diff --git a/libchinese-segmentation/libchinese-segmentation.pro b/libchinese-segmentation/libchinese-segmentation.pro
index a082395..583f794 100644
--- a/libchinese-segmentation/libchinese-segmentation.pro
+++ b/libchinese-segmentation/libchinese-segmentation.pro
@@ -40,8 +40,10 @@ unix {
 !isEmpty(target.path): INSTALLS += target
 
     header.path = /usr/include/chinese-seg/
-    header.files += *.h cppjieba/*
-    INSTALLS += header header_cppjieba
+    header.files += *.h
+    headercppjieba.path = /usr/include/chinese-seg/cppjieba/
+    headercppjieba.files = cppjieba/*
+    INSTALLS += header headercppjieba
 
 #DISTFILES += \
 #    jiaba/jieba.pri
diff --git a/libsearch/common.h b/libsearch/common.h
new file mode 100644
index 0000000..d3c238c
--- /dev/null
+++ b/libsearch/common.h
@@ -0,0 +1,7 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#define UKUI_SEARCH_PIPE_PATH (QDir::homePath()+"/.config/org.ukui/ukui-search/ukuisearch").toLocal8Bit().constData()
+
+//TODO Put things that needed to be put here here.
+#endif // COMMON_H
diff --git a/libsearch/file-utils.h b/libsearch/file-utils.h
index 0e036bd..a352d63 100644
--- a/libsearch/file-utils.h
+++ b/libsearch/file-utils.h
@@ -56,8 +56,6 @@
 //#define FINISH_CREATING_INDEX 2
 #define MAX_CONTENT_LENGTH 20480000
 
-#define UKUI_SEARCH_PIPE_PATH (QDir::homePath()+"/.config/org.ukui/ukui-search/ukuisearch").toLocal8Bit().constData()
-
 namespace Zeeker {
 class  LIBSEARCH_EXPORT FileUtils {
 public:
diff --git a/libsearch/global-settings.cpp b/libsearch/global-settings.cpp
index aa3e2f7..36d3ba6 100644
--- a/libsearch/global-settings.cpp
+++ b/libsearch/global-settings.cpp
@@ -246,28 +246,16 @@ QStringList GlobalSettings::getSearchRecord() {
 //    return values;
 //}
 
-//here should be override
-//MouseZhangZh
+//this method is designed for main process settings only!!
 void GlobalSettings::setValue(const QString &key, const QVariant &value) {
-    //    qDebug()<<"setvalue========"<<key<<":"<<value;
     m_cache.insert(key, value);
-    //     m_settings->sync();
-//    QtConcurrent::run([ = ]() {
-        //        qDebug()<<m_settings->status();
-//                if (m_mutex.tryLock(1000)) {
-        //        m_mutex.lock();
-
-//    test++;
-//    qDebug()<<"QtConcurrent::run=========start!!!"<<key<<":"<<value<<test<<QTime::currentTime();
-    m_settings->setValue(key, value);
-//    qDebug()<<"QtConcurrent::run=========sync!!!";
-    m_settings->sync();
-//    qDebug()<<"QtConcurrent::run========finished!!!"<<key<<":"<<value<<test<<QTime::currentTime();
-
-        //            qDebug()<<"setvalue========sync!!!"<<key<<":"<<value;
-//                    m_mutex.unlock();
-//                }
-//    });
+    QtConcurrent::run([ = ]() {
+        if (m_mutex.tryLock(1000)) {
+            m_settings->setValue(key, value);
+            m_settings->sync();
+            m_mutex.unlock();
+        }
+    });
 }
 
 void GlobalSettings::forceSync(const QString &key) {
diff --git a/libsearch/global-settings.h b/libsearch/global-settings.h
index e65db6e..7815eb2 100644
--- a/libsearch/global-settings.h
+++ b/libsearch/global-settings.h
@@ -40,10 +40,7 @@
 #define THEME_GSETTINGS_ID "org.ukui.style"
 #define STYLE_NAME_KEY "styleName"
 #define FONT_SIZE_KEY "systemFontSize"
-#define INDEX_DATABASE_STATE "index_database_state"
-#define CONTENT_INDEX_DATABASE_STATE "content_index_database_state"
-#define INDEX_GENERATOR_NORMAL_EXIT "index_generator_normal_exit"
-#define INOTIFY_NORMAL_EXIT "inotify_normal_exit"
+
 #define ENABLE_CREATE_INDEX_ASK_DIALOG "enable_create_index_ask_dialog"
 #define WEB_ENGINE "web_engine"
 #define PATH_EMPTY 1;
diff --git a/libsearch/index/first-index.cpp b/libsearch/index/first-index.cpp
index 2e86104..b8fafb9 100644
--- a/libsearch/index/first-index.cpp
+++ b/libsearch/index/first-index.cpp
@@ -68,9 +68,9 @@ void FirstIndex::run() {
     }
     qDebug() << "create fifo success\n";
 
-    QString indexDataBaseStatus =  GlobalSettings::getInstance()->getValue(INDEX_DATABASE_STATE).toString();
-    QString contentIndexDataBaseStatus = GlobalSettings::getInstance()->getValue(CONTENT_INDEX_DATABASE_STATE).toString();
-    QString inotifyIndexStatus = GlobalSettings::getInstance()->getValue(INOTIFY_NORMAL_EXIT).toString();
+    QString indexDataBaseStatus =  IndexStatusRecorder::getInstance()->getStatus(INDEX_DATABASE_STATE).toString();
+    QString contentIndexDataBaseStatus = IndexStatusRecorder::getInstance()->getStatus(CONTENT_INDEX_DATABASE_STATE).toString();
+    QString inotifyIndexStatus = IndexStatusRecorder::getInstance()->getStatus(INOTIFY_NORMAL_EXIT).toString();
 
     qDebug() << "indexDataBaseStatus: " << indexDataBaseStatus;
     qDebug() << "contentIndexDataBaseStatus: " << contentIndexDataBaseStatus;
@@ -82,8 +82,7 @@ void FirstIndex::run() {
     } else {
         this->bool_dataBaseExist = true;
     }
-//    if(indexDataBaseStatus != "2" || contentIndexDataBaseStatus != "2" || inotifyIndexStatus != "2") {
-    if(indexDataBaseStatus == "1" or contentIndexDataBaseStatus == "1" or inotifyIndexStatus != "2"){
+    if(indexDataBaseStatus != "2" || contentIndexDataBaseStatus != "2" || inotifyIndexStatus != "2") {
         this->bool_dataBaseStatusOK = false;
     } else {
         this->bool_dataBaseStatusOK = true;
@@ -197,8 +196,8 @@ void FirstIndex::run() {
             delete p_indexGenerator;
         p_indexGenerator = nullptr;
 //        GlobalSettings::getInstance()->forceSync();
-        GlobalSettings::getInstance()->setValue(INDEX_DATABASE_STATE, "2");
-        GlobalSettings::getInstance()->setValue(CONTENT_INDEX_DATABASE_STATE, "2");
+        IndexStatusRecorder::getInstance()->setStatus(INDEX_DATABASE_STATE, "2");
+        IndexStatusRecorder::getInstance()->setStatus(CONTENT_INDEX_DATABASE_STATE, "2");
         ::_exit(0);
     } else if(pid < 0) {
         qWarning() << "First Index fork error!!";
@@ -207,7 +206,7 @@ void FirstIndex::run() {
         --FileUtils::_index_status;
     }
 
-    GlobalSettings::getInstance()->setValue(INOTIFY_NORMAL_EXIT, "2");
+    IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "2");
     int retval1 = write(fifo_fd, buffer, strlen(buffer));
     if(retval1 == -1) {
         qWarning("write error\n");
diff --git a/libsearch/index/first-index.h b/libsearch/index/first-index.h
index 9424c3e..7455992 100644
--- a/libsearch/index/first-index.h
+++ b/libsearch/index/first-index.h
@@ -37,11 +37,11 @@
 #include <syslog.h>
 //#include <QtConcurrent>
 #include "traverse_bfs.h"
-#include "global-settings.h"
+#include "index-status-recorder.h"
 #include "index-generator.h"
 #include "inotify-index.h"
 #include "file-utils.h"
-
+#include "common.h"
 namespace Zeeker {
 class FirstIndex : public QThread, public Traverse_BFS {
 public:
diff --git a/libsearch/index/index-generator.cpp b/libsearch/index/index-generator.cpp
index 6affca9..e650271 100644
--- a/libsearch/index/index-generator.cpp
+++ b/libsearch/index/index-generator.cpp
@@ -27,7 +27,6 @@
 #include <QFile>
 #include "file-utils.h"
 #include "index-generator.h"
-#include "global-settings.h"
 #include "chinese-segmentation.h"
 #include "construct-document.h"
 #include <QStandardPaths>
@@ -91,7 +90,7 @@ bool IndexGenerator::creatAllIndex(QQueue<QVector<QString> > *messageList) {
     } catch(const Xapian::Error &e) {
         qWarning() << "creatAllIndex fail!" << QString::fromStdString(e.get_description());
         //need a record
-        GlobalSettings::getInstance()->setValue(INDEX_DATABASE_STATE, "1");
+       IndexStatusRecorder::getInstance()->setStatus(INDEX_DATABASE_STATE, "1");
 //        FileUtils::_index_status &= ~0x1;
         assert(false);
     }
@@ -127,7 +126,7 @@ bool IndexGenerator::creatAllIndex(QQueue<QString> *messageList) {
             m_database_content->commit();
         } catch(const Xapian::Error &e) {
             qWarning() << "creat content Index fail!" << QString::fromStdString(e.get_description());
-            GlobalSettings::getInstance()->setValue(CONTENT_INDEX_DATABASE_STATE, "1");
+            IndexStatusRecorder::getInstance()->setStatus(CONTENT_INDEX_DATABASE_STATE, "1");
 //            FileUtils::_index_status &= ~0x2;
             assert(false);
         }
diff --git a/libsearch/index/index-generator.h b/libsearch/index/index-generator.h
index 80b2355..bc614b2 100644
--- a/libsearch/index/index-generator.h
+++ b/libsearch/index/index-generator.h
@@ -29,8 +29,10 @@
 #include <QMutex>
 #include <QQueue>
 //#include <QMetaObject>
+#include "index-status-recorder.h"
 #include "document.h"
 #include "file-reader.h"
+#include "common.h"
 
 namespace Zeeker {
 extern QList<Document> *_doc_list_path;
diff --git a/libsearch/index/index-status-recorder.cpp b/libsearch/index/index-status-recorder.cpp
new file mode 100644
index 0000000..63cba32
--- /dev/null
+++ b/libsearch/index/index-status-recorder.cpp
@@ -0,0 +1,28 @@
+#include "index-status-recorder.h"
+
+using namespace Zeeker;
+static IndexStatusRecorder *global_instance_indexStatusRecorder = nullptr;
+
+IndexStatusRecorder *IndexStatusRecorder::getInstance()
+{
+    if(!global_instance_indexStatusRecorder) {
+        global_instance_indexStatusRecorder = new IndexStatusRecorder;
+    }
+    return global_instance_indexStatusRecorder;
+}
+
+void IndexStatusRecorder::setStatus(const QString &key, const QVariant &value)
+{
+    m_status->setValue(key, value);
+    m_status->sync();
+}
+
+const QVariant IndexStatusRecorder::getStatus(const QString &key)
+{
+    return m_status->value(key);
+}
+
+IndexStatusRecorder::IndexStatusRecorder(QObject *parent) : QObject(parent)
+{
+    m_status = new QSettings(INDEX_STATUS, QSettings::IniFormat, this);
+}
diff --git a/libsearch/index/index-status-recorder.h b/libsearch/index/index-status-recorder.h
new file mode 100644
index 0000000..25f8009
--- /dev/null
+++ b/libsearch/index/index-status-recorder.h
@@ -0,0 +1,27 @@
+#ifndef INDEXSTATUSRECORDER_H
+#define INDEXSTATUSRECORDER_H
+
+#include <QObject>
+#include <QSettings>
+#include <QDir>
+#define CONTENT_INDEX_DATABASE_STATE "content_index_database_state"
+#define INDEX_DATABASE_STATE "index_database_state"
+#define INOTIFY_NORMAL_EXIT "inotify_normal_exit"
+#define INDEX_STATUS QDir::homePath() + "/.config/org.ukui/ukui-search/ukui-search-index-status.conf"
+namespace Zeeker {
+//fixme: we need a better way to record index status.
+class IndexStatusRecorder : public QObject
+{
+    Q_OBJECT
+public:
+    static IndexStatusRecorder *getInstance();
+    void setStatus(const QString& key, const QVariant& value);
+    const QVariant getStatus(const QString& key);
+
+private:
+    explicit IndexStatusRecorder(QObject *parent = nullptr);
+    QSettings *m_status;
+};
+}
+
+#endif // INDEXSTATUSRECORDER_H
diff --git a/libsearch/index/index.pri b/libsearch/index/index.pri
index 9ae146d..6ceadc6 100644
--- a/libsearch/index/index.pri
+++ b/libsearch/index/index.pri
@@ -6,6 +6,7 @@ HEADERS += \
     $$PWD/file-reader.h \
     $$PWD/first-index.h \
     $$PWD/index-generator.h \
+    $$PWD/index-status-recorder.h \
     $$PWD/inotify-index.h \
     $$PWD/search-manager.h \
     $$PWD/searchmethodmanager.h \
@@ -18,6 +19,7 @@ SOURCES += \
     $$PWD/file-reader.cpp \
     $$PWD/first-index.cpp \
     $$PWD/index-generator.cpp \
+    $$PWD/index-status-recorder.cpp \
     $$PWD/inotify-index.cpp \
     $$PWD/search-manager.cpp \
     $$PWD/searchmethodmanager.cpp \
diff --git a/libsearch/index/inotify-index.cpp b/libsearch/index/inotify-index.cpp
index 5cfe399..0396f9e 100644
--- a/libsearch/index/inotify-index.cpp
+++ b/libsearch/index/inotify-index.cpp
@@ -180,7 +180,7 @@ void InotifyIndex::eventProcess(const char* buf, ssize_t tmp) {
     ssize_t numRead = 0;
     numRead = tmp;
     char * p = const_cast<char*>(buf);
-    GlobalSettings::getInstance()->setValue(INOTIFY_NORMAL_EXIT, "0");
+    IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "0");
     for(; p < buf + numRead;) {
         struct inotify_event * event = reinterpret_cast<inotify_event *>(p);
         if(event->name[0] != '.') {
@@ -237,7 +237,7 @@ void InotifyIndex::eventProcess(const char* buf, ssize_t tmp) {
 next:
         p += sizeof(struct inotify_event) + event->len;
     }
-    GlobalSettings::getInstance()->setValue(INOTIFY_NORMAL_EXIT, "2");
+    IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "2");
     delete indexQueue;
     indexQueue = nullptr;
     delete contentIndexQueue;
@@ -285,11 +285,12 @@ void InotifyIndex::run() {
 
         if(numRead == -1) {
             printf("\033[1;31;40mread event error\033[0m\n");
-            GlobalSettings::getInstance()->setValue(INOTIFY_NORMAL_EXIT, "1");
+            IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "1");
             fflush(stdout);
             assert(false);
         }
 
+        //TODO: Merge multiple signals.
         char * tmp = const_cast<char*>(buf);
 
         for(; tmp < buf + numRead;) {
@@ -334,7 +335,7 @@ void InotifyIndex::run() {
                 if(rc < 0) {
                     // error
                     qWarning() << "select result < 0, error!";
-                    GlobalSettings::getInstance()->setValue(INOTIFY_NORMAL_EXIT, "1");
+                    IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "1");
                     assert(false);
                 } else if(rc == 0) {
                     qDebug() << "select timeout!";
@@ -351,6 +352,7 @@ void InotifyIndex::run() {
                         assert(false);
                     }
 
+                    //TODO: Merge multiple signals.
                     char * tmp = const_cast<char*>(buf);
 
                     for(; tmp < buf + numRead; ) {
@@ -378,7 +380,7 @@ void InotifyIndex::run() {
     }
 
     if(FileUtils::SearchMethod::DIRECTSEARCH == FileUtils::searchMethod) {
-        GlobalSettings::getInstance()->setValue(INOTIFY_NORMAL_EXIT, "3");
+        IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "3");
         RemoveWatch(QStandardPaths::writableLocation(QStandardPaths::HomeLocation), false);
     }
 }
diff --git a/libsearch/index/inotify-index.h b/libsearch/index/inotify-index.h
index b99cef2..fe3dd7b 100644
--- a/libsearch/index/inotify-index.h
+++ b/libsearch/index/inotify-index.h
@@ -27,9 +27,10 @@
 #include "index-generator.h"
 #include "traverse_bfs.h"
 #include "ukui-search-qdbus.h"
-#include "global-settings.h"
+#include "index-status-recorder.h"
 #include "file-utils.h"
 #include "first-index.h"
+#include "common.h"
 
 #define BUF_LEN 1024000
 
diff --git a/libsearch/index/searchmethodmanager.h b/libsearch/index/searchmethodmanager.h
index 62886ba..1c842ca 100644
--- a/libsearch/index/searchmethodmanager.h
+++ b/libsearch/index/searchmethodmanager.h
@@ -3,7 +3,6 @@
 
 #include "first-index.h"
 #include "inotify-index.h"
-
 namespace Zeeker {
 class SearchMethodManager {
 public:
diff --git a/libsearch/libsearch.pro b/libsearch/libsearch.pro
index d5b509c..4b85b0d 100644
--- a/libsearch/libsearch.pro
+++ b/libsearch/libsearch.pro
@@ -42,6 +42,7 @@ SOURCES += \
     libsearch.cpp
 
 HEADERS += \
+    common.h \
     file-utils.h \
     global-settings.h \
     gobject-template.h \