diff --git a/webapp/models/DynData.php b/webapp/models/DynData.php
index 730ed4c..1071299 100644
--- a/webapp/models/DynData.php
+++ b/webapp/models/DynData.php
@@ -7,26 +7,111 @@ use phpcommon\SqlHelper;
 
 class DynData extends BaseModel {
 
+    public static function preload()
+    {
+        if (!self::$dynData) {
+            self::$dynData = array();
+            $rows = SqlHelper::ormSelect(
+                myself()->_getSelfMysql(),
+                't_dyndata',
+                array(
+                    'account_id' => myself()->_getAccountId(),
+                )
+            );
+            foreach ($rows as $row) {
+                $key = self::calcKey($row['x'], $row['y']);
+                self::$dynData[$key] = $row['val'];
+            }
+        }
+    }
+
     public static function getV($x, $y, $defVal = 0)
     {
-
+        $key = self::calcKey($x, $y);
+        if (self::$dynData) {
+            return getXVal(self::$dynData, $key, $defVal);
+        } else {
+            ++self::$hitCount;
+            if (self::$hitCount > 5) {
+                self::preload();
+                return self::getV($x, $y, $defVal);
+            } else {
+                $row = SqlHelper::ormSelectOne(
+                    myself()->_getSelfMysql(),
+                    't_dyndata',
+                    array(
+                        'account_id' => myself()->_getAccountId(),
+                        'x' => $x,
+                        'y' => $y,
+                    )
+                );
+                return $row ? $row['val'] : $defVal;
+            }
+        }
     }
 
     public static function setV($x, $y, $defVal)
     {
-
+        $key = self::calcKey($x, $y);
+        self::internalSetV($x, $y, $defVal);
     }
 
     public static function incV($x, $y, $val)
     {
-
+        $key = self::calcKey($x, $y);
+        $oldVal = self::getV($x, $y);
+        self::internalSetV($x, $y, $oldVal + $val);
     }
 
     public static function decV($x, $y, $val)
     {
+        self::incV($x, $y, 0 - $val);
+    }
 
+    public static function calcKey($x, $y)
+    {
+        $key = self::calcKey($x, $y);
+    }
+
+    private static function internalSetV($x, $y, $val)
+    {
+        if (!is_int($x) || !is_int($y)) {
+            die('internalSet type error');
+            return;
+        }
+        if (abs($x) > 0xFFFFFFFF) {
+            die('internalSet x error');
+            return;
+        }
+        if (abs($y) > 0xFFFFFFFF) {
+            die('internalSet y error');
+            return;
+        }
+        $key = self::calcKey($x, $y);
+        SqlHelper::upsert
+            (myself()->_getSelfMysql(),
+             't_dyndata',
+             array(
+                 'account_id' => myself()->_getAccountId(),
+                 'x' => $x,
+                 'y' => $y
+             ),
+             array(
+                 'val' => $val,
+                 'modifytime' => myself()->_getNowTime()
+             ),
+             array(
+                 'account_id' => myself()->_getAccountId(),
+                 'x' => $x,
+                 'y' => $y,
+                 'val' => $val,
+                 'createtime' => myself()->_getNowTime(),
+                 'modifytime' => myself()->_getNowTime()
+             )
+            );
     }
 
     private static $dynData = null;
+    private static $hitCount = 0;
 
 }