-			EnableIndex:        true,
+			EnableIndex:         true,
-			IndexName:          info.GetIndexName(),
+			IndexName:           info.GetIndexName(),
-			IndexID:            info.GetIndexID(),
+			IndexID:             info.GetIndexID(),
-			BuildID:            info.GetBuildID(),
+			BuildID:             info.GetBuildID(),
-			IndexParams:        info.GetIndexParams(),
+			IndexParams:         info.GetIndexParams(),
-			IndexFilePaths:     info.GetIndexFilePaths(),
+			IndexFilePaths:      info.GetIndexFilePaths(),
-			IndexSize:          int64(info.GetSerializedSize()),
+			IndexSize:           int64(info.GetSerializedSize()),
-			IndexVersion:       info.GetIndexVersion(),
+			IndexVersion:        info.GetIndexVersion(),
-			NumRows:            info.GetNumRows(),
+			NumRows:             info.GetNumRows(),
-			IndexEngineVersion: info.GetIndexEngineVersion(),
+			CurrentIndexVersion: info.GetCurrentIndexVersion(),
+			MinimalIndexVersion: info.GetMinimalIndexVersion(),
 		})
 	}
 

internal/querynodev2/segments/load_index_info.go

@@ -87,7 +87,7 @@ func (li *LoadIndexInfo) appendLoadIndexInfo(indexInfo *querypb.FieldIndexInfo,
 		}
 	}
 
-	if err := li.appendIndexEngineVersion(indexInfo.GetIndexEngineVersion()); err != nil {
+	if err := li.appendIndexEngineVersion(indexInfo.GetCurrentIndexVersion()); err != nil {
 		return err
 	}
 
@@ -153,9 +153,8 @@ func (li *LoadIndexInfo) appendIndexData(indexKeys []string) error {
 	return HandleCStatus(&status, "AppendIndex failed")
 }
 
-func (li *LoadIndexInfo) appendIndexEngineVersion(indexEngineVersion string) error {
+func (li *LoadIndexInfo) appendIndexEngineVersion(indexEngineVersion int32) error {
-	cIndexEngineVersion := C.CString(indexEngineVersion)
+	cIndexEngineVersion := C.int32_t(indexEngineVersion)
-	defer C.free(unsafe.Pointer(cIndexEngineVersion))
 
 	status := C.AppendIndexEngineVersionToLoadInfo(li.cLoadIndexInfo, cIndexEngineVersion)
 	return HandleCStatus(&status, "AppendIndexEngineVersion failed")

internal/querynodev2/segments/segment_loader.go

@@ -673,7 +673,8 @@ func (loader *segmentLoader) loadFieldsIndex(ctx context.Context,
 			zap.Int64("segment", segment.segmentID),
 			zap.Int64("fieldID", fieldID),
 			zap.Any("binlog", fieldInfo.FieldBinlog.Binlogs),
-			zap.String("index_engine_version", fieldInfo.IndexInfo.GetIndexEngineVersion()),
+			zap.Int32("current_index_version", fieldInfo.IndexInfo.GetCurrentIndexVersion()),
+			zap.Int32("minimal_index_version", fieldInfo.IndexInfo.GetMinimalIndexVersion()),
 		)
 
 		segment.AddIndex(fieldID, fieldInfo)

internal/querynodev2/server.go

@@ -145,7 +145,12 @@ func NewQueryNode(ctx context.Context, factory dependency.Factory) *QueryNode {
 }
 
 func (node *QueryNode) initSession() error {
-	node.session = sessionutil.NewSession(node.ctx, paramtable.Get().EtcdCfg.MetaRootPath.GetValue(), node.etcdCli)
+	minimalIndexVersion, currentIndexVersion := getIndexEngineVersion()
+	node.session = sessionutil.NewSession(node.ctx,
+		paramtable.Get().EtcdCfg.MetaRootPath.GetValue(),
+		node.etcdCli,
+		sessionutil.WithIndexEngineVersion(minimalIndexVersion, currentIndexVersion),
+	)
 	if node.session == nil {
 		return fmt.Errorf("session is nil, the etcd client connection may have failed")
 	}
@@ -241,6 +246,11 @@ func (node *QueryNode) InitSegcore() error {
 	return nil
 }
 
+func getIndexEngineVersion() (minimal, current int32) {
+	cMinimal, cCurrent := C.GetMinimalIndexVersion(), C.GetCurrentIndexVersion()
+	return int32(cMinimal), int32(cCurrent)
+}
+
 func (node *QueryNode) CloseSegcore() {
 	// safe stop
 	initcore.CleanRemoteChunkManager()

internal/util/indexcgowrapper/build_index_info.go

@@ -151,9 +151,8 @@ func (bi *BuildIndexInfo) AppendInsertFile(filePath string) error {
 	return HandleCStatus(&status, "appendInsertFile failed")
 }
 
-func (bi *BuildIndexInfo) AppendIndexEngineVersion(indexEngineVersion string) error {
+func (bi *BuildIndexInfo) AppendIndexEngineVersion(indexEngineVersion int32) error {
-	cIndexEngineVersion := C.CString(indexEngineVersion)
+	cIndexEngineVersion := C.int32_t(indexEngineVersion)
-	defer C.free(unsafe.Pointer(cIndexEngineVersion))
 
 	status := C.AppendIndexEngineVersionToBuildInfo(bi.cBuildIndexInfo, cIndexEngineVersion)
 	return HandleCStatus(&status, "AppendIndexEngineVersion failed")

internal/util/sessionutil/session_util.go

@@ -78,6 +78,11 @@ const (
 	SessionUpdateEvent
 )
 
+type IndexEngineVersion struct {
+	MinimalIndexVersion int32 `json:"MinimalIndexVersion,omitempty"`
+	CurrentIndexVersion int32 `json:"CurrentIndexVersion,omitempty"`
+}
+
 // Session is a struct to store service's session, including ServerID, ServerName,
 // Address.
 // Exclusive indicates that this server can only start one.
@@ -89,13 +94,14 @@ type Session struct {
 	keepAliveCancel context.CancelFunc
 	keepAliveCtx    context.Context
 
-	ServerID    int64  `json:"ServerID,omitempty"`
+	ServerID           int64  `json:"ServerID,omitempty"`
-	ServerName  string `json:"ServerName,omitempty"`
+	ServerName         string `json:"ServerName,omitempty"`
-	Address     string `json:"Address,omitempty"`
+	Address            string `json:"Address,omitempty"`
-	Exclusive   bool   `json:"Exclusive,omitempty"`
+	Exclusive          bool   `json:"Exclusive,omitempty"`
-	Stopping    bool   `json:"Stopping,omitempty"`
+	Stopping           bool   `json:"Stopping,omitempty"`
-	TriggerKill bool
+	TriggerKill        bool
-	Version     semver.Version `json:"Version,omitempty"`
+	Version            semver.Version     `json:"Version,omitempty"`
+	IndexEngineVersion IndexEngineVersion `json:"IndexEngineVersion,omitempty"`
 
 	liveChOnce sync.Once
 	liveCh     chan struct{}
@@ -134,6 +140,14 @@ func WithResueNodeID(b bool) SessionOption {
 	return func(session *Session) { session.reuseNodeID = b }
 }
 
+// WithIndexEngineVersion should be only used by querynode.
+func WithIndexEngineVersion(minimal, current int32) SessionOption {
+	return func(session *Session) {
+		session.IndexEngineVersion.MinimalIndexVersion = minimal
+		session.IndexEngineVersion.CurrentIndexVersion = current
+	}
+}
+
 func (s *Session) apply(opts ...SessionOption) {
 	for _, opt := range opts {
 		opt(s)
@@ -143,14 +157,15 @@ func (s *Session) apply(opts ...SessionOption) {
 // UnmarshalJSON unmarshal bytes to Session.
 func (s *Session) UnmarshalJSON(data []byte) error {
 	var raw struct {
-		ServerID    int64  `json:"ServerID,omitempty"`
+		ServerID           int64  `json:"ServerID,omitempty"`
-		ServerName  string `json:"ServerName,omitempty"`
+		ServerName         string `json:"ServerName,omitempty"`
-		Address     string `json:"Address,omitempty"`
+		Address            string `json:"Address,omitempty"`
-		Exclusive   bool   `json:"Exclusive,omitempty"`
+		Exclusive          bool   `json:"Exclusive,omitempty"`
-		Stopping    bool   `json:"Stopping,omitempty"`
+		Stopping           bool   `json:"Stopping,omitempty"`
-		TriggerKill bool
+		TriggerKill        bool
-		Version     string            `json:"Version"`
+		Version            string            `json:"Version"`
-		LeaseID     *clientv3.LeaseID `json:"LeaseID,omitempty"`
+		IndexEngineVersion string            `json:"IndexEngineVersion,omitempty"`
+		LeaseID            *clientv3.LeaseID `json:"LeaseID,omitempty"`
 	}
 	err := json.Unmarshal(data, &raw)
 	if err != nil {
@@ -164,6 +179,17 @@ func (s *Session) UnmarshalJSON(data []byte) error {
 		}
 	}
 
+	if raw.IndexEngineVersion != "" {
+		json.Unmarshal([]byte(raw.IndexEngineVersion), &s.IndexEngineVersion)
+		if err != nil {
+			return err
+		}
+	} else {
+		// set zero when queryNode not register knowhere version
+		s.IndexEngineVersion.MinimalIndexVersion = 0
+		s.IndexEngineVersion.CurrentIndexVersion = 0
+	}
+
 	s.ServerID = raw.ServerID
 	s.ServerName = raw.ServerName
 	s.Address = raw.Address
@@ -177,24 +203,30 @@ func (s *Session) UnmarshalJSON(data []byte) error {
 // MarshalJSON marshals session to bytes.
 func (s *Session) MarshalJSON() ([]byte, error) {
 	verStr := s.Version.String()
+	indexVerStr, err := json.Marshal(s.IndexEngineVersion)
+	if err != nil {
+		return nil, err
+	}
 	return json.Marshal(&struct {
-		ServerID    int64  `json:"ServerID,omitempty"`
+		ServerID           int64  `json:"ServerID,omitempty"`
-		ServerName  string `json:"ServerName,omitempty"`
+		ServerName         string `json:"ServerName,omitempty"`
-		Address     string `json:"Address,omitempty"`
+		Address            string `json:"Address,omitempty"`
-		Exclusive   bool   `json:"Exclusive,omitempty"`
+		Exclusive          bool   `json:"Exclusive,omitempty"`
-		Stopping    bool   `json:"Stopping,omitempty"`
+		Stopping           bool   `json:"Stopping,omitempty"`
-		TriggerKill bool
+		TriggerKill        bool
-		Version     string            `json:"Version"`
+		Version            string            `json:"Version"`
-		LeaseID     *clientv3.LeaseID `json:"LeaseID,omitempty"`
+		IndexEngineVersion string            `json:"IndexEngineVersion,omitempty"`
+		LeaseID            *clientv3.LeaseID `json:"LeaseID,omitempty"`
 	}{
-		ServerID:    s.ServerID,
+		ServerID:           s.ServerID,
-		ServerName:  s.ServerName,
+		ServerName:         s.ServerName,
-		Address:     s.Address,
+		Address:            s.Address,
-		Exclusive:   s.Exclusive,
+		Exclusive:          s.Exclusive,
-		Stopping:    s.Stopping,
+		Stopping:           s.Stopping,
-		TriggerKill: s.TriggerKill,
+		TriggerKill:        s.TriggerKill,
-		Version:     verStr,
+		Version:            verStr,
-		LeaseID:     s.leaseID,
+		IndexEngineVersion: string(indexVerStr),
+		LeaseID:            s.leaseID,
 	})
 }
 

pkg/util/paramtable/component_param.go

@@ -216,8 +216,6 @@ type commonConfig struct {
 	EnableLockMetrics        ParamItem `refreshable:"false"`
 	LockSlowLogInfoThreshold ParamItem `refreshable:"true"`
 	LockSlowLogWarnThreshold ParamItem `refreshable:"true"`
-
-	IndexEngineVersion ParamItem `refreshable:"true"`
 }
 
 func (p *commonConfig) init(base *BaseTable) {
@@ -614,15 +612,6 @@ like the old password verification when updating the credential`,
 		Export:       true,
 	}
 	p.LockSlowLogWarnThreshold.Init(base.mgr)
-
-	p.IndexEngineVersion = ParamItem{
-		Key:          "common.indexEngineVersion",
-		Version:      "2.3.2",
-		DefaultValue: "knowhere-v0",
-		Doc:          "version of index engine",
-		Export:       true,
-	}
-	p.IndexEngineVersion.Init(base.mgr)
 }
 
 type traceConfig struct {

tests/scripts/values/cardinal.yaml

@@ -1,4 +0,0 @@
-extraConfigFiles:
-  user.yaml: |+
-    common:
-      indexEngineVersion: "cardinal-v0"