diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
index 413d8d8..674ac5b 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
@@ -12,13 +12,18 @@ public class Site {
 
     private String domain;
 
+    /**
+     * for identify a task
+     */
+    private String identifier;
+
     private String userAgent;
 
-    private Map<String,String> cookies = new LinkedHashMap<String, String>();
+    private Map<String, String> cookies = new LinkedHashMap<String, String>();
 
     private String encoding;
 
-    private List<String> startUrls;
+    private List<String> startUrls = new ArrayList<String>();
 
     private int sleepTime = 3000;
 
@@ -34,8 +39,8 @@ public class Site {
         return new Site();
     }
 
-    public Site setCookie(String name,String value) {
-        cookies.put(name,value);
+    public Site setCookie(String name, String value) {
+        cookies.put(name, value);
         return this;
     }
 
@@ -44,7 +49,7 @@ public class Site {
         return this;
     }
 
-    public Map<String,String> getCookies() {
+    public Map<String, String> getCookies() {
         return cookies;
     }
 
@@ -61,6 +66,15 @@ public class Site {
         return this;
     }
 
+    public String getIdentifier() {
+        return identifier;
+    }
+
+    public Site setIdentifier(String identifier) {
+        this.identifier = identifier;
+        return this;
+    }
+
     public String getEncoding() {
         return encoding;
     }
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
index 180d752..7f34850 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
@@ -85,7 +85,6 @@ public class Spider implements Runnable {
             Thread.sleep(time);
         } catch (InterruptedException e) {
             e.printStackTrace();
-            ;
         }
     }
 
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java b/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java
index ca3144e..84a94ce 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java
@@ -33,7 +33,7 @@ public class FilePipeline implements Pipeline {
     public void process(Page page, Site site) {
         String domain = site.getDomain();
         domain = UrlUtils.getDomain(domain);
-        String path = this.path + "" + domain + "/";
+        String path = this.path + "" + domain + "#" + site.getIdentifier() + "/";
         File file = new File(path);
         if (!file.exists()) {
             file.mkdirs();
@@ -46,7 +46,7 @@ public class FilePipeline implements Pipeline {
             }
             printWriter.close();
         } catch (IOException e) {
-            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
+            e.printStackTrace();
         }
 
     }
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/schedular/FileCacheQueueSchedular.java b/webmagic-core/src/main/java/us/codecraft/webmagic/schedular/FileCacheQueueSchedular.java
index 56c5f33..b3086a2 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/schedular/FileCacheQueueSchedular.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/schedular/FileCacheQueueSchedular.java
@@ -60,7 +60,7 @@ public class FileCacheQueueSchedular implements Schedular {
 
     private void init() {
         File file = new File(filePath);
-        if (!file.exists()){
+        if (!file.exists()) {
             file.mkdirs();
         }
         readFile();
@@ -81,8 +81,8 @@ public class FileCacheQueueSchedular implements Schedular {
 
     private void initWriter() {
         try {
-            fileUrlWriter = new PrintWriter(new FileWriter(filePath + site.getDomain() + fileUrlAllName, true));
-            fileCursorWriter = new PrintWriter(new FileWriter(filePath + site.getDomain() + fileCursor, false));
+            fileUrlWriter = new PrintWriter(new FileWriter(getFileName(fileUrlAllName), true));
+            fileCursorWriter = new PrintWriter(new FileWriter(getFileName(fileCursor), false));
         } catch (IOException e) {
             throw new RuntimeException("init cache schedular error", e);
         }
@@ -100,7 +100,7 @@ public class FileCacheQueueSchedular implements Schedular {
 
     private void readUrlFile() throws IOException {
         String line;
-        BufferedReader fileUrlReader = new BufferedReader(new FileReader(filePath + site.getDomain() + fileUrlAllName));
+        BufferedReader fileUrlReader = new BufferedReader(new FileReader(getFileName(fileUrlAllName)));
         int lineReaded = 0;
         while ((line = fileUrlReader.readLine()) != null) {
             urls.add(line.trim());
@@ -112,7 +112,7 @@ public class FileCacheQueueSchedular implements Schedular {
     }
 
     private void readCursorFile() throws IOException {
-        BufferedReader fileCursorReader = new BufferedReader(new FileReader(filePath + site.getDomain() + fileCursor));
+        BufferedReader fileCursorReader = new BufferedReader(new FileReader(getFileName(fileCursor)));
         String line = null;
         //read the last number
         while ((line = fileCursorReader.readLine()) != null) {
@@ -120,8 +120,12 @@ public class FileCacheQueueSchedular implements Schedular {
         }
     }
 
+    private String getFileName(String filename) {
+        return filePath + site.getDomain() + "#" + site.getIdentifier() + filename;
+    }
+
     @Override
-    public synchronized void push(Request request,Site site) {
+    public synchronized void push(Request request, Site site) {
         if (!inited.get()) {
             init();
         }
diff --git a/webmagic-samples/src/test/java/us/codecraft/webmagic/processor/DiaoyuwengProcessorTest.java b/webmagic-samples/src/test/java/us/codecraft/webmagic/processor/DiaoyuwengProcessorTest.java
index 012b5e6..0c24b57 100644
--- a/webmagic-samples/src/test/java/us/codecraft/webmagic/processor/DiaoyuwengProcessorTest.java
+++ b/webmagic-samples/src/test/java/us/codecraft/webmagic/processor/DiaoyuwengProcessorTest.java
@@ -1,6 +1,5 @@
 package us.codecraft.webmagic.processor;
 
-import org.junit.Ignore;
 import org.junit.Test;
 import us.codecraft.webmagic.Spider;
 import us.codecraft.webmagic.pipeline.FilePipeline;
@@ -17,7 +16,6 @@ import java.io.IOException;
  */
 public class DiaoyuwengProcessorTest {
 
-    @Ignore
     @Test
     public void test() throws IOException {
         DiaoyuwengProcessor diaoyuwengProcessor = new DiaoyuwengProcessor();