Refactor log on search and insert request (#1887)

* fix stash conflict

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* Log config information and device information (fix #1893)

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* Add index annoy into http module (fix #1882)

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* Refactor log on search and insert request (fix #1886)

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* use vsnprintf to avoid oom

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* fix PR Quality problem & remove surplus comments

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* code format

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* replace strlen with strnlen & remove some surplus comments

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* format

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

CHANGELOG.md

@@ -17,11 +17,14 @@ Please mark all change in change log and use the issue from GitHub
 -   \#1661 HNSW support deleted vectors searching
 -   \#1825 Add annoy index type in C++ sdk
 -   \#1849 NSG support deleted vectors searching
+-   \#1893 Log config information and device information
 
 ## Improvement
 -   \#1627 Move read/write index APIs into codec
 -   \#1784 Add Substructure and Superstructure in http module
 -   \#1858 Disable S3 build
+-   \#1882 Add index annoy into http module
+-   \#1886 Refactor log on search and insert request
 
 ## Task
 

core/src/config/Config.cpp

@@ -314,9 +314,9 @@ Config::ResetDefaultConfig() {
 }
 
 void
-Config::GetConfigJsonStr(std::string& result) {
+Config::GetConfigJsonStr(std::string& result, int64_t indent) {
     nlohmann::json config_json(config_map_);
-    result = config_json.dump();
+    result = config_json.dump(indent);
 }
 
 Status

core/src/config/Config.h

@@ -161,7 +161,7 @@ class Config {
     Status
     ResetDefaultConfig();
     void
-    GetConfigJsonStr(std::string& result);
+    GetConfigJsonStr(std::string& result, int64_t indent = -1);
     Status
     ProcessConfigCli(std::string& result, const std::string& cmd);
 

core/src/db/DBImpl.cpp

@@ -508,6 +508,7 @@ DBImpl::InsertVectors(const std::string& collection_id, const std::string& parti
         SafeIDGenerator& id_generator = SafeIDGenerator::GetInstance();
         Status status = id_generator.GetNextIDNumbers(vectors.vector_count_, vectors.id_array_);
         if (!status.ok()) {
+            ENGINE_LOG_ERROR << LogOut("[%s][%ld] Get next id number fail: %s", "insert", 0, status.message().c_str());
             return status;
         }
     }
@@ -517,6 +518,7 @@ DBImpl::InsertVectors(const std::string& collection_id, const std::string& parti
         std::string target_collection_name;
         status = GetPartitionByTag(collection_id, partition_tag, target_collection_name);
         if (!status.ok()) {
+            ENGINE_LOG_ERROR << LogOut("[%s][%ld] Get partition fail: %s", "insert", 0, status.message().c_str());
             return status;
         }
 
@@ -1215,7 +1217,7 @@ DBImpl::QueryAsync(const std::shared_ptr<server::Context>& context, const meta::
     // step 1: construct search job
     auto status = OngoingFileChecker::GetInstance().MarkOngoingFiles(files);
 
-    ENGINE_LOG_DEBUG << "Engine query begin, index file count: " << files.size();
+    ENGINE_LOG_DEBUG << LogOut("Engine query begin, index file count: %ld", files.size());
     scheduler::SearchJobPtr job = std::make_shared<scheduler::SearchJob>(tracer.Context(), k, extra_params, vectors);
     for (auto& file : files) {
         scheduler::SegmentSchemaPtr file_ptr = std::make_shared<meta::SegmentSchema>(file);
@@ -1856,6 +1858,7 @@ DBImpl::ExecWalRecord(const wal::MXLogRecord& record) {
             std::string target_collection_name;
             status = GetPartitionByTag(record.collection_id, record.partition_tag, target_collection_name);
             if (!status.ok()) {
+                WAL_LOG_ERROR << LogOut("[%s][%ld] ", "insert", 0) << "Get partition fail: " << status.message();
                 return status;
             }
 
@@ -1875,6 +1878,7 @@ DBImpl::ExecWalRecord(const wal::MXLogRecord& record) {
             std::string target_collection_name;
             status = GetPartitionByTag(record.collection_id, record.partition_tag, target_collection_name);
             if (!status.ok()) {
+                WAL_LOG_ERROR << LogOut("[%s][%ld] ", "insert", 0) << "Get partition fail: " << status.message();
                 return status;
             }
 

core/src/db/engine/ExecutionEngineImpl.cpp

@@ -763,10 +763,10 @@ ExecutionEngineImpl::Search(int64_t n, const float* data, int64_t k, const milvu
         }
     }
 #endif
-    TimeRecorder rc("ExecutionEngineImpl::Search float");
+    TimeRecorder rc(LogOut("[%s][%ld] ExecutionEngineImpl::Search float", "search", 0));
 
     if (index_ == nullptr) {
-        ENGINE_LOG_ERROR << "ExecutionEngineImpl: index is null, failed to search";
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] ExecutionEngineImpl: index is null, failed to search", "search", 0);
         return Status(DB_ERROR, "index is null");
     }
 
@@ -774,6 +774,7 @@ ExecutionEngineImpl::Search(int64_t n, const float* data, int64_t k, const milvu
     conf[knowhere::meta::TOPK] = k;
     auto adapter = knowhere::AdapterMgr::GetInstance().GetAdapter(index_->index_type());
     if (!adapter->CheckSearch(conf, index_->index_type(), index_->index_mode())) {
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] Illegal search params", "search", 0);
         throw Exception(DB_ERROR, "Illegal search params");
     }
 
@@ -786,7 +787,8 @@ ExecutionEngineImpl::Search(int64_t n, const float* data, int64_t k, const milvu
     auto result = index_->Query(dataset, conf);
     rc.RecordSection("query done");
 
-    ENGINE_LOG_DEBUG << "get uids " << index_->GetUids().size() << " from index " << location_;
+    ENGINE_LOG_DEBUG << LogOut("[%s][%ld] get %ld uids from index %s", "search", 0, index_->GetUids().size(),
+                               location_.c_str());
     MapAndCopyResult(result, index_->GetUids(), n, k, distances, labels);
     rc.RecordSection("map uids " + std::to_string(n * k));
 
@@ -800,10 +802,10 @@ ExecutionEngineImpl::Search(int64_t n, const float* data, int64_t k, const milvu
 Status
 ExecutionEngineImpl::Search(int64_t n, const uint8_t* data, int64_t k, const milvus::json& extra_params,
                             float* distances, int64_t* labels, bool hybrid) {
-    TimeRecorder rc("ExecutionEngineImpl::Search uint8");
+    TimeRecorder rc(LogOut("[%s][%ld] ExecutionEngineImpl::Search uint8", "search", 0));
 
     if (index_ == nullptr) {
-        ENGINE_LOG_ERROR << "ExecutionEngineImpl: index is null, failed to search";
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] ExecutionEngineImpl: index is null, failed to search", "search", 0);
         return Status(DB_ERROR, "index is null");
     }
 
@@ -811,6 +813,7 @@ ExecutionEngineImpl::Search(int64_t n, const uint8_t* data, int64_t k, const mil
     conf[knowhere::meta::TOPK] = k;
     auto adapter = knowhere::AdapterMgr::GetInstance().GetAdapter(index_->index_type());
     if (!adapter->CheckSearch(conf, index_->index_type(), index_->index_mode())) {
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] Illegal search params", "search", 0);
         throw Exception(DB_ERROR, "Illegal search params");
     }
 
@@ -823,7 +826,8 @@ ExecutionEngineImpl::Search(int64_t n, const uint8_t* data, int64_t k, const mil
     auto result = index_->Query(dataset, conf);
     rc.RecordSection("query done");
 
-    ENGINE_LOG_DEBUG << "get uids " << index_->GetUids().size() << " from index " << location_;
+    ENGINE_LOG_DEBUG << LogOut("[%s][%ld] get %ld uids from index %s", "search", 0, index_->GetUids().size(),
+                               location_.c_str());
     MapAndCopyResult(result, index_->GetUids(), n, k, distances, labels);
     rc.RecordSection("map uids " + std::to_string(n * k));
 
@@ -837,10 +841,10 @@ ExecutionEngineImpl::Search(int64_t n, const uint8_t* data, int64_t k, const mil
 Status
 ExecutionEngineImpl::Search(int64_t n, const std::vector<int64_t>& ids, int64_t k, const milvus::json& extra_params,
                             float* distances, int64_t* labels, bool hybrid) {
-    TimeRecorder rc("ExecutionEngineImpl::Search vector of ids");
+    TimeRecorder rc(LogOut("[%s][%ld] ExecutionEngineImpl::Search vector of ids", "search", 0));
 
     if (index_ == nullptr) {
-        ENGINE_LOG_ERROR << "ExecutionEngineImpl: index is null, failed to search";
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] ExecutionEngineImpl: index is null, failed to search", "search", 0);
         return Status(DB_ERROR, "index is null");
     }
 
@@ -848,6 +852,7 @@ ExecutionEngineImpl::Search(int64_t n, const std::vector<int64_t>& ids, int64_t
     conf[knowhere::meta::TOPK] = k;
     auto adapter = knowhere::AdapterMgr::GetInstance().GetAdapter(index_->index_type());
     if (!adapter->CheckSearch(conf, index_->index_type(), index_->index_mode())) {
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] Illegal search params", "search", 0);
         throw Exception(DB_ERROR, "Illegal search params");
     }
 
@@ -901,7 +906,8 @@ ExecutionEngineImpl::Search(int64_t n, const std::vector<int64_t>& ids, int64_t
         auto result = index_->QueryById(dataset, conf);
         rc.RecordSection("query by id done");
 
-        ENGINE_LOG_DEBUG << "get uids " << index_->GetUids().size() << " from index " << location_;
+        ENGINE_LOG_DEBUG << LogOut("[%s][%ld] get %ld uids from index %s", "search", 0, index_->GetUids().size(),
+                                   location_.c_str());
         MapAndCopyResult(result, uids, offsets.size(), k, distances, labels);
         rc.RecordSection("map uids " + std::to_string(offsets.size() * k));
     }

core/src/db/insert/MemManagerImpl.cpp

@@ -62,10 +62,12 @@ MemManagerImpl::InsertVectors(const std::string& collection_id, int64_t length,
                               const uint8_t* vectors, uint64_t lsn, std::set<std::string>& flushed_tables) {
     flushed_tables.clear();
     if (GetCurrentMem() > options_.insert_buffer_size_) {
-        ENGINE_LOG_DEBUG << "Insert buffer size exceeds limit. Performing force flush";
+        ENGINE_LOG_DEBUG << LogOut("[%s][%ld] ", "insert", 0)
+                         << "Insert buffer size exceeds limit. Performing force flush";
         // TODO(zhiru): Don't apply delete here in order to avoid possible concurrency issues with Merge
         auto status = Flush(flushed_tables, false);
         if (!status.ok()) {
+            ENGINE_LOG_DEBUG << LogOut("[%s][%ld] ", "insert", 0) << "Flush fail: " << status.message();
             return status;
         }
     }

core/src/db/insert/MemTable.cpp

@@ -53,7 +53,7 @@ MemTable::Add(const VectorSourcePtr& source) {
 
         if (!status.ok()) {
             std::string err_msg = "Insert failed: " + status.ToString();
-            ENGINE_LOG_ERROR << err_msg;
+            ENGINE_LOG_ERROR << LogOut("[%s][%ld] ", "insert", 0) << err_msg;
             return Status(DB_ERROR, err_msg);
         }
     }

core/src/db/insert/MemTableFile.cpp

@@ -65,7 +65,7 @@ MemTableFile::Add(const VectorSourcePtr& source) {
         std::string err_msg =
             "MemTableFile::Add: table_file_schema dimension = " + std::to_string(table_file_schema_.dimension_) +
             ", collection_id = " + table_file_schema_.collection_id_;
-        ENGINE_LOG_ERROR << err_msg;
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld]", "insert", 0) << err_msg;
         return Status(DB_ERROR, "Not able to create collection file");
     }
 

core/src/db/insert/VectorSource.cpp

@@ -40,6 +40,7 @@ VectorSource::Add(/*const ExecutionEnginePtr& execution_engine,*/ const segment:
         SafeIDGenerator& id_generator = SafeIDGenerator::GetInstance();
         Status status = id_generator.GetNextIDNumbers(num_vectors_added, vector_ids_to_add);
         if (!status.ok()) {
+            ENGINE_LOG_ERROR << LogOut("[%s][%ld]", "insert", 0) << "Generate ids fail: " << status.message();
             return status;
         }
     } else {
@@ -61,6 +62,7 @@ VectorSource::Add(/*const ExecutionEnginePtr& execution_engine,*/ const segment:
         vectors.resize(size);
         memcpy(vectors.data(), vectors_.float_data_.data() + current_num_vectors_added * table_file_schema.dimension_,
                size);
+        ENGINE_LOG_DEBUG << LogOut("[%s][%ld]", "insert", 0) << "Insert into segment";
         status = segment_writer_ptr->AddVectors(table_file_schema.file_id_, vectors, vector_ids_to_add);
 
     } else if (!vectors_.binary_data_.empty()) {
@@ -77,6 +79,7 @@ VectorSource::Add(/*const ExecutionEnginePtr& execution_engine,*/ const segment:
             vectors.data(),
             vectors_.binary_data_.data() + current_num_vectors_added * SingleVectorSize(table_file_schema.dimension_),
             size);
+        ENGINE_LOG_DEBUG << LogOut("[%s][%ld]", "insert", 0) << "Insert into segment";
         status = segment_writer_ptr->AddVectors(table_file_schema.file_id_, vectors, vector_ids_to_add);
     }
 
@@ -87,7 +90,7 @@ VectorSource::Add(/*const ExecutionEnginePtr& execution_engine,*/ const segment:
         vector_ids_.insert(vector_ids_.end(), std::make_move_iterator(vector_ids_to_add.begin()),
                            std::make_move_iterator(vector_ids_to_add.end()));
     } else {
-        ENGINE_LOG_ERROR << "VectorSource::Add failed: " + status.ToString();
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld]", "insert", 0) << "VectorSource::Add failed: " + status.ToString();
     }
 
     return status;

core/src/db/wal/WalManager.cpp

@@ -243,7 +243,7 @@ WalManager::Insert(const std::string& collection_id, const std::string& partitio
 
     size_t vector_num = vector_ids.size();
     if (vector_num == 0) {
-        WAL_LOG_ERROR << "The ids is empty.";
+        WAL_LOG_ERROR << LogOut("[%s][%ld] The ids is empty.", "insert", 0);
         return false;
     }
     size_t dim = vectors.size() / vector_num;
@@ -265,7 +265,8 @@ WalManager::Insert(const std::string& collection_id, const std::string& partitio
             max_rcd_num = (mxlog_config_.buffer_size - head_size) / unit_size;
         }
         if (max_rcd_num == 0) {
-            WAL_LOG_ERROR << "Wal buffer size is too small " << mxlog_config_.buffer_size << " unit " << unit_size;
+            WAL_LOG_ERROR << LogOut("[%s][%ld]", "insert", 0) << "Wal buffer size is too small "
+                          << mxlog_config_.buffer_size << " unit " << unit_size;
             return false;
         }
 
@@ -290,7 +291,8 @@ WalManager::Insert(const std::string& collection_id, const std::string& partitio
     }
     lck.unlock();
 
-    WAL_LOG_INFO << collection_id << " insert in part " << partition_tag << " with lsn " << new_lsn;
+    WAL_LOG_INFO << LogOut("[%s][%ld]", "insert", 0) << collection_id << " insert in part " << partition_tag
+                 << " with lsn " << new_lsn;
 
     return p_meta_handler_->SetMXLogInternalMeta(new_lsn);
 }

core/src/scheduler/SchedInst.h

@@ -110,14 +110,14 @@ class OptimizerInst {
                     for (auto build_id : build_gpus) {
                         build_msg.append(" gpu" + std::to_string(build_id));
                     }
-                    SERVER_LOG_DEBUG << build_msg;
+                    SERVER_LOG_DEBUG << LogOut("[%s][%d] %s", "search", 0, build_msg.c_str());
 
                     std::string search_msg = "Search gpu:";
                     for (auto search_id : search_gpus) {
                         search_msg.append(" gpu" + std::to_string(search_id));
                     }
                     search_msg.append(". gpu_search_threshold:" + std::to_string(gpu_search_threshold));
-                    SERVER_LOG_DEBUG << search_msg;
+                    SERVER_LOG_DEBUG << LogOut("[%s][%d] %s", "search", 0, build_msg.c_str());
 
                     pass_list.push_back(std::make_shared<BuildIndexPass>());
                     pass_list.push_back(std::make_shared<FaissFlatPass>());

core/src/scheduler/job/SearchJob.cpp

@@ -28,7 +28,7 @@ SearchJob::AddIndexFile(const SegmentSchemaPtr& index_file) {
         return false;
     }
 
-    SERVER_LOG_DEBUG << "SearchJob " << id() << " add index file: " << index_file->id_;
+    SERVER_LOG_DEBUG << LogOut("[%s][%ld] SearchJob %ld add index file: %ld", "search", 0, id(), index_file->id_);
 
     index_files_[index_file->id_] = index_file;
     return true;
@@ -38,7 +38,7 @@ void
 SearchJob::WaitResult() {
     std::unique_lock<std::mutex> lock(mutex_);
     cv_.wait(lock, [this] { return index_files_.empty(); });
-    SERVER_LOG_DEBUG << "SearchJob " << id() << " all done";
+    SERVER_LOG_DEBUG << LogOut("[%s][%ld] SearchJob %ld all done", "search", 0, id());
 }
 
 void
@@ -49,7 +49,7 @@ SearchJob::SearchDone(size_t index_id) {
         cv_.notify_all();
     }
 
-    SERVER_LOG_DEBUG << "SearchJob " << id() << " finish index file: " << index_id;
+    SERVER_LOG_DEBUG << LogOut("[%s][%ld] SearchJob %ld finish index file: %ld", "search", 0, id(), index_id);
 }
 
 ResultIds&

core/src/scheduler/optimizer/FaissFlatPass.cpp

@@ -54,14 +54,16 @@ FaissFlatPass::Run(const TaskPtr& task) {
     auto search_job = std::static_pointer_cast<SearchJob>(search_task->job_.lock());
     ResourcePtr res_ptr;
     if (!gpu_enable_) {
-        SERVER_LOG_DEBUG << "FaissFlatPass: gpu disable, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissFlatPass: gpu disable, specify cpu to search!", "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else if (search_job->nq() < threshold_) {
-        SERVER_LOG_DEBUG << "FaissFlatPass: nq < gpu_search_threshold, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissFlatPass: nq < gpu_search_threshold, specify cpu to search!",
+                                   "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else {
         auto best_device_id = count_ % search_gpus_.size();
-        SERVER_LOG_DEBUG << "FaissFlatPass: nq > gpu_search_threshold, specify gpu" << best_device_id << " to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissFlatPass: nq > gpu_search_threshold, specify gpu %d to search!",
+                                   best_device_id, "search", 0);
         ++count_;
         res_ptr = ResMgrInst::GetInstance()->GetResource(ResourceType::GPU, search_gpus_[best_device_id]);
     }

core/src/scheduler/optimizer/FaissIVFFlatPass.cpp

@@ -55,15 +55,16 @@ FaissIVFFlatPass::Run(const TaskPtr& task) {
     auto search_job = std::static_pointer_cast<SearchJob>(search_task->job_.lock());
     ResourcePtr res_ptr;
     if (!gpu_enable_) {
-        SERVER_LOG_DEBUG << "FaissIVFFlatPass: gpu disable, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFFlatPass: gpu disable, specify cpu to search!", "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else if (search_job->nq() < threshold_) {
-        SERVER_LOG_DEBUG << "FaissIVFFlatPass: nq < gpu_search_threshold, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFFlatPass: nq < gpu_search_threshold, specify cpu to search!",
+                                   "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else {
         auto best_device_id = count_ % search_gpus_.size();
-        SERVER_LOG_DEBUG << "FaissIVFFlatPass: nq > gpu_search_threshold, specify gpu" << best_device_id
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFFlatPass: nq > gpu_search_threshold, specify gpu %d to search!",
-                         << " to search!";
+                                   "search", 0, best_device_id);
         count_++;
         res_ptr = ResMgrInst::GetInstance()->GetResource(ResourceType::GPU, search_gpus_[best_device_id]);
     }

core/src/scheduler/optimizer/FaissIVFPQPass.cpp

@@ -57,14 +57,16 @@ FaissIVFPQPass::Run(const TaskPtr& task) {
     auto search_job = std::static_pointer_cast<SearchJob>(search_task->job_.lock());
     ResourcePtr res_ptr;
     if (!gpu_enable_) {
-        SERVER_LOG_DEBUG << "FaissIVFPQPass: gpu disable, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFPQPass: gpu disable, specify cpu to search!", "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else if (search_job->nq() < threshold_) {
-        SERVER_LOG_DEBUG << "FaissIVFPQPass: nq < gpu_search_threshold, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFPQPass: nq < gpu_search_threshold, specify cpu to search!",
+                                   "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else {
         auto best_device_id = count_ % search_gpus_.size();
-        SERVER_LOG_DEBUG << "FaissIVFPQPass: nq > gpu_search_threshold, specify gpu" << best_device_id << " to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFPQPass: nq > gpu_search_threshold, specify gpu %d to search!",
+                                   "search", 0, best_device_id);
         ++count_;
         res_ptr = ResMgrInst::GetInstance()->GetResource(ResourceType::GPU, search_gpus_[best_device_id]);
     }

core/src/scheduler/optimizer/FaissIVFSQ8HPass.cpp

@@ -54,16 +54,17 @@ FaissIVFSQ8HPass::Run(const TaskPtr& task) {
     auto search_job = std::static_pointer_cast<SearchJob>(search_task->job_.lock());
     ResourcePtr res_ptr;
     if (!gpu_enable_) {
-        SERVER_LOG_DEBUG << "FaissIVFSQ8HPass: gpu disable, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFSQ8HPass: gpu disable, specify cpu to search!", "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     }
     if (search_job->nq() < threshold_) {
-        SERVER_LOG_DEBUG << "FaissIVFSQ8HPass: nq < gpu_search_threshold, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFSQ8HPass: nq < gpu_search_threshold, specify cpu to search!",
+                                   "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else {
         auto best_device_id = count_ % search_gpus_.size();
-        SERVER_LOG_DEBUG << "FaissIVFSQ8HPass: nq > gpu_search_threshold, specify gpu" << best_device_id
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFSQ8HPass: nq > gpu_search_threshold, specify gpu %d to search!",
-                         << " to search!";
+                                   "search", 0, best_device_id);
         ++count_;
         res_ptr = ResMgrInst::GetInstance()->GetResource(ResourceType::GPU, search_gpus_[best_device_id]);
     }

core/src/scheduler/optimizer/FaissIVFSQ8Pass.cpp

@@ -55,15 +55,16 @@ FaissIVFSQ8Pass::Run(const TaskPtr& task) {
     auto search_job = std::static_pointer_cast<SearchJob>(search_task->job_.lock());
     ResourcePtr res_ptr;
     if (!gpu_enable_) {
-        SERVER_LOG_DEBUG << "FaissIVFSQ8Pass: gpu disable, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFSQ8Pass: gpu disable, specify cpu to search!", "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else if (search_job->nq() < threshold_) {
-        SERVER_LOG_DEBUG << "FaissIVFSQ8Pass: nq < gpu_search_threshold, specify cpu to search!";
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFSQ8Pass: nq < gpu_search_threshold, specify cpu to search!",
+                                   "search", 0);
         res_ptr = ResMgrInst::GetInstance()->GetResource("cpu");
     } else {
         auto best_device_id = count_ % search_gpus_.size();
-        SERVER_LOG_DEBUG << "FaissIVFSQ8Pass: nq > gpu_search_threshold, specify gpu" << best_device_id
+        SERVER_LOG_DEBUG << LogOut("[%s][%d] FaissIVFSQ8Pass: nq > gpu_search_threshold, specify gpu %d to search!",
-                         << " to search!";
+                                   "search", 0, best_device_id);
         count_++;
         res_ptr = ResMgrInst::GetInstance()->GetResource(ResourceType::GPU, search_gpus_[best_device_id]);
     }

core/src/scheduler/task/SearchTask.cpp

@@ -132,7 +132,7 @@ void
 XSearchTask::Load(LoadType type, uint8_t device_id) {
     milvus::server::ContextFollower tracer(context_, "XSearchTask::Load " + std::to_string(file_->id_));
 
-    TimeRecorder rc("");
+    TimeRecorder rc(LogOut("[%s][%ld]", "search", 0));
     Status stat = Status::OK();
     std::string error_msg;
     std::string type_str;
@@ -159,6 +159,7 @@ XSearchTask::Load(LoadType type, uint8_t device_id) {
     } catch (std::exception& ex) {
         // typical error: out of disk space or permition denied
         error_msg = "Failed to load index file: " + std::string(ex.what());
+        ENGINE_LOG_ERROR << LogOut("[%s][%ld] Encounter execption: %s", "search", 0, error_msg.c_str());
         stat = Status(SERVER_UNEXPECTED_ERROR, error_msg);
     }
     fiu_do_on("XSearchTask.Load.out_of_memory", stat = Status(SERVER_UNEXPECTED_ERROR, "out of memory"));
@@ -211,7 +212,8 @@ XSearchTask::Execute() {
     //    ENGINE_LOG_DEBUG << "Searching in file id:" << index_id_ << " with "
     //                     << search_contexts_.size() << " tasks";
 
-    TimeRecorder rc("DoSearch file id:" + std::to_string(index_id_));
+    //    TimeRecorder rc("DoSearch file id:" + std::to_string(index_id_));
+    TimeRecorder rc(LogOut("[%s][%ld] DoSearch file id:%ld", "search", 0, index_id_));
 
     server::CollectDurationMetrics metrics(index_type_);
 
@@ -265,7 +267,8 @@ XSearchTask::Execute() {
             // step 3: pick up topk result
             auto spec_k = file_->row_count_ < topk ? file_->row_count_ : topk;
             if (spec_k == 0) {
-                ENGINE_LOG_WARNING << "Searching in an empty file. file location = " << file_->location_;
+                ENGINE_LOG_WARNING << LogOut("[%s][%ld] Searching in an empty file. file location = %s", "search", 0,
+                                             file_->location_.c_str());
             }
 
             {
@@ -286,7 +289,7 @@ XSearchTask::Execute() {
             span = rc.RecordSection(hdr + ", reduce topk");
             //            search_job->AccumReduceCost(span);
         } catch (std::exception& ex) {
-            ENGINE_LOG_ERROR << "SearchTask encounter exception: " << ex.what();
+            ENGINE_LOG_ERROR << LogOut("[%s][%ld] SearchTask encounter exception: %s", "search", 0, ex.what());
             //            search_job->IndexSearchDone(index_id_);//mark as done avoid dead lock, even search failed
         }
 
@@ -305,6 +308,7 @@ XSearchTask::MergeTopkToResultSet(const scheduler::ResultIds& src_ids, const sch
                                   size_t src_k, size_t nq, size_t topk, bool ascending, scheduler::ResultIds& tar_ids,
                                   scheduler::ResultDistances& tar_distances) {
     if (src_ids.empty()) {
+        ENGINE_LOG_DEBUG << LogOut("[%s][%d] Search result is empty.", "search", 0);
         return;
     }
 

core/src/segment/SegmentWriter.cpp

@@ -61,6 +61,7 @@ SegmentWriter::Serialize() {
 
     auto status = WriteBloomFilter();
     if (!status.ok()) {
+        ENGINE_LOG_ERROR << status.message();
         return status;
     }
 
@@ -70,8 +71,10 @@ SegmentWriter::Serialize() {
 
     start = std::chrono::high_resolution_clock::now();
 
+    ENGINE_LOG_DEBUG << "Write vectors";
     status = WriteVectors();
     if (!status.ok()) {
+        ENGINE_LOG_ERROR << "Write vectors fail: " << status.message();
         return status;
     }
 

core/src/server/Server.cpp

@@ -193,6 +193,11 @@ Server::Start() {
 #else
         SERVER_LOG_INFO << "CPU edition";
 #endif
+        /* record config and hardware information into log */
+        LogConfigInFile(config_filename_);
+        LogCpuInfo();
+        LogConfigInMem();
+
         server::Metrics::GetInstance().Init();
         server::SystemInfo::GetInstance().Init();
 

core/src/server/delivery/request/InsertRequest.cpp

@@ -46,28 +46,32 @@ InsertRequest::Create(const std::shared_ptr<milvus::server::Context>& context, c
 
 Status
 InsertRequest::OnExecute() {
+    SERVER_LOG_INFO << LogOut("[%s][%ld] ", "insert", 0) << "Execute insert request.";
     try {
         int64_t vector_count = vectors_data_.vector_count_;
         fiu_do_on("InsertRequest.OnExecute.throw_std_exception", throw std::exception());
         std::string hdr = "InsertRequest(collection=" + collection_name_ + ", n=" + std::to_string(vector_count) +
                           ", partition_tag=" + partition_tag_ + ")";
-        TimeRecorder rc(hdr);
+        TimeRecorder rc(LogOut("[%s][%ld] %s", "insert", 0, hdr.c_str()));
 
         // step 1: check arguments
         auto status = ValidationUtil::ValidateCollectionName(collection_name_);
         if (!status.ok()) {
+            SERVER_LOG_ERROR << LogOut("[%s][%ld] Invalid collection name: %s", "insert", 0, status.message().c_str());
             return status;
         }
         if (vectors_data_.float_data_.empty() && vectors_data_.binary_data_.empty()) {
-            return Status(SERVER_INVALID_ROWRECORD_ARRAY,
+            std::string msg = "The vector array is empty. Make sure you have entered vector records.";
-                          "The vector array is empty. Make sure you have entered vector records.");
+            SERVER_LOG_ERROR << LogOut("[%s][%ld] Invalid records: %s", "insert", 0, msg.c_str());
+            return Status(SERVER_INVALID_ROWRECORD_ARRAY, msg);
         }
 
         fiu_do_on("InsertRequest.OnExecute.id_array_error", vectors_data_.id_array_.resize(vector_count + 1));
         if (!vectors_data_.id_array_.empty()) {
             if (vectors_data_.id_array_.size() != vector_count) {
-                return Status(SERVER_ILLEGAL_VECTOR_ID,
+                std::string msg = "The size of vector ID array must be equal to the size of the vector.";
-                              "The size of vector ID array must be equal to the size of the vector.");
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] Invalid id array: %s", "insert", 0, msg.c_str());
+                return Status(SERVER_ILLEGAL_VECTOR_ID, msg);
             }
         }
 
@@ -80,12 +84,17 @@ InsertRequest::OnExecute() {
         fiu_do_on("InsertRequest.OnExecute.describe_table_fail", status = Status(milvus::SERVER_UNEXPECTED_ERROR, ""));
         if (!status.ok()) {
             if (status.code() == DB_NOT_FOUND) {
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] Collection %s not found", "insert", 0, collection_name_.c_str());
                 return Status(SERVER_TABLE_NOT_EXIST, TableNotExistMsg(collection_name_));
             } else {
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] Describe collection %s fail: %s", "insert", 0,
+                                           collection_name_.c_str(), status.message().c_str());
                 return status;
             }
         } else {
             if (!table_schema.owner_collection_.empty()) {
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] owner collection of %s is empty", "insert", 0,
+                                           collection_name_.c_str());
                 return Status(SERVER_INVALID_TABLE_NAME, TableNotExistMsg(collection_name_));
             }
         }
@@ -97,17 +106,18 @@ InsertRequest::OnExecute() {
                   table_schema.flag_ = engine::meta::FLAG_MASK_HAS_USERID);
         // user already provided id before, all insert action require user id
         if ((table_schema.flag_ & engine::meta::FLAG_MASK_HAS_USERID) != 0 && !user_provide_ids) {
-            return Status(SERVER_ILLEGAL_VECTOR_ID,
+            std::string msg = "Entities IDs are user-defined. Please provide IDs for all entities of the collection.";
-                          "Entities IDs are user-defined. Please provide IDs for all entities of the collection.");
+            SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+            return Status(SERVER_ILLEGAL_VECTOR_ID, msg);
         }
 
         fiu_do_on("InsertRequest.OnExecute.illegal_vector_id2", user_provide_ids = true;
                   table_schema.flag_ = engine::meta::FLAG_MASK_NO_USERID);
         // user didn't provided id before, no need to provide user id
         if ((table_schema.flag_ & engine::meta::FLAG_MASK_NO_USERID) != 0 && user_provide_ids) {
-            return Status(
+            std::string msg =
-                SERVER_ILLEGAL_VECTOR_ID,
+                "Entities IDs are auto-generated. All vectors of this collection must use auto-generated IDs.";
-                "Entities IDs are auto-generated. All vectors of this collection must use auto-generated IDs.");
+            return Status(SERVER_ILLEGAL_VECTOR_ID, msg);
         }
 
         rc.RecordSection("check validation");
@@ -119,34 +129,42 @@ InsertRequest::OnExecute() {
         // step 4: some metric type doesn't support float vectors
         if (!vectors_data_.float_data_.empty()) {  // insert float vectors
             if (engine::utils::IsBinaryMetricType(table_schema.metric_type_)) {
-                return Status(SERVER_INVALID_ROWRECORD_ARRAY, "Collection metric type doesn't support float vectors.");
+                std::string msg = "Collection metric type doesn't support float vectors.";
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+                return Status(SERVER_INVALID_ROWRECORD_ARRAY, msg);
             }
 
             // check prepared float data
             if (vectors_data_.float_data_.size() % vector_count != 0) {
-                return Status(SERVER_INVALID_ROWRECORD_ARRAY,
+                std::string msg = "The vector dimension must be equal to the collection dimension.";
-                              "The vector dimension must be equal to the collection dimension.");
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+                return Status(SERVER_INVALID_ROWRECORD_ARRAY, msg);
             }
 
             fiu_do_on("InsertRequest.OnExecute.invalid_dim", table_schema.dimension_ = -1);
             if (vectors_data_.float_data_.size() / vector_count != table_schema.dimension_) {
-                return Status(SERVER_INVALID_VECTOR_DIMENSION,
+                std::string msg = "The vector dimension must be equal to the collection dimension.";
-                              "The vector dimension must be equal to the collection dimension.");
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+                return Status(SERVER_INVALID_VECTOR_DIMENSION, msg);
             }
         } else if (!vectors_data_.binary_data_.empty()) {  // insert binary vectors
             if (!engine::utils::IsBinaryMetricType(table_schema.metric_type_)) {
-                return Status(SERVER_INVALID_ROWRECORD_ARRAY, "Collection metric type doesn't support binary vectors.");
+                std::string msg = "Collection metric type doesn't support binary vectors.";
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+                return Status(SERVER_INVALID_ROWRECORD_ARRAY, msg);
             }
 
             // check prepared binary data
             if (vectors_data_.binary_data_.size() % vector_count != 0) {
-                return Status(SERVER_INVALID_ROWRECORD_ARRAY,
+                std::string msg = "The vector dimension must be equal to the collection dimension.";
-                              "The vector dimension must be equal to the collection dimension.");
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+                return Status(SERVER_INVALID_ROWRECORD_ARRAY, msg);
             }
 
             if (vectors_data_.binary_data_.size() * 8 / vector_count != table_schema.dimension_) {
-                return Status(SERVER_INVALID_VECTOR_DIMENSION,
+                std::string msg = "The vector dimension must be equal to the collection dimension.";
-                              "The vector dimension must be equal to the collection dimension.");
+                SERVER_LOG_ERROR << LogOut("[%s][%ld] %s", "insert", 0, msg.c_str());
+                return Status(SERVER_INVALID_VECTOR_DIMENSION, msg);
             }
         }
 
@@ -157,6 +175,7 @@ InsertRequest::OnExecute() {
         status = DBWrapper::DB()->InsertVectors(collection_name_, partition_tag_, vectors_data_);
         fiu_do_on("InsertRequest.OnExecute.insert_fail", status = Status(milvus::SERVER_UNEXPECTED_ERROR, ""));
         if (!status.ok()) {
+            SERVER_LOG_ERROR << LogOut("[%s][%ld] Insert fail: %s", "insert", 0, status.message().c_str());
             return status;
         }
 
@@ -165,6 +184,7 @@ InsertRequest::OnExecute() {
         if (ids_size != vec_count) {
             std::string msg =
                 "Add " + std::to_string(vec_count) + " vectors but only return " + std::to_string(ids_size) + " id";
+            SERVER_LOG_ERROR << LogOut("[%s][%ld] Insert fail: %s", "insert", 0, msg.c_str());
             return Status(SERVER_ILLEGAL_VECTOR_ID, msg);
         }
 
@@ -180,6 +200,7 @@ InsertRequest::OnExecute() {
         rc.RecordSection("add vectors to engine");
         rc.ElapseFromBegin("total cost");
     } catch (std::exception& ex) {
+        SERVER_LOG_ERROR << LogOut("[%s][%ld] Encounter exception: %s", "insert", 0, ex.what());
         return Status(SERVER_UNEXPECTED_ERROR, ex.what());
     }
 

core/src/server/delivery/request/SearchRequest.cpp

@@ -10,6 +10,11 @@
 // or implied. See the License for the specific language governing permissions and limitations under the License.
 
 #include "server/delivery/request/SearchRequest.h"
+
+#include <memory>
+
+#include <fiu-local.h>
+
 #include "db/Utils.h"
 #include "server/DBWrapper.h"
 #include "utils/CommonUtil.h"
@@ -17,9 +22,6 @@
 #include "utils/TimeRecorder.h"
 #include "utils/ValidationUtil.h"
 
-#include <fiu-local.h>
-#include <memory>
-
 #ifdef MILVUS_ENABLE_PROFILING
 #include <gperftools/profiler.h>
 #endif
@@ -52,19 +54,22 @@ SearchRequest::Create(const std::shared_ptr<milvus::server::Context>& context, c
 
 Status
 SearchRequest::OnPreExecute() {
+    SERVER_LOG_INFO << LogOut("[%s][%ld] ", "search", 0) << "Search pre-execute. Check search parameters";
     std::string hdr = "SearchRequest pre-execute(collection=" + collection_name_ + ")";
-    TimeRecorderAuto rc(hdr);
+    TimeRecorderAuto rc(LogOut("[%s][%ld] %s", "search", 0, hdr.c_str()));
 
     milvus::server::ContextChild tracer_pre(context_, "Pre Query");
     // step 1: check table name
     auto status = ValidationUtil::ValidateCollectionName(collection_name_);
     if (!status.ok()) {
+        SERVER_LOG_ERROR << LogOut("[%s][%d] %s", "search", 0, status.message().c_str());
         return status;
     }
 
     // step 2: check search topk
     status = ValidationUtil::ValidateSearchTopk(topk_);
     if (!status.ok()) {
+        SERVER_LOG_ERROR << LogOut("[%s][%d] %s", "search", 0, status.message().c_str());
         return status;
     }
 
@@ -72,6 +77,7 @@ SearchRequest::OnPreExecute() {
     status = ValidationUtil::ValidatePartitionTags(partition_list_);
     fiu_do_on("SearchRequest.OnExecute.invalid_partition_tags", status = Status(milvus::SERVER_UNEXPECTED_ERROR, ""));
     if (!status.ok()) {
+        SERVER_LOG_ERROR << LogOut("[%s][%d] %s", "search", 0, status.message().c_str());
         return status;
     }
 
@@ -80,12 +86,13 @@ SearchRequest::OnPreExecute() {
 
 Status
 SearchRequest::OnExecute() {
+    SERVER_LOG_INFO << LogOut("[%s][%ld] ", "search", 0) << "Search execute.";
     try {
         uint64_t vector_count = vectors_data_.vector_count_;
         fiu_do_on("SearchRequest.OnExecute.throw_std_exception", throw std::exception());
         std::string hdr = "SearchRequest execute(collection=" + collection_name_ +
                           ", nq=" + std::to_string(vector_count) + ", k=" + std::to_string(topk_) + ")";
-        TimeRecorderAuto rc(hdr);
+        TimeRecorderAuto rc(LogOut("[%s][%d] %s", "search", 0, hdr.c_str()));
 
         // step 4: check table existence
         // only process root table, ignore partition table
@@ -95,12 +102,17 @@ SearchRequest::OnExecute() {
         fiu_do_on("SearchRequest.OnExecute.describe_table_fail", status = Status(milvus::SERVER_UNEXPECTED_ERROR, ""));
         if (!status.ok()) {
             if (status.code() == DB_NOT_FOUND) {
+                SERVER_LOG_ERROR << LogOut("[%s][%d] Collection %s not found: %s", "search", 0,
+                                           collection_name_.c_str(), status.message().c_str());
                 return Status(SERVER_TABLE_NOT_EXIST, TableNotExistMsg(collection_name_));
             } else {
+                SERVER_LOG_ERROR << LogOut("[%s][%d] Error occurred when describing collection %s: %s", "search", 0,
+                                           collection_name_.c_str(), status.message().c_str());
                 return status;
             }
         } else {
             if (!collection_schema_.owner_collection_.empty()) {
+                SERVER_LOG_ERROR << LogOut("[%s][%d] %s", "search", 0, TableNotExistMsg(collection_name_).c_str());
                 return Status(SERVER_INVALID_TABLE_NAME, TableNotExistMsg(collection_name_));
             }
         }
@@ -108,12 +120,14 @@ SearchRequest::OnExecute() {
         // step 5: check search parameters
         status = ValidationUtil::ValidateSearchParams(extra_params_, collection_schema_, topk_);
         if (!status.ok()) {
+            SERVER_LOG_ERROR << LogOut("[%s][%d] Invalid search params: %s", "search", 0, status.message().c_str());
             return status;
         }
 
         // step 6: check vector data according to metric type
         status = ValidationUtil::ValidateVectorData(vectors_data_, collection_schema_);
         if (!status.ok()) {
+            SERVER_LOG_ERROR << LogOut("[%s][%d] Invalid vector data: %s", "search", 0, status.message().c_str());
             return status;
         }
 
@@ -143,6 +157,7 @@ SearchRequest::OnExecute() {
 #endif
         fiu_do_on("SearchRequest.OnExecute.query_fail", status = Status(milvus::SERVER_UNEXPECTED_ERROR, ""));
         if (!status.ok()) {
+            SERVER_LOG_ERROR << LogOut("[%s][%d] Query fail: %s", "search", 0, status.message().c_str());
             return status;
         }
         fiu_do_on("SearchRequest.OnExecute.empty_result_ids", result_ids.clear());
@@ -157,6 +172,7 @@ SearchRequest::OnExecute() {
         result_.distance_list_.swap(result_distances);
         rc.RecordSection("construct result");
     } catch (std::exception& ex) {
+        SERVER_LOG_ERROR << LogOut("[%s][%d] Encounter exception: %s", "search", 0, ex.what());
         return Status(SERVER_UNEXPECTED_ERROR, ex.what());
     }
 

core/src/server/grpc_impl/GrpcRequestHandler.cpp

@@ -19,6 +19,7 @@
 #include "tracing/TextMapCarrier.h"
 #include "tracing/TracerUtil.h"
 #include "utils/Log.h"
+#include "utils/LogUtil.h"
 #include "utils/TimeRecorder.h"
 
 namespace milvus {
@@ -300,6 +301,8 @@ GrpcRequestHandler::Insert(::grpc::ServerContext* context, const ::milvus::grpc:
                            ::milvus::grpc::VectorIds* response) {
     CHECK_NULLPTR_RETURN(request);
 
+    SERVER_LOG_INFO << LogOut("[%s][%d] Start insert.", "insert", 0);
+
     // step 1: copy vector data
     engine::VectorsData vectors;
     CopyRowRecords(request->row_record_array(), request->row_id_array(), vectors);
@@ -313,6 +316,7 @@ GrpcRequestHandler::Insert(::grpc::ServerContext* context, const ::milvus::grpc:
     memcpy(response->mutable_vector_id_array()->mutable_data(), vectors.id_array_.data(),
            vectors.id_array_.size() * sizeof(int64_t));
 
+    SERVER_LOG_INFO << LogOut("[%s][%d] Insert done.", "insert", 0);
     SET_RESPONSE(response->mutable_status(), status, context);
     return ::grpc::Status::OK;
 }
@@ -364,6 +368,7 @@ GrpcRequestHandler::Search(::grpc::ServerContext* context, const ::milvus::grpc:
                            ::milvus::grpc::TopKQueryResult* response) {
     CHECK_NULLPTR_RETURN(request);
 
+    SERVER_LOG_INFO << LogOut("[%s][%d] Search start in gRPC server", "search", 0);
     // step 1: copy vector data
     engine::VectorsData vectors;
     CopyRowRecords(request->query_record_array(), google::protobuf::RepeatedField<google::protobuf::int64>(), vectors);
@@ -393,6 +398,8 @@ GrpcRequestHandler::Search(::grpc::ServerContext* context, const ::milvus::grpc:
     // step 5: construct and return result
     ConstructResults(result, response);
 
+    SERVER_LOG_INFO << LogOut("[%s][%d] Search done.", "search", 0);
+
     SET_RESPONSE(response->mutable_status(), status, context);
 
     return ::grpc::Status::OK;

core/src/server/web_impl/Constants.h

@@ -40,6 +40,7 @@ static const char* NAME_ENGINE_TYPE_IVFSQ8H = "IVFSQ8H";
 static const char* NAME_ENGINE_TYPE_RNSG = "RNSG";
 static const char* NAME_ENGINE_TYPE_IVFPQ = "IVFPQ";
 static const char* NAME_ENGINE_TYPE_HNSW = "HNSW";
+static const char* NAME_ENGINE_TYPE_ANNOY = "ANNOY";
 
 static const char* NAME_METRIC_TYPE_L2 = "L2";
 static const char* NAME_METRIC_TYPE_IP = "IP";

core/src/server/web_impl/Types.h

@@ -81,6 +81,7 @@ static const std::unordered_map<engine::EngineType, std::string> IndexMap = {
     {engine::EngineType::NSG_MIX, NAME_ENGINE_TYPE_RNSG},
     {engine::EngineType::FAISS_PQ, NAME_ENGINE_TYPE_IVFPQ},
     {engine::EngineType::HNSW, NAME_ENGINE_TYPE_HNSW},
+    {engine::EngineType::ANNOY, NAME_ENGINE_TYPE_ANNOY},
 };
 
 static const std::unordered_map<std::string, engine::EngineType> IndexNameMap = {
@@ -91,6 +92,7 @@ static const std::unordered_map<std::string, engine::EngineType> IndexNameMap =
     {NAME_ENGINE_TYPE_RNSG, engine::EngineType::NSG_MIX},
     {NAME_ENGINE_TYPE_IVFPQ, engine::EngineType::FAISS_PQ},
     {NAME_ENGINE_TYPE_HNSW, engine::EngineType::HNSW},
+    {NAME_ENGINE_TYPE_ANNOY, engine::EngineType::ANNOY},
 };
 
 static const std::unordered_map<engine::MetricType, std::string> MetricMap = {

core/src/utils/Log.cpp

@@ -0,0 +1,34 @@
+// 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.
+#include "utils/Log.h"
+
+#include <cstdarg>
+#include <cstdio>
+#include <memory>
+#include <string>
+
+namespace milvus {
+
+std::string
+LogOut(const char* pattern, ...) {
+    size_t len = strnlen(pattern, 1024) + 256;
+    auto str_p = std::make_unique<char[]>(len);
+    memset(str_p.get(), 0, len);
+
+    va_list vl;
+    va_start(vl, pattern);
+    vsnprintf(str_p.get(), len, pattern, vl);
+    va_end(vl);
+
+    return std::string(str_p.get());
+}
+
+}  // namespace milvus

core/src/utils/Log.h

@@ -11,6 +11,8 @@
 
 #pragma once
 
+#include <string>
+
 #include "easyloggingpp/easylogging++.h"
 
 namespace milvus {
@@ -64,4 +66,8 @@ namespace milvus {
 #define WAL_LOG_ERROR LOG(ERROR) << WAL_DOMAIN_NAME
 #define WAL_LOG_FATAL LOG(FATAL) << WAL_DOMAIN_NAME
 
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+std::string
+LogOut(const char* pattern, ...);
+
 }  // namespace milvus

core/src/utils/LogUtil.cpp

@@ -11,10 +11,15 @@
 
 #include "utils/LogUtil.h"
 
-#include <ctype.h>
 #include <libgen.h>
+#include <cctype>
 #include <string>
 
+#include <yaml-cpp/yaml.h>
+
+#include "config/Config.h"
+#include "utils/Log.h"
+
 namespace milvus {
 namespace server {
 
@@ -86,5 +91,49 @@ InitLog(const std::string& log_config_file) {
     return Status::OK();
 }
 
+void
+LogConfigInFile(const std::string& path) {
+    // TODO(yhz): Check if file exists
+    auto node = YAML::LoadFile(path);
+    YAML::Emitter out;
+    out << node;
+    SERVER_LOG_DEBUG << "\n\n"
+                     << std::string(15, '*') << "Config in file" << std::string(15, '*') << "\n\n"
+                     << out.c_str();
+}
+
+void
+LogConfigInMem() {
+    auto& config = Config::GetInstance();
+    std::string config_str;
+    config.GetConfigJsonStr(config_str, 3);
+    SERVER_LOG_DEBUG << "\n\n"
+                     << std::string(15, '*') << "Config in memory" << std::string(15, '*') << "\n\n"
+                     << config_str;
+}
+
+void
+LogCpuInfo() {
+    /*CPU information*/
+    std::fstream fcpu("/proc/cpuinfo", std::ios::in);
+    if (!fcpu.is_open()) {
+        SERVER_LOG_WARNING << "Cannot obtain CPU information. Open file /proc/cpuinfo fail: " << strerror(errno);
+        return;
+    }
+    std::stringstream cpu_info_ss;
+    cpu_info_ss << fcpu.rdbuf();
+    fcpu.close();
+    std::string cpu_info = cpu_info_ss.str();
+
+    auto processor_pos = cpu_info.rfind("processor");
+    if (std::string::npos == processor_pos) {
+        SERVER_LOG_WARNING << "Cannot obtain CPU information. No sub string \'processor\'";
+        return;
+    }
+
+    auto sub_str = cpu_info.substr(processor_pos);
+    SERVER_LOG_DEBUG << "\n\n" << std::string(15, '*') << "CPU" << std::string(15, '*') << "\n\n" << sub_str;
+}
+
 }  // namespace server
 }  // namespace milvus

core/src/utils/LogUtil.h

@@ -33,5 +33,14 @@ RolloutHandler(const char* filename, std::size_t size, el::Level level);
 #define LOCATION_INFO ""
 #endif
 
+void
+LogConfigInFile(const std::string& path);
+
+void
+LogConfigInMem();
+
+void
+LogCpuInfo();
+
 }  // namespace server
 }  // namespace milvus

core/unittest/CMakeLists.txt

@@ -119,6 +119,7 @@ set(entry_file
 set(helper_files
         ${MILVUS_ENGINE_SRC}/config/Config.cpp
         ${MILVUS_ENGINE_SRC}/utils/CommonUtil.cpp
+        ${MILVUS_ENGINE_SRC}/utils/Log.cpp
         ${MILVUS_ENGINE_SRC}/utils/TimeRecorder.cpp
         ${MILVUS_ENGINE_SRC}/utils/Status.cpp
         ${MILVUS_ENGINE_SRC}/utils/StringHelpFunctions.cpp