Index: sources/storage/Logger.h
===================================================================
diff -u -r72494685cc15648712935311cb8ff5b208e70cb4 -r630c0a7fe305de7fc1911df4022036c4b10e473e
--- sources/storage/Logger.h	(.../Logger.h)	(revision 72494685cc15648712935311cb8ff5b208e70cb4)
+++ sources/storage/Logger.h	(.../Logger.h)	(revision 630c0a7fe305de7fc1911df4022036c4b10e473e)
@@ -18,6 +18,7 @@
 #include <QObject>
 #include <QDir>
 #include <QFutureWatcher>
+#include <QElapsedTimer>
 
 // Project
 #include "main.h" // Doxygen : do not remove
@@ -83,6 +84,10 @@
     // friends
     friend class ::tst_logging;
 
+    /// TODO
+    /// Separate the logger from the log remove , export , backup
+    /// Then remove the eLogTrtmt from here as well.
+
 public :
     enum LogType {
         eLogNone = -1,
@@ -97,12 +102,36 @@
     };
     Q_ENUM(LogType)
 
+    enum CacheIndex {
+        eCache1 = 0,
+        eCache2 = 1,
+        eCacheIndexCount = 2,
+    };
+
+    Q_ENUM(CacheIndex)
+
+protected:
+    void timerEvent(QTimerEvent *) override;
+
 private:
 
     bool _logStorageReady = true;
 
+    static const int _interval = 1000; //ms = 1 second
+
     const   char *_headerA = "TimeStamp,ID,SubSys,Name,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40";
     const   char *_headerD = "TimeStamp,Description";
+
+    const quint16 _cacheTimeout =    5              ; // seconds timeout until flushes, for slow traffics
+    quint16       _cacheCounter =    _cacheTimeout  ; // seconds timeout counter
+    quint16       _cacheCount   = 2000              ; // K message count
+    QAtomicInt    _cacheIndexA  = eCache1;
+    QAtomicInt    _cacheIndexD  = eCache1;
+    QStringList   _cacheA[eCacheIndexCount];
+    QStringList   _cacheD[eCacheIndexCount];
+    QElapsedTimer _flushElapsedA;
+    QElapsedTimer _flushElapsedD;
+    QElapsedTimer _flushElapsedT;
     QDir    _dir;
 
     // The HSSerial is going to be the HD Serial always,
@@ -153,6 +182,7 @@
         { LogType::eLogTrtmt,  ".txr" }, // Treatment   report
     };
 
+
     // !!!!!!!!!! IMPORTANT !!!!!!!!!!
     // be careful with these percentages
     // please refer to the Storage namespace.
@@ -169,7 +199,8 @@
     const char *_timeFormat     = "HH:mm:ss.zzz"; // timestamp in the file
 
     const char *_fileSeparator  = "_"; // used in filename
-    const char *_separator      = ",";
+    const char *_sepParam       = ",";
+    const char *_sepLines       = "\r\n";
 
     bool        _enableConsoleOut = false;
 
@@ -179,6 +210,9 @@
     LogType              _exportLogsType    = eLogNone;
     QFutureWatcher<bool> _exportLogsWatcher;
     QFutureWatcher<int > _removeLogsWatcher;
+    QFutureWatcher<int > _flushLogsWatcherA;
+    QFutureWatcher<int > _flushLogsWatcherD;
+    QFutureWatcher<int > _flushLogsWatcherT;
 
     QThread       *_thread       = nullptr;
     bool           _init         = false;
@@ -285,7 +319,6 @@
     void         onRemoveLogs();
     void onCryptSetupMount   (bool vPass);
     void  onActionReceive    (GuiActionType vAction, const QVariantList &vData);
-
 signals:
     /*!
      * \brief   didRemoveLogs
@@ -295,6 +328,14 @@
      * \param   vInProgress - true if the log cleanup is in progress, false otherwise.
      */
     void didRemoveLogs(bool vInProgress);
+    /*!
+     * \brief   didFlushLogs
+     * \details notification of the floush log
+     * \param   vInProgress
+     */
+    void didFlushLogsA(bool vInProgress);
+    void didFlushLogsD(bool vInProgress);
+    void didFlushLogsT(bool vInProgress);
 
     // ----- Available space is low
 private slots:
@@ -305,9 +346,20 @@
 
     // ----- logging structure
 private slots:
-    void onLog  (const QString &vContent, LogType vLogType, bool vTimestamp);
+    void onLog              (const QString &vContent, LogType vLogType, bool vTimestamp);
+    bool concurrentFlushLogA();
+    bool concurrentFlushLogD();
+    bool concurrentFlushLogT();
+    void onFlushLogsA();
+    void onFlushLogsD();
+    void onFlushLogsT();
 private:
-    void log    (const QString &vContent, LogType vLogType, bool vTimestamp);
+    bool        logOverflow (LogType vLogType);
+    int         logSwitch   (int vCacheIndex);
+    void        logTimeout  ();
+    void        log         (const QString &vContent, LogType vLogType);
+    int         flush       (                         LogType vLogType);
+    int         flushTimeout();
 
 signals:
     /*!