diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index 5bb6053d49fcc837894354831fa66628152db1f8..8232bd77c0c4c60a84a9ac819f1972619ad89d13 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -23,6 +23,13 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-365 - Use tasktableitemptr instead in event
 - MS-366 - Implement TaskTable
 - MS-368 - Implement cost.cpp
+- MS-371 - Add TaskTableUpdatedEvent
+- MS-373 - Add resource test
+- MS-374 - Add action definition
+- MS-375 - Add Dump implementation for Event
+- MS-376 - Add loader and executor enable flag in Resource avoid diskresource execute task
+- MS-377 - Improve process thread trigger in ResourceMgr, Scheduler and TaskTable
+- MS-378 - Debug and Update normal_test in scheduler unittest
 
 ## New Feature
 - MS-343 - Implement ResourceMgr
diff --git a/cpp/src/scheduler/ResourceMgr.cpp b/cpp/src/scheduler/ResourceMgr.cpp
index a0625c836f28105d259839b0b721872d63058329..916aaa238a0debf8636a637ac4aaf2c953f1aa81 100644
--- a/cpp/src/scheduler/ResourceMgr.cpp
+++ b/cpp/src/scheduler/ResourceMgr.cpp
@@ -33,11 +33,7 @@ ResourceMgr::Add(ResourcePtr &&resource) {
     resources_.emplace_back(resource);
 
     size_t index = resources_.size() - 1;
-    resource->RegisterSubscriber([&](EventPtr event) {
-        queue_.emplace(event);
-        std::unique_lock<std::mutex> lock(event_mutex_);
-        event_cv_.notify_one();
-    });
+    resource->RegisterSubscriber(std::bind(&ResourceMgr::PostEvent, this, std::placeholders::_1));
     return ret;
 }
 
@@ -46,27 +42,11 @@ ResourceMgr::Connect(ResourceWPtr &res1, ResourceWPtr &res2, Connection &connect
     if (auto observe_a = res1.lock()) {
         if (auto observe_b = res2.lock()) {
             observe_a->AddNeighbour(std::static_pointer_cast<Node>(observe_b), connection);
+            observe_b->AddNeighbour(std::static_pointer_cast<Node>(observe_a), connection);
         }
     }
 }
 
-void
-ResourceMgr::EventProcess() {
-    while (running_) {
-        std::unique_lock<std::mutex> lock(event_mutex_);
-        event_cv_.wait(lock, [this] { return !queue_.empty(); });
-
-        if (!running_) {
-            break;
-        }
-
-        auto event = queue_.front();
-        queue_.pop();
-        if (subscriber_) {
-            subscriber_(event);
-        }
-    }
-}
 
 void
 ResourceMgr::Start() {
@@ -74,23 +54,33 @@ ResourceMgr::Start() {
     for (auto &resource : resources_) {
         resource->Start();
     }
-    worker_thread_ = std::thread(&ResourceMgr::EventProcess, this);
-
     running_ = true;
+    worker_thread_ = std::thread(&ResourceMgr::event_process, this);
 }
 
 void
 ResourceMgr::Stop() {
-    std::lock_guard<std::mutex> lck(resources_mutex_);
-
-    running_ = false;
+    {
+        std::lock_guard<std::mutex> lock(event_mutex_);
+        running_ = false;
+        queue_.push(nullptr);
+        event_cv_.notify_one();
+    }
     worker_thread_.join();
 
+    std::lock_guard<std::mutex> lck(resources_mutex_);
     for (auto &resource : resources_) {
         resource->Stop();
     }
 }
 
+void
+ResourceMgr::PostEvent(const EventPtr &event) {
+    std::unique_lock<std::mutex> lock(event_mutex_);
+    queue_.emplace(event);
+    event_cv_.notify_one();
+}
+
 std::string
 ResourceMgr::Dump() {
     std::string str = "ResourceMgr contains " + std::to_string(resources_.size()) + " resources.\n";
@@ -103,6 +93,26 @@ ResourceMgr::Dump() {
     return str;
 }
 
+void
+ResourceMgr::event_process() {
+    while (running_) {
+        std::unique_lock<std::mutex> lock(event_mutex_);
+        event_cv_.wait(lock, [this] { return !queue_.empty(); });
+
+        auto event = queue_.front();
+        if (event == nullptr) {
+            break;
+        }
+
+//        ENGINE_LOG_DEBUG << "ResourceMgr process " << *event;
+
+        queue_.pop();
+        if (subscriber_) {
+            subscriber_(event);
+        }
+    }
+}
+
 }
 }
 }
diff --git a/cpp/src/scheduler/ResourceMgr.h b/cpp/src/scheduler/ResourceMgr.h
index fc7744cd2bdb14d9ef5fa5d0de270da0393524a3..cb2e63193524194971ac9fac197f0b91146fccca 100644
--- a/cpp/src/scheduler/ResourceMgr.h
+++ b/cpp/src/scheduler/ResourceMgr.h
@@ -14,6 +14,7 @@
 #include <condition_variable>
 
 #include "resource/Resource.h"
+#include "utils/Log.h"
 
 
 namespace zilliz {
@@ -59,6 +60,8 @@ public:
     void
     Stop();
 
+    void
+    PostEvent(const EventPtr& event);
 
     // TODO: add stats interface(low)
 
@@ -70,7 +73,7 @@ public:
 
 private:
     void
-    EventProcess();
+    event_process();
 
 private:
     std::queue<EventPtr> queue_;
diff --git a/cpp/src/scheduler/Scheduler.cpp b/cpp/src/scheduler/Scheduler.cpp
index c9d92ccb573f020031809a2b8f3c4e4ed84d7067..06dfa669dbb1c46ea0bc862da4f65896fa80ce66 100644
--- a/cpp/src/scheduler/Scheduler.cpp
+++ b/cpp/src/scheduler/Scheduler.cpp
@@ -4,69 +4,129 @@
  * Proprietary and confidential.
  ******************************************************************************/
 
+#include <iostream>
 #include "Scheduler.h"
 #include "Cost.h"
+#include "action/Action.h"
 
 
 namespace zilliz {
 namespace milvus {
 namespace engine {
 
+Scheduler::Scheduler(ResourceMgrWPtr res_mgr)
+    : running_(false),
+      res_mgr_(std::move(res_mgr)) {
+    if (auto mgr = res_mgr_.lock()) {
+        mgr->RegisterSubscriber(std::bind(&Scheduler::PostEvent, this, std::placeholders::_1));
+    }
+}
+
+
 void
-push_task(ResourcePtr &self, ResourcePtr &other) {
-    auto self_task_table = self->task_table();
-    auto other_task_table = other->task_table();
-    if (!other_task_table.Empty()) {
-        CacheMgr cache;
-        auto indexes = PickToMove(self_task_table, cache, 1);
-        for (auto index : indexes) {
-            if (self_task_table.Move(index)) {
-                auto task = self_task_table.Get(index)->task;
-                other_task_table.Put(task);
-                // TODO: mark moved future
-                other->WakeupLoader();
-                other->WakeupExecutor();
-            }
-        }
+Scheduler::Start() {
+    running_ = true;
+    worker_thread_ = std::thread(&Scheduler::worker_function, this);
+}
+
+void
+Scheduler::Stop() {
+    {
+        std::lock_guard<std::mutex> lock(event_mutex_);
+        running_ = false;
+        event_queue_.push(nullptr);
+        event_cv_.notify_one();
     }
+    worker_thread_.join();
+}
+
+void
+Scheduler::PostEvent(const EventPtr &event) {
+    std::lock_guard<std::mutex> lock(event_mutex_);
+    event_queue_.push(event);
+    event_cv_.notify_one();
+//    SERVER_LOG_DEBUG << "Scheduler post " << *event;
+}
+
+std::string
+Scheduler::Dump() {
+    return std::string();
 }
 
 void
-schedule(const ResourceWPtr &res) {
-    if (auto self = res.lock()) {
-        for (auto &nei : self->GetNeighbours()) {
-            if (auto n = nei.neighbour_node.lock()) {
-                auto neighbour = std::static_pointer_cast<Resource>(n);
-                push_task(self, neighbour);
-            }
+Scheduler::worker_function() {
+    while (running_) {
+        std::unique_lock<std::mutex> lock(event_mutex_);
+        event_cv_.wait(lock, [this] { return !event_queue_.empty(); });
+        auto event = event_queue_.front();
+        if (event == nullptr) {
+            break;
         }
 
+//        SERVER_LOG_DEBUG << "Scheduler process " << *event;
+        event_queue_.pop();
+        Process(event);
+    }
+}
+
+void
+Scheduler::Process(const EventPtr &event) {
+    switch (event->Type()) {
+        case EventType::START_UP: {
+            OnStartUp(event);
+            break;
+        }
+        case EventType::COPY_COMPLETED: {
+            OnCopyCompleted(event);
+            break;
+        }
+        case EventType::FINISH_TASK: {
+            OnFinishTask(event);
+            break;
+        }
+        case EventType::TASK_TABLE_UPDATED: {
+            OnTaskTableUpdated(event);
+            break;
+        }
+        default: {
+            // TODO: logging
+            break;
+        }
     }
 }
 
+
 void
 Scheduler::OnStartUp(const EventPtr &event) {
-    schedule(event->resource_);
+    if (auto resource = event->resource_.lock()) {
+        resource->WakeupLoader();
+    }
 }
 
 void
 Scheduler::OnFinishTask(const EventPtr &event) {
-    schedule(event->resource_);
+    if (auto resource = event->resource_.lock()) {
+        resource->WakeupExecutor();
+    }
 }
 
 void
 Scheduler::OnCopyCompleted(const EventPtr &event) {
-    schedule(event->resource_);
+    if (auto resource = event->resource_.lock()) {
+        resource->WakeupLoader();
+        resource->WakeupExecutor();
+        if (resource->Type()== ResourceType::DISK) {
+            Action::PushTaskToNeighbour(event->resource_);
+        }
+    }
 }
 
 void
 Scheduler::OnTaskTableUpdated(const EventPtr &event) {
-    schedule(event->resource_);
-}
-
-std::string
-Scheduler::Dump() {
-    return std::string();
+//    Action::PushTaskToNeighbour(event->resource_);
+    if (auto resource = event->resource_.lock()) {
+        resource->WakeupLoader();
+    }
 }
 
 }
diff --git a/cpp/src/scheduler/Scheduler.h b/cpp/src/scheduler/Scheduler.h
index 5e50826238c985bf5b66b684ea55feb5588f8cc6..012a479a824aafac9aad46c82a1e6190fd09da54 100644
--- a/cpp/src/scheduler/Scheduler.h
+++ b/cpp/src/scheduler/Scheduler.h
@@ -13,6 +13,7 @@
 
 #include "resource/Resource.h"
 #include "ResourceMgr.h"
+#include "utils/Log.h"
 
 
 namespace zilliz {
@@ -23,20 +24,32 @@ namespace engine {
 class Scheduler {
 public:
     explicit
-    Scheduler(ResourceMgrWPtr res_mgr)
-        : running_(false),
-          res_mgr_(std::move(res_mgr)) {
-//        res_mgr.Register();
-//        res_mgr.Register();
-//        res_mgr.Register();
-//        res_mgr.Register();
-    }
+    Scheduler(ResourceMgrWPtr res_mgr);
 
+    Scheduler(const Scheduler &) = delete;
+    Scheduler(Scheduler &&) = delete;
+
+    /*
+     * Start worker thread;
+     */
+    void
+    Start();
+
+    /*
+     * Stop worker thread, join it;
+     */
     void
-    Start() {
-        worker_thread_ = std::thread(&Scheduler::worker_thread_, this);
-    }
+    Stop();
 
+    /*
+     * Post event to scheduler event queue;
+     */
+    void
+    PostEvent(const EventPtr &event);
+
+    /*
+     * Dump as string;
+     */
     std::string
     Dump();
 
@@ -45,24 +58,37 @@ private:
 
     /*
      * Process start up events;
+     *
+     * Actions:
+     * Pull task from neighbours;
      */
     void
     OnStartUp(const EventPtr &event);
 
     /*
      * Process finish task events;
+     *
+     * Actions:
+     * Pull task from neighbours;
      */
     void
     OnFinishTask(const EventPtr &event);
 
     /*
      * Process copy completed events;
+     *
+     * Actions:
+     * Mark task source MOVED;
+     * Pull task from neighbours;
      */
     void
     OnCopyCompleted(const EventPtr &event);
 
     /*
-     * Process task table updated events;
+     * Process task table updated events, which happened on task_table->put;
+     *
+     * Actions:
+     * Push task to neighbours;
      */
     void
     OnTaskTableUpdated(const EventPtr &event);
@@ -72,40 +98,13 @@ private:
      * Dispatch event to event handler;
      */
     void
-    Process(const EventPtr &event) {
-        switch (event->Type()) {
-            case EventType::START_UP: {
-                OnStartUp(event);
-                break;
-            }
-            case EventType::COPY_COMPLETED: {
-                OnCopyCompleted(event);
-                break;
-            }
-            case EventType::FINISH_TASK: {
-                OnFinishTask(event);
-                break;
-            }
-            case EventType::TASK_TABLE_UPDATED: {
-                OnTaskTableUpdated(event);
-                break;
-            }
-            default: {
-                break;
-            }
-        }
-    }
+    Process(const EventPtr &event);
 
     /*
      * Called by worker_thread_;
      */
     void
-    worker_function() {
-        while (running_) {
-            auto event = event_queue_.front();
-            Process(event);
-        }
-    }
+    worker_function();
 
 private:
     bool running_;
@@ -113,6 +112,8 @@ private:
     ResourceMgrWPtr res_mgr_;
     std::queue<EventPtr> event_queue_;
     std::thread worker_thread_;
+    std::mutex event_mutex_;
+    std::condition_variable event_cv_;
 };
 
 using SchedulerPtr = std::shared_ptr<Scheduler>;
diff --git a/cpp/src/scheduler/TaskTable.cpp b/cpp/src/scheduler/TaskTable.cpp
index 807d35be4ac907baa852956fb0b4446b440dc2ba..7ef033c500510a13667bfbbd0d8e8a7cfe3ae5ba 100644
--- a/cpp/src/scheduler/TaskTable.cpp
+++ b/cpp/src/scheduler/TaskTable.cpp
@@ -7,6 +7,7 @@
 #include "TaskTable.h"
 #include "event/TaskTableUpdatedEvent.h"
 #include <vector>
+#include <sstream>
 
 
 namespace zilliz {
@@ -16,9 +17,11 @@ namespace engine {
 
 void
 TaskTable::Put(TaskPtr task) {
+    std::lock_guard<std::mutex> lock(id_mutex_);
     auto item = std::make_shared<TaskTableItem>();
+    item->id = id_++;
     item->task = std::move(task);
-    item->state = TaskTableItemState::LOADED;
+    item->state = TaskTableItemState::START;
     table_.push_back(item);
     if (subscriber_) {
         subscriber_();
@@ -27,10 +30,12 @@ TaskTable::Put(TaskPtr task) {
 
 void
 TaskTable::Put(std::vector<TaskPtr> &tasks) {
+    std::lock_guard<std::mutex> lock(id_mutex_);
     for (auto &task : tasks) {
         auto item = std::make_shared<TaskTableItem>();
+        item->id = id_++;
         item->task = std::move(task);
-        item->state = TaskTableItemState::LOADED;
+        item->state = TaskTableItemState::START;
         table_.push_back(item);
     }
     if (subscriber_) {
@@ -59,8 +64,8 @@ TaskTable::Move(uint64_t index) {
     auto &task = table_[index];
 
     std::lock_guard<std::mutex> lock(task->mutex);
-    if (task->state == TaskTableItemState::START) {
-        task->state = TaskTableItemState::LOADING;
+    if (task->state == TaskTableItemState::LOADED) {
+        task->state = TaskTableItemState::MOVING;
         return true;
     }
     return false;
@@ -126,9 +131,30 @@ TaskTable::Executed(uint64_t index) {
     return false;
 }
 
+std::string
+ToString(TaskTableItemState state) {
+    switch (state) {
+        case TaskTableItemState::INVALID: return "INVALID";
+        case TaskTableItemState::START: return "START";
+        case TaskTableItemState::LOADING: return "LOADING";
+        case TaskTableItemState::LOADED: return "LOADED";
+        case TaskTableItemState::EXECUTING: return "EXECUTING";
+        case TaskTableItemState::EXECUTED: return "EXECUTED";
+        case TaskTableItemState::MOVING: return "MOVING";
+        case TaskTableItemState::MOVED: return "MOVED";
+        default: return "";
+    }
+}
+
 std::string
 TaskTable::Dump() {
-    return std::string();
+    std::stringstream ss;
+    for (auto &item : table_) {
+        ss << "<" << item->id;
+        ss << ", " << ToString(item->state);
+        ss << ">" << std::endl;
+    }
+    return ss.str();
 }
 
 }
diff --git a/cpp/src/scheduler/TaskTable.h b/cpp/src/scheduler/TaskTable.h
index 70a2899331239c14d7baaf055186a3823ae668a4..8a482d0579a386f2bbbc59ca59c7df3e581938e8 100644
--- a/cpp/src/scheduler/TaskTable.h
+++ b/cpp/src/scheduler/TaskTable.h
@@ -49,6 +49,9 @@ class TaskTable {
 public:
     TaskTable() = default;
 
+    TaskTable(const TaskTable &) = delete;
+    TaskTable(TaskTable &&) = delete;
+
     inline void
     RegisterSubscriber(std::function<void(void)> subscriber) {
         subscriber_ = std::move(subscriber);
@@ -167,6 +170,8 @@ public:
 
 private:
     // TODO: map better ?
+    std::uint64_t id_ = 0;
+    mutable std::mutex id_mutex_;
     std::deque<TaskTableItemPtr> table_;
     std::function<void(void)> subscriber_ = nullptr;
 };
diff --git a/cpp/src/scheduler/action/Action.h b/cpp/src/scheduler/action/Action.h
new file mode 100644
index 0000000000000000000000000000000000000000..d72bbefc8d7bb6ef7630493d85aefacae0781aa5
--- /dev/null
+++ b/cpp/src/scheduler/action/Action.h
@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * copyright 上海赜睿信息科技有限公司(zilliz) - all rights reserved
+ * unauthorized copying of this file, via any medium is strictly prohibited.
+ * proprietary and confidential.
+ ******************************************************************************/
+#pragma once
+
+#include "../resource/Resource.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace engine {
+
+class Action {
+public:
+    /*
+     * Push task to neighbour;
+     */
+    static void
+    PushTaskToNeighbour(const ResourceWPtr &self);
+
+
+    /*
+     * Pull task From neighbour;
+     */
+    static void
+    PullTaskFromNeighbour(const ResourceWPtr &self);
+};
+
+
+}
+}
+}
diff --git a/cpp/src/scheduler/action/PullTaskFromNeighbour.cpp b/cpp/src/scheduler/action/PullTaskFromNeighbour.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b1ac97b6e48a9343f6a8a5e009706a0d30269fc9
--- /dev/null
+++ b/cpp/src/scheduler/action/PullTaskFromNeighbour.cpp
@@ -0,0 +1,24 @@
+/*******************************************************************************
+ * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
+ * Unauthorized copying of this file, via any medium is strictly prohibited.
+ * Proprietary and confidential.
+ ******************************************************************************/
+
+#include "Action.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace engine {
+
+void
+Action::PullTaskFromNeighbour(const ResourceWPtr &self) {
+    // TODO: implement
+}
+
+
+}
+}
+}
+
+
diff --git a/cpp/src/scheduler/action/PushTaskToNeighbour.cpp b/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c99f490f11dc4be4c8d4cf9d61561fa0456c768e
--- /dev/null
+++ b/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
+ * Unauthorized copying of this file, via any medium is strictly prohibited.
+ * Proprietary and confidential.
+ ******************************************************************************/
+
+#include "Action.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace engine {
+
+void
+push_task(ResourcePtr &self, ResourcePtr &other) {
+    auto &self_task_table = self->task_table();
+    auto &other_task_table = other->task_table();
+    CacheMgr cache;
+    auto indexes = PickToMove(self_task_table, cache, 1);
+    for (auto index : indexes) {
+        if (self_task_table.Move(index)) {
+            auto task = self_task_table.Get(index)->task;
+            other_task_table.Put(task);
+            // TODO: mark moved future
+        }
+    }
+}
+
+void
+Action::PushTaskToNeighbour(const ResourceWPtr &res) {
+    if (auto self = res.lock()) {
+        for (auto &neighbour : self->GetNeighbours()) {
+            if (auto n = neighbour.neighbour_node.lock()) {
+                auto neighbour = std::static_pointer_cast<Resource>(n);
+                push_task(self, neighbour);
+            }
+        }
+    }
+}
+
+
+}
+}
+}
+
diff --git a/cpp/src/scheduler/event/CopyCompletedEvent.h b/cpp/src/scheduler/event/CopyCompletedEvent.h
index c84c59333ef149a15549915b97cd3a422c582f14..d2f5ddb0ff22f11e391bcb3a95605c0ad42d2c51 100644
--- a/cpp/src/scheduler/event/CopyCompletedEvent.h
+++ b/cpp/src/scheduler/event/CopyCompletedEvent.h
@@ -18,6 +18,14 @@ public:
     CopyCompletedEvent(std::weak_ptr<Resource> resource, TaskTableItemPtr task_table_item)
         : Event(EventType::COPY_COMPLETED, std::move(resource)),
           task_table_item_(std::move(task_table_item)) {}
+
+    inline std::string
+    Dump() const override {
+        return "<CopyCompletedEvent>";
+    }
+
+    friend std::ostream &operator<<(std::ostream &out, const CopyCompletedEvent &event);
+
 public:
     TaskTableItemPtr task_table_item_;
 };
diff --git a/cpp/src/scheduler/event/Event.h b/cpp/src/scheduler/event/Event.h
index 4b04d5404b5c83e91b73a91b8897a56c1668b2a9..788cfd6a73f2c958b500372952839a02ea12ca8c 100644
--- a/cpp/src/scheduler/event/Event.h
+++ b/cpp/src/scheduler/event/Event.h
@@ -5,6 +5,8 @@
  ******************************************************************************/
 #pragma once
 
+#include <memory>
+
 namespace zilliz {
 namespace milvus {
 namespace engine {
@@ -30,6 +32,13 @@ public:
         return type_;
     }
 
+    inline virtual std::string
+    Dump() const {
+        return "<Event>";
+    }
+
+    friend std::ostream &operator<<(std::ostream &out, const Event &event);
+
 public:
     EventType type_;
     std::weak_ptr<Resource> resource_;
diff --git a/cpp/src/scheduler/event/EventDump.cpp b/cpp/src/scheduler/event/EventDump.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0d10f6f7b4fa4af451e4fffc613f1f1825ebf688
--- /dev/null
+++ b/cpp/src/scheduler/event/EventDump.cpp
@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
+ * Unauthorized copying of this file, via any medium is strictly prohibited.
+ * Proprietary and confidential.
+ ******************************************************************************/
+
+#include "Event.h"
+#include "StartUpEvent.h"
+#include "CopyCompletedEvent.h"
+#include "FinishTaskEvent.h"
+#include "TaskTableUpdatedEvent.h"
+
+
+namespace zilliz {
+namespace milvus {
+namespace engine {
+
+std::ostream &operator<<(std::ostream &out, const Event &event) {
+    out << event.Dump();
+    return out;
+}
+
+std::ostream &operator<<(std::ostream &out, const StartUpEvent &event) {
+    out << event.Dump();
+    return out;
+}
+
+std::ostream &operator<<(std::ostream &out, const CopyCompletedEvent &event) {
+    out << event.Dump();
+    return out;
+}
+
+std::ostream &operator<<(std::ostream &out, const FinishTaskEvent &event) {
+    out << event.Dump();
+    return out;
+}
+
+std::ostream &operator<<(std::ostream &out, const TaskTableUpdatedEvent &event) {
+    out << event.Dump();
+    return out;
+}
+
+}
+}
+}
diff --git a/cpp/src/scheduler/event/FinishTaskEvent.h b/cpp/src/scheduler/event/FinishTaskEvent.h
index 2739bb2fcc87dd7d823ffb7576dcef736147d9f9..14daa9b532949570f50ba273108ac879f65ab792 100644
--- a/cpp/src/scheduler/event/FinishTaskEvent.h
+++ b/cpp/src/scheduler/event/FinishTaskEvent.h
@@ -18,6 +18,13 @@ public:
         : Event(EventType::FINISH_TASK, std::move(resource)),
           task_table_item_(std::move(task_table_item)) {}
 
+    inline std::string
+    Dump() const override {
+        return "<FinishTaskEvent>";
+    }
+
+    friend std::ostream &operator<<(std::ostream &out, const FinishTaskEvent &event);
+
 public:
     TaskTableItemPtr task_table_item_;
 };
diff --git a/cpp/src/scheduler/event/StartUpEvent.h b/cpp/src/scheduler/event/StartUpEvent.h
index 04bc462dccfd0b9a79d80d70eecdc7be567d7e2f..4b5ec78cd683f0695e26d8daffc47cd46aa3339d 100644
--- a/cpp/src/scheduler/event/StartUpEvent.h
+++ b/cpp/src/scheduler/event/StartUpEvent.h
@@ -17,6 +17,13 @@ public:
     explicit
     StartUpEvent(std::weak_ptr<Resource> resource)
         : Event(EventType::START_UP, std::move(resource)) {}
+
+    inline std::string
+    Dump() const override {
+        return "<StartUpEvent>";
+    }
+
+    friend std::ostream &operator<<(std::ostream &out, const StartUpEvent &event);
 };
 
 }
diff --git a/cpp/src/scheduler/event/TaskTableUpdatedEvent.h b/cpp/src/scheduler/event/TaskTableUpdatedEvent.h
index 8658316222cde981bb4942d867d1aff3c7d321ca..f96c30674c5ec6d331fdf321d6bff7b3b6871b74 100644
--- a/cpp/src/scheduler/event/TaskTableUpdatedEvent.h
+++ b/cpp/src/scheduler/event/TaskTableUpdatedEvent.h
@@ -17,6 +17,13 @@ public:
     explicit
     TaskTableUpdatedEvent(std::weak_ptr<Resource> resource)
         : Event(EventType::TASK_TABLE_UPDATED, std::move(resource)) {}
+
+    inline std::string
+    Dump() const override {
+        return "<TaskTableUpdatedEvent>";
+    }
+
+    friend std::ostream &operator<<(std::ostream &out, const TaskTableUpdatedEvent &event);
 };
 
 
diff --git a/cpp/src/scheduler/resource/CpuResource.cpp b/cpp/src/scheduler/resource/CpuResource.cpp
index 32eb62704607c6a471b028fdb73384e9361f8bb1..11c7796187c3dfc0c982c45970e02d7f8ee534a7 100644
--- a/cpp/src/scheduler/resource/CpuResource.cpp
+++ b/cpp/src/scheduler/resource/CpuResource.cpp
@@ -16,21 +16,11 @@ CpuResource::CpuResource(std::string name)
     : Resource(std::move(name), ResourceType::CPU) {}
 
 void CpuResource::LoadFile(TaskPtr task) {
-    //if (src.type == DISK) {
-    //    fd = open(filename);
-    //    content = fd.read();
-    //    close(fd);
-    //} else if (src.type == CPU) {
-    //    memcpy(src, dest, len);
-    //} else if (src.type == GPU) {
-    //    cudaMemcpyD2H(src, dest);
-    //} else {
-    //    // unknown type, exception
-    //}
+    task->Load(LoadType::DISK2CPU, 0);
 }
 
 void CpuResource::Process(TaskPtr task) {
-
+    task->Execute();
 }
 
 }
diff --git a/cpp/src/scheduler/resource/DiskResource.cpp b/cpp/src/scheduler/resource/DiskResource.cpp
index dcc0687ac46c414c1775782ab7f4c5480e5deb45..66cb72b06268bb6bc2917fe8279729abb595f10c 100644
--- a/cpp/src/scheduler/resource/DiskResource.cpp
+++ b/cpp/src/scheduler/resource/DiskResource.cpp
@@ -12,7 +12,8 @@ namespace engine {
 
 
 DiskResource::DiskResource(std::string name)
-    : Resource(std::move(name), ResourceType::DISK) {}
+    : Resource(std::move(name), ResourceType::DISK, true, false) {
+}
 
 void DiskResource::LoadFile(TaskPtr task) {
 
diff --git a/cpp/src/scheduler/resource/GpuResource.cpp b/cpp/src/scheduler/resource/GpuResource.cpp
index 00d5df05b46fd70d9652a9ca618879d7c23f582d..df6827881cafcd250054308ae428d702b6fb1e02 100644
--- a/cpp/src/scheduler/resource/GpuResource.cpp
+++ b/cpp/src/scheduler/resource/GpuResource.cpp
@@ -16,11 +16,11 @@ GpuResource::GpuResource(std::string name)
     : Resource(std::move(name), ResourceType::GPU) {}
 
 void GpuResource::LoadFile(TaskPtr task) {
-
+    task->Load(LoadType::CPU2GPU, 0);
 }
 
 void GpuResource::Process(TaskPtr task) {
-
+    task->Execute();
 }
 
 }
diff --git a/cpp/src/scheduler/resource/Resource.cpp b/cpp/src/scheduler/resource/Resource.cpp
index ea6f71a3591632f82c04c6cb499f6f22a2d89979..ed5d57b7ddaf65f034c378c42273331b0fd51e78 100644
--- a/cpp/src/scheduler/resource/Resource.cpp
+++ b/cpp/src/scheduler/resource/Resource.cpp
@@ -10,10 +10,15 @@ namespace zilliz {
 namespace milvus {
 namespace engine {
 
-Resource::Resource(std::string name, ResourceType type)
+Resource::Resource(std::string name,
+                   ResourceType type,
+                   bool enable_loader,
+                   bool enable_executor)
     : name_(std::move(name)),
       type_(type),
       running_(false),
+      enable_loader_(enable_loader),
+      enable_executor_(enable_executor),
       load_flag_(false),
       exec_flag_(false) {
     task_table_.RegisterSubscriber([&] {
@@ -25,28 +30,43 @@ Resource::Resource(std::string name, ResourceType type)
 }
 
 void Resource::Start() {
-    loader_thread_ = std::thread(&Resource::loader_function, this);
-    executor_thread_ = std::thread(&Resource::executor_function, this);
+    running_ = true;
+    if (enable_loader_) {
+        loader_thread_ = std::thread(&Resource::loader_function, this);
+    }
+    if (enable_executor_) {
+        executor_thread_ = std::thread(&Resource::executor_function, this);
+    }
 }
 
 void Resource::Stop() {
     running_ = false;
-    WakeupLoader();
-    WakeupExecutor();
+    if (enable_loader_) {
+        WakeupLoader();
+        loader_thread_.join();
+    }
+    if (enable_executor_) {
+        WakeupExecutor();
+        executor_thread_.join();
+    }
 }
 
 TaskTable &Resource::task_table() {
     return task_table_;
 }
 
-void Resource::WakeupExecutor() {
-    exec_cv_.notify_one();
-}
-
 void Resource::WakeupLoader() {
+    std::lock_guard<std::mutex> lock(load_mutex_);
+    load_flag_ = true;
     load_cv_.notify_one();
 }
 
+void Resource::WakeupExecutor() {
+    std::lock_guard<std::mutex> lock(exec_mutex_);
+    exec_flag_ = true;
+    exec_cv_.notify_one();
+}
+
 TaskTableItemPtr Resource::pick_task_load() {
     auto indexes = PickToLoad(task_table_, 3);
     for (auto index : indexes) {
@@ -73,9 +93,12 @@ void Resource::loader_function() {
     while (running_) {
         std::unique_lock<std::mutex> lock(load_mutex_);
         load_cv_.wait(lock, [&] { return load_flag_; });
+        load_flag_ = false;
         auto task_item = pick_task_load();
         if (task_item) {
             LoadFile(task_item->task);
+            // TODO: wrapper loaded
+            task_item->state = TaskTableItemState::LOADED;
             if (subscriber_) {
                 auto event = std::make_shared<CopyCompletedEvent>(shared_from_this(), task_item);
                 subscriber_(std::static_pointer_cast<Event>(event));
@@ -85,7 +108,6 @@ void Resource::loader_function() {
 }
 
 void Resource::executor_function() {
-    GetRegisterFunc(RegisterType::START_UP)->Exec();
     if (subscriber_) {
         auto event = std::make_shared<StartUpEvent>(shared_from_this());
         subscriber_(std::static_pointer_cast<Event>(event));
@@ -93,9 +115,11 @@ void Resource::executor_function() {
     while (running_) {
         std::unique_lock<std::mutex> lock(exec_mutex_);
         exec_cv_.wait(lock, [&] { return exec_flag_; });
+        exec_flag_ = false;
         auto task_item = pick_task_execute();
         if (task_item) {
             Process(task_item->task);
+            task_item->state = TaskTableItemState::EXECUTED;
             if (subscriber_) {
                 auto event = std::make_shared<FinishTaskEvent>(shared_from_this(), task_item);
                 subscriber_(std::static_pointer_cast<Event>(event));
diff --git a/cpp/src/scheduler/resource/Resource.h b/cpp/src/scheduler/resource/Resource.h
index ab7aab7bacb58b16afad00d46b376329bdcb5ce1..769661c67b97a308070c5ae68ba462b02f10fe2a 100644
--- a/cpp/src/scheduler/resource/Resource.h
+++ b/cpp/src/scheduler/resource/Resource.h
@@ -76,19 +76,22 @@ public:
 
 public:
     /*
-     * wake up executor;
+     * wake up loader;
      */
     void
-    WakeupExecutor();
+    WakeupLoader();
 
-    /* 
-     * wake up loader;
+    /*
+     * wake up executor;
      */
     void
-    WakeupLoader();
+    WakeupExecutor();
 
 protected:
-    Resource(std::string name, ResourceType type);
+    Resource(std::string name,
+             ResourceType type,
+             bool enable_loader = true,
+             bool enable_executor = true);
 
     // TODO: SearchContextPtr to TaskPtr
     /*
@@ -138,7 +141,6 @@ private:
     void
     executor_function();
 
-
 private:
     std::string name_;
     ResourceType type_;
@@ -149,8 +151,8 @@ private:
     std::function<void(EventPtr)> subscriber_ = nullptr;
 
     bool running_;
-    bool loader_running_ = false;
-    bool executor_running_ = false;
+    bool enable_loader_ = true;
+    bool enable_executor_ = true;
     std::thread loader_thread_;
     std::thread executor_thread_;
 
diff --git a/cpp/unittest/scheduler/CMakeLists.txt b/cpp/unittest/scheduler/CMakeLists.txt
index d47022d317dad186f64dd2605addb58bc476677d..24210cb84de38d86df4d39830d84e4438da302e3 100644
--- a/cpp/unittest/scheduler/CMakeLists.txt
+++ b/cpp/unittest/scheduler/CMakeLists.txt
@@ -14,6 +14,8 @@ aux_source_directory(${MILVUS_ENGINE_SRC}/db/scheduler scheduler_files)
 aux_source_directory(${MILVUS_ENGINE_SRC}/db/scheduler/context scheduler_context_files)
 aux_source_directory(${MILVUS_ENGINE_SRC}/db/scheduler/task scheduler_task_files)
 
+aux_source_directory(${MILVUS_ENGINE_SRC}/scheduler/action scheduler_action_srcs)
+aux_source_directory(${MILVUS_ENGINE_SRC}/scheduler/event scheduler_event_srcs)
 aux_source_directory(${MILVUS_ENGINE_SRC}/scheduler/resource scheduler_resource_srcs)
 aux_source_directory(${MILVUS_ENGINE_SRC}/scheduler/task scheduler_task_srcs)
 aux_source_directory(${MILVUS_ENGINE_SRC}/scheduler scheduler_srcs)
@@ -36,6 +38,8 @@ include_directories(/usr/include/mysql)
 set(scheduler_test_src
         ${unittest_srcs}
         ${test_srcs}
+        ${scheduler_action_srcs}
+        ${scheduler_event_srcs}
         ${scheduler_resource_srcs}
         ${scheduler_task_srcs}
         ${scheduler_srcs}
diff --git a/cpp/unittest/scheduler/cost_test.cpp b/cpp/unittest/scheduler/cost_test.cpp
index 27f1c08254515e52cf1c4f69f30ef68619b55f19..d4c05257d113b4fc27000c4e8873b0e071e8cc04 100644
--- a/cpp/unittest/scheduler/cost_test.cpp
+++ b/cpp/unittest/scheduler/cost_test.cpp
@@ -9,7 +9,7 @@ class CostTest : public ::testing::Test {
 protected:
     void
     SetUp() override {
-        for (uint64_t i = 0; i < 7; ++i) {
+        for (uint64_t i = 0; i < 8; ++i) {
             auto task = std::make_shared<XSearchTask>();
             table_.Put(task);
         }
diff --git a/cpp/unittest/scheduler/node_test.cpp b/cpp/unittest/scheduler/node_test.cpp
index a2249e715b2b16f462cc69656b54037433d68356..f0621043db9e10d198a2503c56f67634cf28760d 100644
--- a/cpp/unittest/scheduler/node_test.cpp
+++ b/cpp/unittest/scheduler/node_test.cpp
@@ -10,6 +10,8 @@ protected:
     SetUp() override {
         node1_ = std::make_shared<Node>();
         node2_ = std::make_shared<Node>();
+        node3_ = std::make_shared<Node>();
+        node4_ = std::make_shared<Node>();
 
         auto pcie = Connection("PCIe", 11.0);
 
diff --git a/cpp/unittest/scheduler/normal_test.cpp b/cpp/unittest/scheduler/normal_test.cpp
index af5d1b91f8d170c03c9ac6d41c3f8b29573e2abf..1123a3fb7ecb9c4b30e2edff52f8b42b421fa779 100644
--- a/cpp/unittest/scheduler/normal_test.cpp
+++ b/cpp/unittest/scheduler/normal_test.cpp
@@ -1,13 +1,14 @@
 #include "scheduler/ResourceFactory.h"
 #include "scheduler/ResourceMgr.h"
 #include "scheduler/Scheduler.h"
+#include "scheduler/task/TestTask.h"
+#include "utils/Log.h"
 #include <gtest/gtest.h>
 
 
 using namespace zilliz::milvus::engine;
 
-TEST(normal_test, DISABLED_test1) {
-
+TEST(normal_test, test1) {
     // ResourceMgr only compose resources, provide unified event
     auto res_mgr = std::make_shared<ResourceMgr>();
     auto disk = res_mgr->Add(ResourceFactory::Create("disk", "ssd"));
@@ -23,17 +24,35 @@ TEST(normal_test, DISABLED_test1) {
 
     res_mgr->Start();
 
-    auto task1 = std::make_shared<XSearchTask>();
-    auto task2 = std::make_shared<XSearchTask>();
+    auto scheduler = new Scheduler(res_mgr);
+    scheduler->Start();
+
+    auto task1 = std::make_shared<TestTask>();
+    auto task2 = std::make_shared<TestTask>();
+    auto task3 = std::make_shared<TestTask>();
+    auto task4 = std::make_shared<TestTask>();
     if (auto observe = disk.lock()) {
         observe->task_table().Put(task1);
         observe->task_table().Put(task2);
-        observe->task_table().Put(task1);
-        observe->task_table().Put(task1);
+        observe->task_table().Put(task3);
+        observe->task_table().Put(task4);
+        std::cout << "disk:" << std::endl;
+        std::cout << observe->task_table().Dump() << std::endl;
     }
 
-    auto scheduler = new Scheduler(res_mgr);
-    scheduler->Start();
+    sleep(5);
+
+    if (auto observe = disk.lock()) {
+        std::cout << "disk:" << std::endl;
+        std::cout << observe->task_table().Dump() << std::endl;
+    }
+    if (auto observe = cpu.lock()) {
+        std::cout << "cpu:" << std::endl;
+        std::cout << observe->task_table().Dump() << std::endl;
+    }
+    scheduler->Stop();
+    res_mgr->Stop();
 
-    while (true) sleep(1);
+    ASSERT_EQ(task1->load_count_, 1);
+    ASSERT_EQ(task1->exec_count_, 1);
 }
diff --git a/cpp/unittest/scheduler/resource_test.cpp b/cpp/unittest/scheduler/resource_test.cpp
index afb484b376775a1f94ca6f13e7900b67e9187247..0395856fea8e4cd68962fd7c48555a2921abc0fa 100644
--- a/cpp/unittest/scheduler/resource_test.cpp
+++ b/cpp/unittest/scheduler/resource_test.cpp
@@ -27,15 +27,28 @@ protected:
         gpu_resource_ = ResourceFactory::Create("gpu");
         flag_ = false;
 
-        auto subscriber = [&](EventPtr) {
+        auto subscriber = [&](EventPtr  event) {
             std::unique_lock<std::mutex> lock(mutex_);
-            flag_ = true;
-            cv_.notify_one();
+            if (event->Type() == EventType::COPY_COMPLETED || event->Type() == EventType::FINISH_TASK) {
+                flag_ = true;
+                cv_.notify_one();
+            }
         };
 
         disk_resource_->RegisterSubscriber(subscriber);
         cpu_resource_->RegisterSubscriber(subscriber);
         gpu_resource_->RegisterSubscriber(subscriber);
+
+        disk_resource_->Start();
+        cpu_resource_->Start();
+        gpu_resource_->Start();
+    }
+
+    void
+    TearDown() override {
+        disk_resource_->Stop();
+        cpu_resource_->Stop();
+        gpu_resource_->Stop();
     }
 
     void
diff --git a/cpp/unittest/scheduler/tasktable_test.cpp b/cpp/unittest/scheduler/tasktable_test.cpp
index a9ad9ebca575ae6507393bd837b05b178ed48fe4..f48db3af2d347e4417de51991a4399cb3e5a2237 100644
--- a/cpp/unittest/scheduler/tasktable_test.cpp
+++ b/cpp/unittest/scheduler/tasktable_test.cpp
@@ -45,8 +45,6 @@ protected:
         invalid_task_ = nullptr;
         task1_ = std::make_shared<XSearchTask>();
         task2_ = std::make_shared<XSearchTask>();
-
-        empty_table_ = TaskTable();
     }
 
     TaskPtr invalid_task_;