Netty高性能大容量Socket并发(一):Netty性能测试

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Netty性能测试

Netty是由JBOSS提供的一个java开源框架。Netty提供异步的、事件驱动的网络应用程序框架和工具,用以快速开发高性能、高可靠性的网络服务器和客户端程序。Netty 是一个基于NIO的客户,服务器端编程框架,使用Netty 可以确保你快速和简单的开发出一个网络应用,例如实现了某种协议的客户,服务端应用。Netty相当简化和流线化了网络应用的编程开发过程,例如,TCP和UDP的socket服务开发。

Netty简化socket编程,并没有使写出来的Socket效率变低,我写了一个所有都使用默认配置的服务端,模拟最常用的RPC方案,传输协议使用4字节长度加json串的方式来传输,测试服务端的通讯效率,测试结果如下。


从测试结果看,Netty性能是非常高的,在所有使用默认配置的情况下,单台服务器能够达到4万次请求解析,作为RPC框架是足够用的。还有一个有趣的现象是每次都创建连接和重用连接的差别不大,性能损耗对应用层几乎没影响,但是大家如果在应用环境中使用每次新建的情况,一定要进行压测,确认没影响后再使用。

测试用例说明

  1. 部署1台Netty服务器,部署8台并发测试客户端,每个客户端跑1024个并发;
  2. 分为1次连接请求1000次数据和1次连接请求1次数据循环1000次;
  3. Netty服务器为Cent OS 6.5 64位,阿里云8核16G内存,JVM使用默认配置,没有进行任何调优;
  4. 并发客户端为Windows Server 2008 R2  64位企业版,阿里云8核16G内存,NET Framework 4.5运行环境,没有进行任何调优;
  5. 通讯数据格式为:4字节长度+JSON串,服务器负责接收JSON串,进行解析和返回;

Netty服务端代码

主程序入口
public class AppNettyServer {    public static void main(String[] args) throws Exception {        System.out.print("Hello Netty\r\n");        int port = 9090;        if (args != null && args.length > 0) {            try {                port = Integer.valueOf(args[0]);            } catch (NumberFormatException e) {                System.out.print("Invalid Port, Start Default Port: 9090");            }        }        try {            NettyCommandServer commandServer = new NettyCommandServer();            System.out.print("Start listen socket, port " + port + "\r\n");            commandServer.bind(port);        } catch (Exception e) {            System.out.print(e.getMessage());        }    }}
Netty服务端初始化
public class NettyCommandServer {    public static InternalLogger logger = InternalLoggerFactory.getInstance(NettyCommandServer.class);    public void bind(int port) throws Exception {        EventLoopGroup bossGroup = new NioEventLoopGroup();        EventLoopGroup workerGroup = new NioEventLoopGroup();        try {            ServerBootstrap serverBootstrap = new ServerBootstrap();            serverBootstrap.group(bossGroup, workerGroup);            serverBootstrap.channel(NioServerSocketChannel.class);            serverBootstrap.option(ChannelOption.SO_BACKLOG, 1024);            serverBootstrap.handler(new LoggingHandler());            serverBootstrap.childHandler(new NettyChannelHandler());            ChannelFuture channelFuture = serverBootstrap.bind(port).sync();            channelFuture.channel().closeFuture().sync();        } finally {            bossGroup.shutdownGracefully();            workerGroup.shutdownGracefully();        }    }    private class NettyChannelHandler extends ChannelInitializer<SocketChannel> {        @Override        protected void initChannel(SocketChannel socketChannel)                throws Exception {            socketChannel.pipeline().addLast(new LengthFieldBasedFrameDecoder(ByteOrder.BIG_ENDIAN, 64 * 1024, 0, 4, 0, 4, true));            socketChannel.pipeline().addLast(new StringDecoder(Charset.forName("UTF-8")));            socketChannel.pipeline().addLast(new NettyCommandHandler());        }    }}
通讯协议解析数据
public class NettyCommandHandler extends ChannelHandlerAdapter {    private int counter = 0;    @Override    public void channelRead(ChannelHandlerContext ctx, Object msg) {        try {            String body = (String) msg;            JsonDataObject request = JsonUtil.fromJson(body, JsonDataObject.class);            counter = counter + 1;            JsonDataObject response = new JsonDataObject();            response.setCode(0);            response.setMsg("Success");            response.setData(counter+"");            String respJson = JsonUtil.toJson(response);            byte[] respUtf8 = respJson.getBytes("UTF-8");            int respLength = respUtf8.length;            ByteBuf respLengthBuf = PooledByteBufAllocator.DEFAULT.buffer(4);            respLengthBuf.writeInt(respLength);            respLengthBuf.order(ByteOrder.BIG_ENDIAN);            ctx.write(respLengthBuf);            ByteBuf resp = PooledByteBufAllocator.DEFAULT.buffer(respUtf8.length);            resp.writeBytes(respUtf8);            ctx.write(resp);        } catch (Exception e) {            NettyCommandServer.logger.error(e.getMessage() + "\r\n");            StringWriter sw = new StringWriter();            PrintWriter pw = new PrintWriter(sw);            e.printStackTrace(pw);            pw.flush();            sw.flush();            NettyCommandServer.logger.error(sw.toString());        }    }    @Override    public void channelReadComplete(ChannelHandlerContext ctx) {        ctx.flush();    }    @Override    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {        ctx.close();    }}
C#客户端代码
    public class SocketClient : Object    {        private TcpClient tcpClient;        public SocketClient()        {            tcpClient = new TcpClient();            tcpClient.Client.Blocking = true;        }        public void Connect(string host, int port)        {            tcpClient.Connect(host, port);        }        public void Disconnect()        {            tcpClient.Close();        }        public string SendJson(string json)        {            byte[] bufferUTF8 = Encoding.UTF8.GetBytes(json);            int jsonLength = System.Net.IPAddress.HostToNetworkOrder(bufferUTF8.Length); //转换为网络字节顺序,大头结构            byte[] bufferLength = BitConverter.GetBytes(jsonLength);            tcpClient.Client.Send(bufferLength, 0, bufferLength.Length, SocketFlags.None); //发送4字节长度            tcpClient.Client.Send(bufferUTF8, 0, bufferUTF8.Length, SocketFlags.None); //发送Json串内容            byte[] bufferRecvLength = new byte[sizeof(int)];            tcpClient.Client.Receive(bufferRecvLength, sizeof(int), SocketFlags.None); //获取长度            int recvLength = BitConverter.ToInt32(bufferRecvLength, 0);            recvLength = System.Net.IPAddress.NetworkToHostOrder(recvLength); //转为本地字节顺序            byte[] bufferRecvUtf8 = new byte[recvLength];            tcpClient.Client.Receive(bufferRecvUtf8, recvLength, SocketFlags.None);            string recvCommand = Encoding.UTF8.GetString(bufferRecvUtf8, 0, recvLength);            return recvCommand;        }    }

测试DEMO下载地址:下载地址


免责声明:此代码只是为了演示Netty性能测试,仅用于学习和研究,切勿用于商业用途。水平有限,错误在所难免,欢迎指正和指导。邮箱地址:fansheng_hx@163.com


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