diff --git a/internal-service/service-api/pom.xml b/internal-service/service-api/pom.xml
index 0f3df8723d05524346a21d2d4d7e2c2c317b6733..3e3a112a95e7836a0c779994c46604852ed1c38f 100644
--- a/internal-service/service-api/pom.xml
+++ b/internal-service/service-api/pom.xml
@@ -11,5 +11,20 @@
 
     <artifactId>service-api</artifactId>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.dubbo</groupId>
+            <artifactId>dubbo</artifactId>
+        </dependency>
+    </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/internal-service/service-consumer/pom.xml b/internal-service/service-consumer/pom.xml
index efb9a1e09321dde99369fcd16054935c7b18c0ff..3ad3b7b9da7fac1b6e4259968f47f065b6480b0e 100644
--- a/internal-service/service-consumer/pom.xml
+++ b/internal-service/service-consumer/pom.xml
@@ -16,14 +16,6 @@
             <groupId>com.aliware.tianchi</groupId>
             <artifactId>service-api</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.springframework</groupId>
-            <artifactId>spring-context</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.dubbo</groupId>
-            <artifactId>dubbo</artifactId>
-        </dependency>
     </dependencies>
 
     <build>
diff --git a/internal-service/service-consumer/src/main/java/com/aliware/tianchi/MyConsumer.java b/internal-service/service-consumer/src/main/java/com/aliware/tianchi/MyConsumer.java
index 3108833583be9bab6ad23ef110c57ab190a0579e..f69b0e21600b316d484a8e0765bb835efd56e0a0 100644
--- a/internal-service/service-consumer/src/main/java/com/aliware/tianchi/MyConsumer.java
+++ b/internal-service/service-consumer/src/main/java/com/aliware/tianchi/MyConsumer.java
@@ -1,20 +1,47 @@
 package com.aliware.tianchi;
 
 import java.io.IOException;
-import org.springframework.context.support.ClassPathXmlApplicationContext;
+import java.util.Collections;
+import org.apache.dubbo.common.Constants;
+import org.apache.dubbo.common.URL;
+import org.apache.dubbo.config.ApplicationConfig;
+import org.apache.dubbo.config.ReferenceConfig;
+import org.apache.dubbo.config.RegistryConfig;
 
-/**
- * @author guohaoice@gmail.com
- */
+
+/** @author guohaoice@gmail.com */
 public class MyConsumer {
   public static void main(String[] args) throws IOException, InterruptedException {
-    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"classpath:dubbo-consumer.xml"});
-    context.start();
-    HashInterface bean = context.getBean(HashInterface.class);
-    while(true){
+    // 当前应用配置
+    ApplicationConfig application = new ApplicationConfig();
+    application.setName("service-gateway");
+
+    // 连接注册中心配置
+    RegistryConfig registry = new RegistryConfig();
+//    String address="com.aliware.tianchi.HashInterface-"
+//            +"localhost:20880_"
+//            +"localhost:20880";
+//    registry.setAddress("list://localhost:9999");
+    registry.setAddress("N/A");
+//    registry.setParameters(Collections.singletonMap(LIST_URL_KEY,address));
+
+
+    // 注意：ReferenceConfig为重对象，内部封装了与注册中心的连接，以及与服务提供方的连接
+
+    // 引用远程服务
+    ReferenceConfig<HashInterface> reference =
+        new ReferenceConfig<HashInterface>(); // 此实例很重，封装了与注册中心的连接以及与提供者的连接，请自行缓存，否则可能造成内存和连接泄漏
+    reference.setApplication(application);
+    reference.setRegistry(registry); // 多个注册中心可以用setRegistries()
+    reference.setInterface(HashInterface.class);
+//    reference.setUrl(new URL(Constants.DUBBO_PROTOCOL,"localhost",20880,reference.getInterface()));
+    reference.setUrl("localhost:20880");
+
+    // 和本地bean一样使用xxxService
+    HashInterface service = reference.get(); // 注意：此代理对象内部封装了所有通讯细节，对象较重，请缓存复用
+    while (true) {
       Thread.sleep(1000);
-      System.out.println(bean.hash("hahaha"));
+      System.out.println(service.hash("hahaha"));
     }
-//    System.in.read(); // press any key to exit
   }
 }
diff --git a/internal-service/service-consumer/src/main/resources/dubbo-consumer.xml b/internal-service/service-consumer/src/main/resources/dubbo-consumer.xml
index f25a6e957747a7497fe950c196e1d075ec780f46..72f887b84bd131480e6dc43c6f2a9ca3649ffe5d 100644
--- a/internal-service/service-consumer/src/main/resources/dubbo-consumer.xml
+++ b/internal-service/service-consumer/src/main/resources/dubbo-consumer.xml
@@ -9,10 +9,10 @@
     <dubbo:application name="demo-consumer"/>
 
     <!-- use multicast registry center to discover service -->
-    <!--<dubbo:registry address="zookeeper://127.0.0.1:2181"/>-->
+    <dubbo:registry address="list://127.0.0.1:2181"/>
 
     <!-- generate proxy for the remote service, then demoService can be used in the same way as the
     local regular interface -->
-    <dubbo:reference id="directService" check="false" interface="com.aliware.tianchi.HashInterface" url="localhost:20880"/>
+    <dubbo:reference id="directService" check="false" interface="com.aliware.tianchi.HashInterface" />
 
 </beans>
\ No newline at end of file
diff --git a/internal-service/service-consumer/src/main/resources/logback.xml b/internal-service/service-consumer/src/main/resources/logback.xml
new file mode 100644
index 0000000000000000000000000000000000000000..946213798813423e6339cc6a3e5616c78ac9e975
--- /dev/null
+++ b/internal-service/service-consumer/src/main/resources/logback.xml
@@ -0,0 +1,22 @@
+<configuration>
+    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+        <file>service-provider.log</file>
+        <encoder>
+            <pattern>%date %level [%thread] %logger{10} [%file : %line] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="chapters.configuration.Foo" additivity="false">
+        <appender-ref ref="FILE" />
+    </logger>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/internal-service/service-provider/pom.xml b/internal-service/service-provider/pom.xml
index 8e98468370c75939c273630ea521ae781de3cd5e..91ebdbfb8d814d6db4faa884f25b399f3e4aeab8 100644
--- a/internal-service/service-provider/pom.xml
+++ b/internal-service/service-provider/pom.xml
@@ -11,6 +11,7 @@
 
     <artifactId>service-provider</artifactId>
 
+
     <dependencies>
         <dependency>
             <groupId>com.aliware.tianchi</groupId>
@@ -20,13 +21,8 @@
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.apache.dubbo</groupId>
-            <artifactId>dubbo-dependencies-zookeeper</artifactId>
-        </dependency>
     </dependencies>
 
-
     <build>
         <plugins>
             <plugin>
diff --git a/internal-service/service-provider/src/main/java/com/aliware/tianchi/DemoProviderMain.java b/internal-service/service-provider/src/main/java/com/aliware/tianchi/DemoProviderMain.java
index 0f3deec461a60ba38ac939b8cf3c66d1d2124cef..a7fffecc8fbb7262921cd43c091f4da1f05f1a00 100644
--- a/internal-service/service-provider/src/main/java/com/aliware/tianchi/DemoProviderMain.java
+++ b/internal-service/service-provider/src/main/java/com/aliware/tianchi/DemoProviderMain.java
@@ -1,21 +1,66 @@
 package com.aliware.tianchi;
 
 import java.io.IOException;
-import org.springframework.context.support.ClassPathXmlApplicationContext;
+import java.util.List;
+import com.aliware.tianchi.policy.SmallConfig;
+import org.apache.dubbo.config.ApplicationConfig;
+import org.apache.dubbo.config.ProtocolConfig;
+import org.apache.dubbo.config.RegistryConfig;
+import org.apache.dubbo.config.ServiceConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /** @author guohaoice@gmail.com */
 public class DemoProviderMain {
+  private static final Logger LOGGER = LoggerFactory.getLogger(DemoProviderMain.class);
+
   public static void main(String[] args) throws IOException {
-    //      if(args.length!=3){
-    //          throw new IllegalArgumentException("Bad argument number");
-    //      }
-
-    //      String salt=args[0];
-    //      System.out.println(salt);
-    new EmbeddedZooKeeper(2181, false).start();
-    ClassPathXmlApplicationContext context =
-        new ClassPathXmlApplicationContext(new String[] {"classpath:dubbo-provider.xml"});
-    context.start();
+    String env;
+    String salt;
+    if (args.length != 3) {
+      LOGGER.info("No specific args found, use [DEFAULT] to run demo provider");
+      env = "small";
+      salt = "salt_val";
+    } else {
+      env = args[0];
+      salt = args[1];
+    }
+    List<ThrashConfig> configs;
+    switch (env) {
+      case "small":
+        configs = new SmallConfig().allConfig;
+        break;
+      default:
+        configs = new SmallConfig().allConfig;
+    }
+
+    // 当前应用配置
+    ApplicationConfig application = new ApplicationConfig();
+    application.setName("service-provider");
+
+    // 连接注册中心配置
+    RegistryConfig registry = new RegistryConfig();
+    registry.setAddress("N/A");
+
+    // 服务提供者协议配置
+    ProtocolConfig protocol = new ProtocolConfig();
+    protocol.setName("dubbo");
+    protocol.setPort(20880);
+    protocol.setThreads(200);
+
+    // 注意：ServiceConfig为重对象，内部封装了与注册中心的连接，以及开启服务端口
+
+    // 服务提供者暴露服务配置
+    ServiceConfig<HashInterface> service =
+        new ServiceConfig<>(); // 此实例很重，封装了与注册中心的连接，请自行缓存，否则可能造成内存和连接泄漏
+    service.setApplication(application);
+    service.setRegistry(registry); // 多个注册中心可以用setRegistries()
+    service.setProtocol(protocol); // 多个协议可以用setProtocols()
+    service.setInterface(HashInterface.class);
+    service.setRef(new HashServiceImpl(salt, configs));
+
+    // 暴露及注册服务
+    service.export();
     System.in.read(); // press any key to exit
   }
 }
diff --git a/internal-service/service-provider/src/main/java/com/aliware/tianchi/EmbeddedZooKeeper.java b/internal-service/service-provider/src/main/java/com/aliware/tianchi/EmbeddedZooKeeper.java
deleted file mode 100644
index b0b68e3fe4105f12d4d27c8ffc9204931714f3d6..0000000000000000000000000000000000000000
--- a/internal-service/service-provider/src/main/java/com/aliware/tianchi/EmbeddedZooKeeper.java
+++ /dev/null
@@ -1,254 +0,0 @@
-/*
- * Copyright 2014 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.aliware.tianchi;
-
-import java.io.File;
-import java.lang.reflect.Method;
-import java.util.Properties;
-import java.util.UUID;
-import org.apache.zookeeper.server.ServerConfig;
-import org.apache.zookeeper.server.ZooKeeperServerMain;
-import org.apache.zookeeper.server.quorum.QuorumPeerConfig;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.context.SmartLifecycle;
-import org.springframework.util.ErrorHandler;
-import org.springframework.util.SocketUtils;
-
-/**
- * from: https://github.com/spring-projects/spring-xd/blob/v1.3.1.RELEASE/spring-xd-dirt/src/main/java/org/springframework/xd/dirt/zookeeper/ZooKeeperUtils.java
- *
- * Helper class to start an embedded instance of standalone (non clustered) ZooKeeper.
- *
- * NOTE: at least an external standalone server (if not an ensemble) are recommended, even for
-// * {@link org.springframework.xd.dirt.server.singlenode.SingleNodeApplication}
- *
- * @author Patrick Peralta
- * @author Mark Fisher
- * @author David Turanski
- */
-public class EmbeddedZooKeeper implements SmartLifecycle {
-
-    /**
-     * Logger.
-     */
-//    private static final Logger logger = LoggerFactory.getLogger(EmbeddedZooKeeper.class);
-
-    /**
-     * ZooKeeper client port. This will be determined dynamically upon startup.
-     */
-    private final int clientPort;
-
-    /**
-     * Whether to auto-start. Default is true.
-     */
-    private boolean autoStartup = true;
-
-    /**
-     * Lifecycle phase. Default is 0.
-     */
-    private int phase = 0;
-
-    /**
-     * Thread for running the ZooKeeper server.
-     */
-    private volatile Thread zkServerThread;
-
-    /**
-     * ZooKeeper server.
-     */
-    private volatile ZooKeeperServerMain zkServer;
-
-    /**
-     * {@link ErrorHandler} to be invoked if an Exception is thrown from the ZooKeeper server thread.
-     */
-    private ErrorHandler errorHandler;
-
-    private boolean daemon = true;
-
-    /**
-     * Construct an EmbeddedZooKeeper with a random port.
-     */
-    public EmbeddedZooKeeper() {
-        clientPort = SocketUtils.findAvailableTcpPort();
-    }
-
-    /**
-     * Construct an EmbeddedZooKeeper with the provided port.
-     *
-     * @param clientPort  port for ZooKeeper server to bind to
-     */
-    public EmbeddedZooKeeper(int clientPort, boolean daemon) {
-        this.clientPort = clientPort;
-        this.daemon = daemon;
-    }
-
-    /**
-     * Returns the port that clients should use to connect to this embedded server.
-     *
-     * @return dynamically determined client port
-     */
-    public int getClientPort() {
-        return this.clientPort;
-    }
-
-    /**
-     * Specify whether to start automatically. Default is true.
-     *
-     * @param autoStartup whether to start automatically
-     */
-    public void setAutoStartup(boolean autoStartup) {
-        this.autoStartup = autoStartup;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    public boolean isAutoStartup() {
-        return this.autoStartup;
-    }
-
-    /**
-     * Specify the lifecycle phase for the embedded server.
-     *
-     * @param phase the lifecycle phase
-     */
-    public void setPhase(int phase) {
-        this.phase = phase;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    public int getPhase() {
-        return this.phase;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    public boolean isRunning() {
-        return (zkServerThread != null);
-    }
-
-    /**
-     * Start the ZooKeeper server in a background thread.
-     * <p>
-     * Register an error handler via {@link #setErrorHandler} in order to handle
-     * any exceptions thrown during startup or execution.
-     */
-    @Override
-    public synchronized void start() {
-        if (zkServerThread == null) {
-            zkServerThread = new Thread(new ServerRunnable(), "ZooKeeper Server Starter");
-            zkServerThread.setDaemon(daemon);
-            zkServerThread.start();
-        }
-    }
-
-    /**
-     * Shutdown the ZooKeeper server.
-     */
-    @Override
-    public synchronized void stop() {
-        if (zkServerThread != null) {
-            // The shutdown method is protected...thus this hack to invoke it.
-            // This will log an exception on shutdown; see
-            // https://issues.apache.org/jira/browse/ZOOKEEPER-1873 for details.
-            try {
-                Method shutdown = ZooKeeperServerMain.class.getDeclaredMethod("shutdown");
-                shutdown.setAccessible(true);
-                shutdown.invoke(zkServer);
-            }
-
-            catch (Exception e) {
-                throw new RuntimeException(e);
-            }
-
-            // It is expected that the thread will exit after
-            // the server is shutdown; this will block until
-            // the shutdown is complete.
-            try {
-                zkServerThread.join(5000);
-                zkServerThread = null;
-            }
-            catch (InterruptedException e) {
-                Thread.currentThread().interrupt();
-//                logger.warn("Interrupted while waiting for embedded ZooKeeper to exit");
-                // abandoning zk thread
-                zkServerThread = null;
-            }
-        }
-    }
-
-    /**
-     * Stop the server if running and invoke the callback when complete.
-     */
-    @Override
-    public void stop(Runnable callback) {
-        stop();
-        callback.run();
-    }
-
-    /**
-     * Provide an {@link ErrorHandler} to be invoked if an Exception is thrown from the ZooKeeper server thread. If none
-     * is provided, only error-level logging will occur.
-     *
-     * @param errorHandler the {@link ErrorHandler} to be invoked
-     */
-    public void setErrorHandler(ErrorHandler errorHandler) {
-        this.errorHandler = errorHandler;
-    }
-
-    /**
-     * Runnable implementation that starts the ZooKeeper server.
-     */
-    private class ServerRunnable implements Runnable {
-
-        @Override
-        public void run() {
-            try {
-                Properties properties = new Properties();
-                File file = new File(System.getProperty("java.io.tmpdir")
-                    + File.separator + UUID.randomUUID());
-                file.deleteOnExit();
-                properties.setProperty("dataDir", file.getAbsolutePath());
-                properties.setProperty("clientPort", String.valueOf(clientPort));
-
-                QuorumPeerConfig quorumPeerConfig = new QuorumPeerConfig();
-                quorumPeerConfig.parseProperties(properties);
-
-                zkServer = new ZooKeeperServerMain();
-                ServerConfig configuration = new ServerConfig();
-                configuration.readFrom(quorumPeerConfig);
-
-                zkServer.runFromConfig(configuration);
-            }
-            catch (Exception e) {
-                if (errorHandler != null) {
-                    errorHandler.handleError(e);
-                }
-                else {
-//                    logger.error("Exception running embedded ZooKeeper", e);
-                }
-            }
-        }
-    }
-
-}
\ No newline at end of file
diff --git a/internal-service/service-provider/src/main/java/com/aliware/tianchi/HashServiceImpl.java b/internal-service/service-provider/src/main/java/com/aliware/tianchi/HashServiceImpl.java
index 8fc4b895c245c01739fe5111b514da375777bf28..614cee9b04c3bec95d92be0fcaa58c331f49f522 100644
--- a/internal-service/service-provider/src/main/java/com/aliware/tianchi/HashServiceImpl.java
+++ b/internal-service/service-provider/src/main/java/com/aliware/tianchi/HashServiceImpl.java
@@ -2,13 +2,15 @@ package com.aliware.tianchi;
 
 import java.util.Collections;
 import java.util.List;
+import java.util.Random;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
 import java.util.concurrent.Semaphore;
-import java.util.concurrent.ThreadLocalRandom;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import org.apache.dubbo.common.utils.NamedThreadFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Facade
@@ -16,14 +18,18 @@ import org.apache.dubbo.common.utils.NamedThreadFactory;
  * @author guohaoice@gmail.com
  */
 public class HashServiceImpl implements HashInterface {
+  private static final Logger LOGGER = LoggerFactory.getLogger(HashServiceImpl.class);
+
   private final String salt;
   private final AtomicBoolean init = new AtomicBoolean(false);
   private final List<ThrashConfig> configs;
   private volatile ThrashConfig config;
+  private Random rng = new Random(2019);
   private ScheduledExecutorService scheduler =
-      new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("Benchmark-refresh-permit"));
+      new ScheduledThreadPoolExecutor(1, new NamedThreadFactory("HashService-Refresher"));
+
   public HashServiceImpl(String salt) {
-      this(salt,Collections.emptyList());
+    this(salt, Collections.emptyList());
   }
 
   public HashServiceImpl(String salt, List<ThrashConfig> configs) {
@@ -34,6 +40,7 @@ public class HashServiceImpl implements HashInterface {
 
   @Override
   public int hash(String input) {
+    long st = System.currentTimeMillis();
     if (!init.get()) {
       if (init.compareAndSet(false, true)) {
         int startTime = 0;
@@ -53,6 +60,8 @@ public class HashServiceImpl implements HashInterface {
     } catch (InterruptedException e) {
       Thread.currentThread().interrupt();
     } finally {
+      long cost = System.currentTimeMillis() - st;
+      LOGGER.info("HashService cost:{} ms to handle request", cost);
       permit.release();
     }
     throw new IllegalStateException("Unexpected exception");
@@ -63,7 +72,6 @@ public class HashServiceImpl implements HashInterface {
   }
 
   private long nextRTT() {
-    ThreadLocalRandom rng = ThreadLocalRandom.current();
     double u = rng.nextDouble();
     int x = 0;
     double cdf = 0;
diff --git a/internal-service/service-provider/src/main/java/com/aliware/tianchi/ThrashConfig.java b/internal-service/service-provider/src/main/java/com/aliware/tianchi/ThrashConfig.java
index 9aa3ed71e1c7b2aabf6113f5146dfc174c0449f8..cf77000573203f195cbe18d58b5c6639446ba87b 100644
--- a/internal-service/service-provider/src/main/java/com/aliware/tianchi/ThrashConfig.java
+++ b/internal-service/service-provider/src/main/java/com/aliware/tianchi/ThrashConfig.java
@@ -8,13 +8,11 @@ import java.util.concurrent.Semaphore;
 public class ThrashConfig {
     public static final ThrashConfig INIT_CONFIG=new ThrashConfig(4000,Integer.MAX_VALUE,10);
     final long durationInMs;
-    final int maxConcurrency;
     final int averageRTTInMs;
     final Semaphore permit;
 
     public ThrashConfig(long durationInMs, int maxConcurrency, int averageRTTInMs) {
         this.durationInMs = durationInMs;
-        this.maxConcurrency = maxConcurrency;
         this.averageRTTInMs = averageRTTInMs;
         this.permit=new Semaphore(maxConcurrency);
     }
diff --git a/internal-service/service-provider/src/main/java/com/aliware/tianchi/policy/SmallConfig.java b/internal-service/service-provider/src/main/java/com/aliware/tianchi/policy/SmallConfig.java
new file mode 100644
index 0000000000000000000000000000000000000000..30db975a577ca29cdb4f4b89ed163d30db813b1a
--- /dev/null
+++ b/internal-service/service-provider/src/main/java/com/aliware/tianchi/policy/SmallConfig.java
@@ -0,0 +1,25 @@
+package com.aliware.tianchi.policy;
+
+import java.util.Arrays;
+import java.util.List;
+import com.aliware.tianchi.ThrashConfig;
+
+/**
+ * @author guohaoice@gmail.com
+ */
+public class SmallConfig {
+    private final int baseRTT=20;
+    private final int onePeriodInMs=20_000;
+    private final int baseMaxConcurrency=10_000;
+    private final ThrashConfig config1=new ThrashConfig(onePeriodInMs,baseMaxConcurrency,baseRTT/2);
+    private final ThrashConfig config2=new ThrashConfig(onePeriodInMs,baseMaxConcurrency,baseRTT);
+    private final ThrashConfig config3=new ThrashConfig(onePeriodInMs,baseMaxConcurrency/2,baseRTT);
+    private final ThrashConfig config4=new ThrashConfig(onePeriodInMs,baseMaxConcurrency,baseRTT);
+    private final ThrashConfig config5=new ThrashConfig(onePeriodInMs,baseMaxConcurrency/2,baseRTT*2);
+    private final ThrashConfig config6=new ThrashConfig(onePeriodInMs,baseMaxConcurrency*2,baseRTT);
+    private final ThrashConfig config7=new ThrashConfig(onePeriodInMs,baseMaxConcurrency,baseRTT);
+    private final ThrashConfig config8=new ThrashConfig(onePeriodInMs,baseMaxConcurrency*2,baseRTT/2);
+    private final ThrashConfig config9=new ThrashConfig(onePeriodInMs,baseMaxConcurrency,baseRTT);
+
+    public final List<ThrashConfig> allConfig= Arrays.asList(config1,config2,config3,config4,config5,config6,config7,config8,config9);
+}
diff --git a/internal-service/service-provider/src/main/resources/dubbo-provider.xml b/internal-service/service-provider/src/main/resources/dubbo-provider.xml
deleted file mode 100644
index 2acb173345f9463a9f75c5bca1483a3d322c4bd0..0000000000000000000000000000000000000000
--- a/internal-service/service-provider/src/main/resources/dubbo-provider.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
-       xmlns="http://www.springframework.org/schema/beans"
-       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
-       http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">
-
-    <!-- provider's application name, used for tracing dependency relationship -->
-    <dubbo:application name="demo-provider"/>
-    <!-- use multicast registry center to export service -->
-    <dubbo:registry address="zookeeper://127.0.0.1:2181"/>
-    <!-- use dubbo protocol to export service on port 20880 -->
-    <dubbo:protocol name="dubbo" port="20880"/>
-    <!-- service implementation, as same as regular local bean -->
-    <bean id="demoService" class="com.aliware.tianchi.HashServiceImpl">
-<!--        <constructor-arg index="0" value=""/>-->
-<!--        <constructor-arg index="1" value="10000000"/>-->
-        <constructor-arg index="0" value="salt-value"/>
-    </bean>
-    <!-- declare the service interface to be exported -->
-    <dubbo:service interface="com.aliware.tianchi.HashInterface" ref="demoService"/>
-</beans>
\ No newline at end of file
diff --git a/internal-service/service-provider/src/main/resources/logback.xml b/internal-service/service-provider/src/main/resources/logback.xml
new file mode 100644
index 0000000000000000000000000000000000000000..946213798813423e6339cc6a3e5616c78ac9e975
--- /dev/null
+++ b/internal-service/service-provider/src/main/resources/logback.xml
@@ -0,0 +1,22 @@
+<configuration>
+    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+        <file>service-provider.log</file>
+        <encoder>
+            <pattern>%date %level [%thread] %logger{10} [%file : %line] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="chapters.configuration.Foo" additivity="false">
+        <appender-ref ref="FILE" />
+    </logger>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index f3e4412702e5d142ef4b7ca85c5fbe52487a08b6..f3753cfd88a8d48cea44d843248c9a693fe5e90d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -61,9 +61,14 @@
             <!--internal end-->
 
             <dependency>
-                <groupId>org.springframework</groupId>
-                <artifactId>spring-context</artifactId>
-                <version>4.3.23.RELEASE</version>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-api</artifactId>
+                <version>1.7.26</version>
+            </dependency>
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-classic</artifactId>
+                <version>1.2.3</version>
             </dependency>
         </dependencies>
     </dependencyManagement>