Package org.apache.hadoop.tools

Examples of org.apache.hadoop.tools.DistCpV1

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      cluster = new MiniDFSCluster(conf, 1, true, null);
      final FileSystem hdfs = cluster.getFileSystem();
      final String namenode = hdfs.getUri().toString();
      if (namenode.startsWith("hdfs://")) {
        MyFile[] files = createFiles(LOCAL_FS, TEST_ROOT_DIR+"/srcdat");
        ToolRunner.run(new DistCpV1(conf), new String[] {
                                         "-log",
                                         namenode+"/logs",
                                         "file:///"+TEST_ROOT_DIR+"/srcdat",
                                         namenode+"/destdat"});
        assertTrue("Source and destination directories do not match.",
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      cluster = new MiniDFSCluster(conf, 1, true, null);
      final FileSystem hdfs = cluster.getFileSystem();
      final String namenode = FileSystem.getDefaultUri(conf).toString();
      if (namenode.startsWith("hdfs://")) {
        MyFile[] files = createFiles(URI.create(namenode), "/srcdat");
        ToolRunner.run(new DistCpV1(conf), new String[] {
                                         "-log",
                                         "/logs",
                                         namenode+"/srcdat",
                                         "file:///"+TEST_ROOT_DIR+"/destdat"});
        assertTrue("Source and destination directories do not match.",
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      cluster = new MiniDFSCluster(conf, 2, true, null);
      final FileSystem hdfs = cluster.getFileSystem();
      final String namenode = hdfs.getUri().toString();
      if (namenode.startsWith("hdfs://")) {
        MyFile[] files = createFiles(URI.create(namenode), "/srcdat");
        ToolRunner.run(new DistCpV1(conf), new String[] {
                                         "-p",
                                         "-log",
                                         namenode+"/logs",
                                         namenode+"/srcdat",
                                         namenode+"/destdat"});
        assertTrue("Source and destination directories do not match.",
                   checkFiles(hdfs, "/destdat", files));
        FileSystem fs = FileSystem.get(URI.create(namenode+"/logs"), conf);
        assertTrue("Log directory does not exist.",
                    fs.exists(new Path(namenode+"/logs")));

        FileStatus[] dchkpoint = getFileStatus(hdfs, "/destdat", files);
        final int nupdate = NFILES>>2;
        updateFiles(cluster.getFileSystem(), "/srcdat", files, nupdate);
        deldir(hdfs, "/logs");

        ToolRunner.run(new DistCpV1(conf), new String[] {
                                         "-prbugp", // no t to avoid preserving mod. times
                                         "-update",
                                         "-log",
                                         namenode+"/logs",
                                         namenode+"/srcdat",
                                         namenode+"/destdat"});
        assertTrue("Source and destination directories do not match.",
                   checkFiles(hdfs, "/destdat", files));
        assertTrue("Update failed to replicate all changes in src",
                 checkUpdate(hdfs, dchkpoint, "/destdat", files, nupdate));

        deldir(hdfs, "/logs");
        ToolRunner.run(new DistCpV1(conf), new String[] {
                                         "-prbugp", // no t to avoid preserving mod. times
                                         "-overwrite",
                                         "-log",
                                         namenode+"/logs",
                                         namenode+"/srcdat",
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        out = fs.create(destPath, true);
        out.writeUTF(destData);
        out.close();
       
        // Run with -skipcrccheck option
        ToolRunner.run(new DistCpV1(conf), new String[] {
          "-p",
          "-update",
          "-skipcrccheck",
          "-log",
          namenode+"/logs",
          namenode+"/srcdat",
          namenode+"/destdat"});
       
        // File should not be overwritten
        FSDataInputStream in = hdfs.open(destPath);
        String s = in.readUTF();
        System.out.println("Dest had: " + s);
        assertTrue("Dest got over written even with skip crc",
            s.equalsIgnoreCase(destData));
        in.close();
       
        deldir(hdfs, "/logs");

        // Run without the option       
        ToolRunner.run(new DistCpV1(conf), new String[] {
          "-p",
          "-update",
          "-log",
          namenode+"/logs",
          namenode+"/srcdat",
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  public void testCopyDuplication() throws Exception {
    final FileSystem localfs = FileSystem.get(LOCAL_FS, new Configuration());
    try {   
      MyFile[] files = createFiles(localfs, TEST_ROOT_DIR+"/srcdat");
      ToolRunner.run(new DistCpV1(new Configuration()),
          new String[] {"file:///"+TEST_ROOT_DIR+"/srcdat",
                        "file:///"+TEST_ROOT_DIR+"/src2/srcdat"});
      assertTrue("Source and destination directories do not match.",
                 checkFiles(localfs, TEST_ROOT_DIR+"/src2/srcdat", files));
 
      assertEquals(DistCpV1.DuplicationException.ERROR_CODE,
          ToolRunner.run(new DistCpV1(new Configuration()),
          new String[] {"file:///"+TEST_ROOT_DIR+"/srcdat",
                        "file:///"+TEST_ROOT_DIR+"/src2/srcdat",
                        "file:///"+TEST_ROOT_DIR+"/destdat",}));
    }
    finally {
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    FileSystem fs = FileSystem.get(LOCAL_FS, new Configuration());
    Path root = new Path(TEST_ROOT_DIR+"/srcdat");
    try {   
      MyFile[] files = {createFile(root, fs)};
      //copy a dir with a single file
      ToolRunner.run(new DistCpV1(new Configuration()),
          new String[] {"file:///"+TEST_ROOT_DIR+"/srcdat",
                        "file:///"+TEST_ROOT_DIR+"/destdat"});
      assertTrue("Source and destination directories do not match.",
                 checkFiles(fs, TEST_ROOT_DIR+"/destdat", files));
     
      //copy a single file
      String fname = files[0].getName();
      Path p = new Path(root, fname);
      FileSystem.LOG.info("fname=" + fname + ", exists? " + fs.exists(p));
      ToolRunner.run(new DistCpV1(new Configuration()),
          new String[] {"file:///"+TEST_ROOT_DIR+"/srcdat/"+fname,
                        "file:///"+TEST_ROOT_DIR+"/dest2/"+fname});
      assertTrue("Source and destination directories do not match.",
          checkFiles(fs, TEST_ROOT_DIR+"/dest2", files));    
     
      // single file update should skip copy if destination has the file already
      String[] args = {"-update", "file:///"+TEST_ROOT_DIR+"/srcdat/"+fname,
          "file:///"+TEST_ROOT_DIR+"/dest2/"+fname};
      Configuration conf = new Configuration();
      JobConf job = new JobConf(conf, DistCpV1.class);
      DistCpV1.Arguments distcpArgs = DistCpV1.Arguments.valueOf(args, conf);
      assertFalse("Single file update failed to skip copying even though the "
          + "file exists at destination.", DistCpV1.setup(conf, job, distcpArgs));
     
      //copy single file to existing dir
      deldir(fs, TEST_ROOT_DIR+"/dest2");
      fs.mkdirs(new Path(TEST_ROOT_DIR+"/dest2"));
      MyFile[] files2 = {createFile(root, fs, 0)};
      String sname = files2[0].getName();
      ToolRunner.run(new DistCpV1(new Configuration()),
          new String[] {"-update",
                        "file:///"+TEST_ROOT_DIR+"/srcdat/"+sname,
                        "file:///"+TEST_ROOT_DIR+"/dest2/"});
      assertTrue("Source and destination directories do not match.",
          checkFiles(fs, TEST_ROOT_DIR+"/dest2", files2));    
      updateFiles(fs, TEST_ROOT_DIR+"/srcdat", files2, 1);
      //copy single file to existing dir w/ dst name conflict
      ToolRunner.run(new DistCpV1(new Configuration()),
          new String[] {"-update",
                        "file:///"+TEST_ROOT_DIR+"/srcdat/"+sname,
                        "file:///"+TEST_ROOT_DIR+"/dest2/"});
      assertTrue("Source and destination directories do not match.",
          checkFiles(fs, TEST_ROOT_DIR+"/dest2", files2));    
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      cluster = new MiniDFSCluster(conf, 2, true, null);
      final FileSystem hdfs = cluster.getFileSystem();
      namenode = FileSystem.getDefaultUri(conf).toString();
      if (namenode.startsWith("hdfs://")) {
        MyFile[] files = createFiles(URI.create(namenode), "/basedir/middle/srcdat");
        ToolRunner.run(new DistCpV1(conf), new String[] {
                                         "-basedir",
                                         "/basedir",
                                         namenode+"/basedir/middle/srcdat",
                                         namenode+"/destdat"});
        assertTrue("Source and destination directories do not match.",
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        MyFile[] files = createFiles(URI.create(nnUri), "/srcdat");
        FileStatus[] srcstat = getFileStatus(fs, "/srcdat", files);
        for(int i = 0; i < srcstat.length; i++) {
          fs.setOwner(srcstat[i].getPath(), "u" + i, null);
        }
        ToolRunner.run(new DistCpV1(conf),
            new String[]{"-pu", nnUri+"/srcdat", nnUri+"/destdat"});
        assertTrue("Source and destination directories do not match.",
                   checkFiles(fs, "/destdat", files));
       
        FileStatus[] dststat = getFileStatus(fs, "/destdat", files);
        for(int i = 0; i < dststat.length; i++) {
          assertEquals("i=" + i, "u" + i, dststat[i].getOwner());
        }
        deldir(fs, "/destdat");
        deldir(fs, "/srcdat");
      }

      {//test preserving group
        MyFile[] files = createFiles(URI.create(nnUri), "/srcdat");
        FileStatus[] srcstat = getFileStatus(fs, "/srcdat", files);
        for(int i = 0; i < srcstat.length; i++) {
          fs.setOwner(srcstat[i].getPath(), null, "g" + i);
        }
        ToolRunner.run(new DistCpV1(conf),
            new String[]{"-pg", nnUri+"/srcdat", nnUri+"/destdat"});
        assertTrue("Source and destination directories do not match.",
                   checkFiles(fs, "/destdat", files));
       
        FileStatus[] dststat = getFileStatus(fs, "/destdat", files);
        for(int i = 0; i < dststat.length; i++) {
          assertEquals("i=" + i, "g" + i, dststat[i].getGroup());
        }
        deldir(fs, "/destdat");
        deldir(fs, "/srcdat");
      }

      {//test preserving mode
        MyFile[] files = createFiles(URI.create(nnUri), "/srcdat");
        FileStatus[] srcstat = getFileStatus(fs, "/srcdat", files);
        FsPermission[] permissions = new FsPermission[srcstat.length];
        for(int i = 0; i < srcstat.length; i++) {
          permissions[i] = new FsPermission((short)(i & 0666));
          fs.setPermission(srcstat[i].getPath(), permissions[i]);
        }

        ToolRunner.run(new DistCpV1(conf),
            new String[]{"-pp", nnUri+"/srcdat", nnUri+"/destdat"});
        assertTrue("Source and destination directories do not match.",
                   checkFiles(fs, "/destdat", files));
 
        FileStatus[] dststat = getFileStatus(fs, "/destdat", files);
        for(int i = 0; i < dststat.length; i++) {
          assertEquals("i=" + i, permissions[i], dststat[i].getPermission());
        }
        deldir(fs, "/destdat");
        deldir(fs, "/srcdat");
      }

      {//test preserving times
        MyFile[] files = createFiles(URI.create(nnUri), "/srcdat");
        fs.mkdirs(new Path("/srcdat/tmpf1"));
        fs.mkdirs(new Path("/srcdat/tmpf2"));
        FileStatus[] srcstat = getFileStatus(fs, "/srcdat", files);
        FsPermission[] permissions = new FsPermission[srcstat.length];
        for(int i = 0; i < srcstat.length; i++) {
          fs.setTimes(srcstat[i].getPath(), 40, 50);
        }

        ToolRunner.run(new DistCpV1(conf),
            new String[]{"-pt", nnUri+"/srcdat", nnUri+"/destdat"});

        FileStatus[] dststat = getFileStatus(fs, "/destdat", files);
        for(int i = 0; i < dststat.length; i++) {
          assertEquals("Modif. Time i=" + i, 40, dststat[i].getModificationTime());
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      for (MyFile f : files) {
        totsize += f.getSize();
      }
      Configuration job = mr.createJobConf();
      job.setLong("distcp.bytes.per.map", totsize / 3);
      ToolRunner.run(new DistCpV1(job),
          new String[] {"-m", "100",
                        "-log",
                        namenode+"/logs",
                        namenode+"/srcdat",
                        namenode+"/destdat"});
      assertTrue("Source and destination directories do not match.",
                 checkFiles(fs, "/destdat", files));

      String logdir = namenode + "/logs";
      System.out.println(execCmd(shell, "-lsr", logdir));
      FileStatus[] logs = fs.listStatus(new Path(logdir));
      // rare case where splits are exact, logs.length can be 4
      assertTrue("Unexpected map count, logs.length=" + logs.length,
          logs.length == 5 || logs.length == 4);

      deldir(fs, "/destdat");
      deldir(fs, "/logs");
      ToolRunner.run(new DistCpV1(job),
          new String[] {"-m", "1",
                        "-log",
                        namenode+"/logs",
                        namenode+"/srcdat",
                        namenode+"/destdat"});
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    MiniDFSCluster cluster = null;
    try {
      cluster = new MiniDFSCluster(conf, 2, true, null);
      final String nnUri = FileSystem.getDefaultUri(conf).toString();
      final FileSystem fs = FileSystem.get(URI.create(nnUri), conf);
      final DistCpV1 distcp = new DistCpV1(conf);
      final FsShell shell = new FsShell(conf); 

      final String srcrootdir =  "/src_root";
      final Path srcrootpath = new Path(srcrootdir);
      final String dstrootdir =  "/dst_root";
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Related Classes of org.apache.hadoop.tools.DistCpV1

  • org.apache.hadoop.fs.FileChecksum
  • org.apache.hadoop.fs.FileStatus
  • org.apache.hadoop.fs.FileSystem
  • org.apache.hadoop.fs.FSDataInputStream
  • org.apache.hadoop.fs.FSDataOutputStream
  • org.apache.hadoop.fs.Path
  • org.apache.hadoop.fs.permission.FsPermission
  • org.apache.hadoop.fs.Trash
  • org.apache.hadoop.io.LongWritable
  • org.apache.hadoop.io.Text
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