levy5307 commented on a change in pull request #592:
URL: https://github.com/apache/incubator-pegasus/pull/592#discussion_r486749594



##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA

Review comment:
       You can add a enum to define `READ_HOTSPOT_DATA` and `WRITE_HOTSPOT_DATA`

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA
+        double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
+        int sample_count = 0;
+        for (const auto &partition_datas : _partition_stat_histories) {

Review comment:
       I think `partition_datas` is not a good name, because data is 
uncountable noun

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA
+        double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
+        int sample_count = 0;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    table_qps_sum += partition_data.total_qps[data_type];
+                    sample_count++;
+                }
             }
         }
-        temp_data.pop();
-    }
-    if (sample_count == 0) {
-        ddebug("_partition_stat_histories size == 0");
-        return;
-    }
-    table_qps_avg = table_qps_sum / sample_count;
-    for (const auto &data_sample : data_samples) {
-        standard_deviation += pow((data_sample - table_qps_avg), 2);
-    }
-    standard_deviation = sqrt(standard_deviation / sample_count);
-    const auto &anly_data = _partition_stat_histories.back();
-    for (int i = 0; i < _hot_points.size(); i++) {
-        double hot_point = (anly_data[i].total_qps - table_qps_avg) / 
standard_deviation;
-        // perf_counter->set can only be unsigned __int64
-        // use ceil to guarantee conversion results
-        hot_point = ceil(std::max(hot_point, double(0)));
-        _hot_points[i]->set(hot_point);
+
+        if (sample_count <= 1) {
+            ddebug("_partition_stat_histories size <= 1");
+            return;
+        }
+        table_qps_avg = table_qps_sum / sample_count;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    standard_deviation +=
+                        pow((partition_data.total_qps[data_type] - 
table_qps_avg), 2);
+                }
+            }
+        }
+        standard_deviation = sqrt(standard_deviation / (sample_count - 1));
+        const auto &anly_data = _partition_stat_histories.back();
+        for (int i = 0; i < _hot_points.size(); i++) {
+            double hot_point = 0;
+            if (standard_deviation != 0) {
+                hot_point =
+                    (anly_data[i].total_qps[data_type] - table_qps_avg) / 
standard_deviation;
+            }
+            // perf_counter->set can only be unsigned __int64

Review comment:
       unsigned __int64 --> uint64_t

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA
+        double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
+        int sample_count = 0;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    table_qps_sum += partition_data.total_qps[data_type];
+                    sample_count++;
+                }
             }
         }
-        temp_data.pop();
-    }
-    if (sample_count == 0) {
-        ddebug("_partition_stat_histories size == 0");
-        return;
-    }
-    table_qps_avg = table_qps_sum / sample_count;
-    for (const auto &data_sample : data_samples) {
-        standard_deviation += pow((data_sample - table_qps_avg), 2);
-    }
-    standard_deviation = sqrt(standard_deviation / sample_count);
-    const auto &anly_data = _partition_stat_histories.back();
-    for (int i = 0; i < _hot_points.size(); i++) {
-        double hot_point = (anly_data[i].total_qps - table_qps_avg) / 
standard_deviation;
-        // perf_counter->set can only be unsigned __int64
-        // use ceil to guarantee conversion results
-        hot_point = ceil(std::max(hot_point, double(0)));
-        _hot_points[i]->set(hot_point);
+
+        if (sample_count <= 1) {
+            ddebug("_partition_stat_histories size <= 1");
+            return;
+        }
+        table_qps_avg = table_qps_sum / sample_count;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    standard_deviation +=
+                        pow((partition_data.total_qps[data_type] - 
table_qps_avg), 2);
+                }
+            }
+        }
+        standard_deviation = sqrt(standard_deviation / (sample_count - 1));
+        const auto &anly_data = _partition_stat_histories.back();
+        for (int i = 0; i < _hot_points.size(); i++) {
+            double hot_point = 0;
+            if (standard_deviation != 0) {
+                hot_point =
+                    (anly_data[i].total_qps[data_type] - table_qps_avg) / 
standard_deviation;
+            }
+            // perf_counter->set can only be unsigned __int64

Review comment:
       `unsigned __int64` --> `uint64_t`

##########
File path: src/server/hotspot_partition_data.h
##########
@@ -9,11 +9,21 @@
 namespace pegasus {
 namespace server {
 
+enum partition_qps_type

Review comment:
       ```
   enum partition_qps_type
   {
       READ_HOTSPOT_DATA = 0,
       WRITE_HOTSPOT_DATA,
       HOTSPOT_DATA_TYPE_COUNT
   };
   ```

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA

Review comment:
       `for (int data_type = 0; data_type < HOTSPOT_DATA_TYPE_COUNT; 
data_type++) `

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA

Review comment:
       You can add a enum to define `READ_HOTSPOT_DATA` and `WRITE_HOTSPOT_DATA`

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA
+        double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
+        int sample_count = 0;
+        for (const auto &partition_datas : _partition_stat_histories) {

Review comment:
       I think `partition_datas` is not a good name, because data is 
uncountable noun

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA
+        double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
+        int sample_count = 0;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    table_qps_sum += partition_data.total_qps[data_type];
+                    sample_count++;
+                }
             }
         }
-        temp_data.pop();
-    }
-    if (sample_count == 0) {
-        ddebug("_partition_stat_histories size == 0");
-        return;
-    }
-    table_qps_avg = table_qps_sum / sample_count;
-    for (const auto &data_sample : data_samples) {
-        standard_deviation += pow((data_sample - table_qps_avg), 2);
-    }
-    standard_deviation = sqrt(standard_deviation / sample_count);
-    const auto &anly_data = _partition_stat_histories.back();
-    for (int i = 0; i < _hot_points.size(); i++) {
-        double hot_point = (anly_data[i].total_qps - table_qps_avg) / 
standard_deviation;
-        // perf_counter->set can only be unsigned __int64
-        // use ceil to guarantee conversion results
-        hot_point = ceil(std::max(hot_point, double(0)));
-        _hot_points[i]->set(hot_point);
+
+        if (sample_count <= 1) {
+            ddebug("_partition_stat_histories size <= 1");
+            return;
+        }
+        table_qps_avg = table_qps_sum / sample_count;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    standard_deviation +=
+                        pow((partition_data.total_qps[data_type] - 
table_qps_avg), 2);
+                }
+            }
+        }
+        standard_deviation = sqrt(standard_deviation / (sample_count - 1));
+        const auto &anly_data = _partition_stat_histories.back();
+        for (int i = 0; i < _hot_points.size(); i++) {
+            double hot_point = 0;
+            if (standard_deviation != 0) {
+                hot_point =
+                    (anly_data[i].total_qps[data_type] - table_qps_avg) / 
standard_deviation;
+            }
+            // perf_counter->set can only be unsigned __int64

Review comment:
       unsigned __int64 --> uint64_t

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA
+        double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
+        int sample_count = 0;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    table_qps_sum += partition_data.total_qps[data_type];
+                    sample_count++;
+                }
             }
         }
-        temp_data.pop();
-    }
-    if (sample_count == 0) {
-        ddebug("_partition_stat_histories size == 0");
-        return;
-    }
-    table_qps_avg = table_qps_sum / sample_count;
-    for (const auto &data_sample : data_samples) {
-        standard_deviation += pow((data_sample - table_qps_avg), 2);
-    }
-    standard_deviation = sqrt(standard_deviation / sample_count);
-    const auto &anly_data = _partition_stat_histories.back();
-    for (int i = 0; i < _hot_points.size(); i++) {
-        double hot_point = (anly_data[i].total_qps - table_qps_avg) / 
standard_deviation;
-        // perf_counter->set can only be unsigned __int64
-        // use ceil to guarantee conversion results
-        hot_point = ceil(std::max(hot_point, double(0)));
-        _hot_points[i]->set(hot_point);
+
+        if (sample_count <= 1) {
+            ddebug("_partition_stat_histories size <= 1");
+            return;
+        }
+        table_qps_avg = table_qps_sum / sample_count;
+        for (const auto &partition_datas : _partition_stat_histories) {
+            for (const auto &partition_data : partition_datas) {
+                if (partition_data.total_qps[data_type] > 1.00) {
+                    standard_deviation +=
+                        pow((partition_data.total_qps[data_type] - 
table_qps_avg), 2);
+                }
+            }
+        }
+        standard_deviation = sqrt(standard_deviation / (sample_count - 1));
+        const auto &anly_data = _partition_stat_histories.back();
+        for (int i = 0; i < _hot_points.size(); i++) {
+            double hot_point = 0;
+            if (standard_deviation != 0) {
+                hot_point =
+                    (anly_data[i].total_qps[data_type] - table_qps_avg) / 
standard_deviation;
+            }
+            // perf_counter->set can only be unsigned __int64

Review comment:
       `unsigned __int64` --> `uint64_t`

##########
File path: src/server/hotspot_partition_data.h
##########
@@ -9,11 +9,21 @@
 namespace pegasus {
 namespace server {
 
+enum partition_qps_type

Review comment:
       ```
   enum partition_qps_type
   {
       READ_HOTSPOT_DATA = 0,
       WRITE_HOTSPOT_DATA,
       HOTSPOT_DATA_TYPE_COUNT
   };
   ```

##########
File path: src/server/hotspot_partition_calculator.cpp
##########
@@ -34,67 +35,84 @@ DSN_DEFINE_int64("pegasus.collector",
                  "eliminate outdated historical "
                  "data");
 
-void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partitions)
+void hotspot_partition_calculator::data_aggregate(const std::vector<row_data> 
&partition_stats)
 {
     while (_partition_stat_histories.size() > FLAGS_max_hotspot_store_size - 
1) {
-        _partition_stat_histories.pop();
+        _partition_stat_histories.pop_front();
     }
-    std::vector<hotspot_partition_data> temp(partitions.size());
-    // TODO refactor the data structure
-    for (int i = 0; i < partitions.size(); i++) {
-        temp[i] = std::move(hotspot_partition_data(partitions[i]));
+    std::vector<hotspot_partition_data> temp;
+    for (const auto &partition_stat : partition_stats) {
+        temp.emplace_back(hotspot_partition_data(partition_stat));
     }
-    _partition_stat_histories.emplace(temp);
+    _partition_stat_histories.emplace_back(temp);
 }
 
 void hotspot_partition_calculator::init_perf_counter(int partition_count)
 {
-    std::string counter_name;
-    std::string counter_desc;
+    std::string read_counter_name, write_counter_name;
+    std::string read_counter_desc, write_counter_desc;
     for (int i = 0; i < partition_count; i++) {
-        string partition_desc = _app_name + '.' + std::to_string(i);
-        counter_name = fmt::format("app.stat.hotspots@{}", partition_desc);
-        counter_desc = fmt::format("statistic the hotspots of app {}", 
partition_desc);
-        _hot_points[i].init_app_counter(
-            "app.pegasus", counter_name.c_str(), COUNTER_TYPE_NUMBER, 
counter_desc.c_str());
+        string read_partition_desc = _app_name + '.' + "read." + 
std::to_string(i);
+        read_counter_name = fmt::format("app.stat.hotspots@{}", 
read_partition_desc);
+        read_counter_desc = fmt::format("statistic the hotspots of app {}", 
read_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][READ_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                            
read_counter_name.c_str(),
+                                                            
COUNTER_TYPE_NUMBER,
+                                                            
read_counter_desc.c_str());
+        string write_partition_desc = _app_name + '.' + "write." + 
std::to_string(i);
+        write_counter_name = fmt::format("app.stat.hotspots@{}", 
write_partition_desc);
+        write_counter_desc = fmt::format("statistic the hotspots of app {}", 
write_partition_desc);
+        
_hot_points[i].emplace_back(std::make_unique<dsn::perf_counter_wrapper>());
+        _hot_points[i][WRITE_HOTSPOT_DATA]->init_app_counter("app.pegasus",
+                                                             
write_counter_name.c_str(),
+                                                             
COUNTER_TYPE_NUMBER,
+                                                             
write_counter_desc.c_str());
     }
 }
 
 void hotspot_partition_calculator::data_analyse()
 {
-    dassert(_partition_stat_histories.back().size() == _hot_points.size(),
-            "partition counts error, please check");
-    std::vector<double> data_samples;
-    data_samples.reserve(_partition_stat_histories.size() * 
_hot_points.size());
-    auto temp_data = _partition_stat_histories;
-    double table_qps_sum = 0, standard_deviation = 0, table_qps_avg = 0;
-    int sample_count = 0;
-    while (!temp_data.empty()) {
-        for (const auto &partition_data : temp_data.front()) {
-            if (partition_data.total_qps - 1.00 > 0) {
-                data_samples.push_back(partition_data.total_qps);
-                table_qps_sum += partition_data.total_qps;
-                sample_count++;
+    dcheck_eq(_partition_stat_histories.back().size(), _hot_points.size());
+    for (int data_type = 0; data_type <= 1; data_type++) {
+        // 0: READ_HOTSPOT_DATA; 1: WRITE_HOTSPOT_DATA

Review comment:
       `for (int data_type = 0; data_type < HOTSPOT_DATA_TYPE_COUNT; 
data_type++) `




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