diff --git a/src/main/java/com/loafle/overflow/crawler/config/Item.java b/src/main/java/com/loafle/overflow/crawler/config/Item.java
index 7fdef3d..3afc081 100644
--- a/src/main/java/com/loafle/overflow/crawler/config/Item.java
+++ b/src/main/java/com/loafle/overflow/crawler/config/Item.java
@@ -8,30 +8,31 @@ import java.util.Map;
  */
 public class Item {
 
-    List<String> metrics;
-    List<String> keys;
-    Map<String,Object> queryInfo;
+    private List<Keys> keys;
+    private QueryInfo queryInfo;
+    private MappingInfo mappingInfo;
 
-    public List<String> getMetrics() {
-        return metrics;
-    }
-    public void setMetrics(List<String> metrics) {
-        this.metrics = metrics;
-    }
-
-    public List<String> getKeys() {
+    public List<Keys> getKeys() {
         return keys;
     }
 
-    public void setKeys(List<String> keys) {
+    public void setKeys(List<Keys> keys) {
         this.keys = keys;
     }
 
-    public Map<String, Object> getQueryInfo() {
+    public QueryInfo getQueryInfo() {
         return queryInfo;
     }
 
-    public void setQueryInfo(Map<String, Object> queryInfo) {
+    public void setQueryInfo(QueryInfo queryInfo) {
         this.queryInfo = queryInfo;
     }
+
+    public MappingInfo getMappingInfo() {
+        return mappingInfo;
+    }
+
+    public void setMappingInfo(MappingInfo mappingInfo) {
+        this.mappingInfo = mappingInfo;
+    }
 }
diff --git a/src/main/java/com/loafle/overflow/crawler/config/Keys.java b/src/main/java/com/loafle/overflow/crawler/config/Keys.java
new file mode 100644
index 0000000..3816531
--- /dev/null
+++ b/src/main/java/com/loafle/overflow/crawler/config/Keys.java
@@ -0,0 +1,26 @@
+package com.loafle.overflow.crawler.config;
+
+/**
+ * Created by root on 17. 4. 26.
+ */
+public class Keys {
+
+    private String metric;
+    private String key;
+
+    public String getMetric() {
+        return metric;
+    }
+
+    public void setMetric(String metric) {
+        this.metric = metric;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+}
diff --git a/src/main/java/com/loafle/overflow/crawler/config/MappingInfo.java b/src/main/java/com/loafle/overflow/crawler/config/MappingInfo.java
new file mode 100644
index 0000000..34e6dde
--- /dev/null
+++ b/src/main/java/com/loafle/overflow/crawler/config/MappingInfo.java
@@ -0,0 +1,46 @@
+package com.loafle.overflow.crawler.config;
+
+import java.util.List;
+
+/**
+ * Created by root on 17. 4. 26.
+ */
+public class MappingInfo {
+
+    private String parseDirection;
+    private List<String> arrayColumns;
+    private List<String> keyColumns;
+    private String valueColumn;
+
+    public String getParseDirection() {
+        return parseDirection;
+    }
+
+    public void setParseDirection(String parseDirection) {
+        this.parseDirection = parseDirection;
+    }
+
+    public List<String> getArrayColumns() {
+        return arrayColumns;
+    }
+
+    public void setArrayColumns(List<String> arrayColumns) {
+        this.arrayColumns = arrayColumns;
+    }
+
+    public List<String> getKeyColumns() {
+        return keyColumns;
+    }
+
+    public void setKeyColumns(List<String> keyColumns) {
+        this.keyColumns = keyColumns;
+    }
+
+    public String getValueColumn() {
+        return valueColumn;
+    }
+
+    public void setValueColumn(String valueColumn) {
+        this.valueColumn = valueColumn;
+    }
+}
diff --git a/src/main/java/com/loafle/overflow/crawler/config/QueryInfo.java b/src/main/java/com/loafle/overflow/crawler/config/QueryInfo.java
new file mode 100644
index 0000000..cef1e60
--- /dev/null
+++ b/src/main/java/com/loafle/overflow/crawler/config/QueryInfo.java
@@ -0,0 +1,27 @@
+package com.loafle.overflow.crawler.config;
+
+import java.util.Map;
+
+/**
+ * Created by root on 17. 4. 26.
+ */
+public class QueryInfo {
+    private String query;
+    private Map<String,String> extend;
+
+    public String getQuery() {
+        return query;
+    }
+
+    public void setQuery(String query) {
+        this.query = query;
+    }
+
+    public Map<String, String> getExtend() {
+        return extend;
+    }
+
+    public void setExtend(Map<String, String> extend) {
+        this.extend = extend;
+    }
+}
diff --git a/src/main/java/com/loafle/overflow/crawler/result/OFResultSet.java b/src/main/java/com/loafle/overflow/crawler/result/OFResultSet.java
index e7acc0b..ad66770 100644
--- a/src/main/java/com/loafle/overflow/crawler/result/OFResultSet.java
+++ b/src/main/java/com/loafle/overflow/crawler/result/OFResultSet.java
@@ -42,7 +42,7 @@ public abstract class OFResultSet {
 
     // methods
     static public OFResultSet newInstance(Item item) {
-        String type = (String) item.getQueryInfo().get("parseDirection");
+        String type = (String) item.getMappingInfo().getParseDirection();
         if (type != null && type.equals("row")) {
             return new OFResultSetRow(item);
         } else {
diff --git a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java
index d30f856..f888ae9 100644
--- a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java
+++ b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java
@@ -1,6 +1,7 @@
 package com.loafle.overflow.crawler.result;
 
 import com.loafle.overflow.crawler.config.Item;
+import com.loafle.overflow.crawler.config.Keys;
 
 import java.util.*;
 
@@ -16,15 +17,15 @@ public class OFResultSetCol extends OFResultSet{
 
     public void setMeta() {
 
-        List<String> meta = this.item.getKeys();
-        List<String> arrayColumns = (List<String>)this.item.getQueryInfo().get("arrayColumns");
+        List<Keys> meta = this.item.getKeys();
+        List<String> arrayColumns = (List<String>)this.item.getMappingInfo().getArrayColumns();
 
         if(this.meta == null) {
             this.meta = new HashMap<>();
         }
 
         for(int indexI = 0; indexI < meta.size(); ++indexI) {
-            this.meta.put(meta.get(indexI), indexI);
+            this.meta.put(meta.get(indexI).getKey(), indexI);
         }
 
         if( arrayColumns != null) {
@@ -39,8 +40,8 @@ public class OFResultSetCol extends OFResultSet{
 
     public Map<String, String> parse() {
 
-        List<String> metrics = this.item.getMetrics();
-        List<String> arrayColumns = (List<String>)this.item.getQueryInfo().get("arrayColumns");
+        List<Keys> metrics = this.item.getKeys();
+        List<String> arrayColumns = (List<String>)this.item.getMappingInfo().getArrayColumns();
 //        this.meta
 
         Map<String, String> resultMap = new HashMap<>();
@@ -72,7 +73,7 @@ public class OFResultSetCol extends OFResultSet{
 
                 for(int indexK = 0 ; indexK < metrics.size(); ++indexK) {
 
-                    metric = metrics.get(indexK);
+                    metric = metrics.get(indexK).getMetric();
 
                     metric = convertMetric(metric, arrayValue);
 
diff --git a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java
index 994a09c..5757aaa 100644
--- a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java
+++ b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java
@@ -1,6 +1,7 @@
 package com.loafle.overflow.crawler.result;
 
 import com.loafle.overflow.crawler.config.Item;
+import com.loafle.overflow.crawler.config.Keys;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -21,9 +22,9 @@ public class OFResultSetRow extends OFResultSet{
 
         List<String> meta = new ArrayList<>();
 
-        List<String> arrayColumns = (List<String>) this.item.getQueryInfo().get("arrayColumns");
-        List<String> keyColumns = (List<String>) this.item.getQueryInfo().get("keyColumns");
-        String valueColumn = (String) this.item.getQueryInfo().get("valueColumn");
+        List<String> arrayColumns = (List<String>) this.item.getMappingInfo().getArrayColumns();
+        List<String> keyColumns = (List<String>) this.item.getMappingInfo().getKeyColumns();
+        String valueColumn = (String) this.item.getMappingInfo().getValueColumn();
         if (arrayColumns != null) {
             for (String c : arrayColumns) {
                 meta.add(c);
@@ -53,7 +54,7 @@ public class OFResultSetRow extends OFResultSet{
 
         Map<String, String> returnMap = new HashMap<>();
 
-        String valueColumn = (String) this.item.getQueryInfo().get("valueColumn");
+        String valueColumn = (String) this.item.getMappingInfo().getValueColumn();
 
         for (List<String> row : this.rows) {
             String key = makeKey(row);
@@ -65,11 +66,11 @@ public class OFResultSetRow extends OFResultSet{
 
     private String makeKey(List<String> data) {
 
-        List<String> metrics = this.item.getMetrics();
+        List<Keys> metrics = this.item.getKeys();
 
-        List<String> arrayColumns = (List<String>) this.item.getQueryInfo().get("arrayColumns");
-        List<String> keyColumns = (List<String>) this.item.getQueryInfo().get("keyColumns");
-        List<String> keys = this.item.getKeys();
+        List<String> arrayColumns = (List<String>) this.item.getMappingInfo().getArrayColumns();
+        List<String> keyColumns = (List<String>) this.item.getMappingInfo().getKeyColumns();
+        List<Keys> keys = this.item.getKeys();
 
         boolean find = false;
         int findIndex = -1;
@@ -85,7 +86,7 @@ public class OFResultSetRow extends OFResultSet{
             if (find == true) {break;}
         }
 
-        String metric = metrics.get(findIndex);
+        String metric = metrics.get(findIndex).getMetric();
 
         if (arrayColumns != null) {
             for (int  i =0 ; i< arrayColumns.size() ; ++i) {
diff --git a/src/test/resources/config/example.json b/src/test/resources/config/example.json
index d7388fa..6e591bc 100644
--- a/src/test/resources/config/example.json
+++ b/src/test/resources/config/example.json
@@ -20,15 +20,28 @@
   },
   "items" : [
     {
-      "query":
+      "keys" : [
         {
-          "queryInfo" : {
-            "query" : "show session status",
-            "direction" : "col"
-          },
-          "keys" : []
+          "metric" : "object[$0].db[$1].datafile_size",
+          "key" : "Data File(s) Size (KB)"
+        },
+        {
+          "metric" : "object[$0].db[$1].logfile_size",
+          "key" : "Log File(s) Size (KB)"
         }
-
+      ],
+      "queryInfo" : {
+        "query": "select object_name,instance_name, counter_name, cntr_value from sys.dm_os_performance_counters where ( counter_name = 'Data File(s) Size (KB)' or counter_name = 'Log File(s) Size (KB)' ) AND object_name = 'SQLServer:Databases'",
+        "extend" : {
+          "command":""
+        }
+      },
+      "mappingInfo" : {
+        "parseDirection" : "row",
+        "arrayColumns" : [ "object_name","instance_name"],
+        "keyColumns" : ["counter_name"],
+        "valueColumn" : "cntr_value"
+      }
     }
   ]
 }
\ No newline at end of file