# 集群测试

    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.net.URI;

    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.fs.FileSystem;
    import org.apache.hadoop.fs.Path;
    import org.apache.hadoop.io.IOUtils;

    public class NameService_Load {

      public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        Configuration configuration=new Configuration();
        configuration.set("dfs.nameservices","ns1");
        configuration.set("dfs.ha.namenodes.ns1", "nn1,nn2");
        configuration.set("dfs.namenode.rpc-address.ns1.nn1", "hadoop01:9000");
        configuration.set("dfs.namenode.rpc-address.ns1.nn2", "hadoop02:9000");
        configuration.set("dfs.client.failover.proxy.provider.ns1", 
                        "org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider");
        FileSystem fs =FileSystem.get(new URI("hdfs://ns1"), configuration);
        InputStream in=fs.open(new Path("/words"));
        OutputStream out=new FileOutputStream(new File("f://asd.txt"));
        IOUtils.copyBytes(in, out, 4096, true);
      }

    }