Beispiel #1
0
  private static void finalize(
      Configuration conf, JobConf jobconf, final Path destPath, String presevedAttributes)
      throws IOException {
    if (presevedAttributes == null) {
      return;
    }
    EnumSet<FileAttribute> preseved = FileAttribute.parse(presevedAttributes);
    if (!preseved.contains(FileAttribute.USER)
        && !preseved.contains(FileAttribute.GROUP)
        && !preseved.contains(FileAttribute.PERMISSION)) {
      return;
    }

    FileSystem dstfs = destPath.getFileSystem(conf);
    Path dstdirlist = new Path(jobconf.get(DST_DIR_LIST_LABEL));
    SequenceFile.Reader in = null;
    try {
      in = new SequenceFile.Reader(dstdirlist.getFileSystem(jobconf), dstdirlist, jobconf);
      Text dsttext = new Text();
      FilePair pair = new FilePair();
      for (; in.next(dsttext, pair); ) {
        Path absdst = new Path(destPath, pair.output);
        updatePermissions(pair.input, dstfs.getFileStatus(absdst), preseved, dstfs);
      }
    } finally {
      checkAndClose(in);
    }
  }
Beispiel #2
0
  /** Check whether the file list have duplication. */
  private static void checkDuplication(FileSystem fs, Path file, Path sorted, Configuration conf)
      throws IOException {
    SequenceFile.Reader in = null;
    try {
      SequenceFile.Sorter sorter =
          new SequenceFile.Sorter(fs, new Text.Comparator(), Text.class, Text.class, conf);
      sorter.sort(file, sorted);
      in = new SequenceFile.Reader(fs, sorted, conf);

      Text prevdst = null, curdst = new Text();
      Text prevsrc = null, cursrc = new Text();
      for (; in.next(curdst, cursrc); ) {
        if (prevdst != null && curdst.equals(prevdst)) {
          throw new DuplicationException(
              "Invalid input, there are duplicated files in the sources: "
                  + prevsrc
                  + ", "
                  + cursrc);
        }
        prevdst = curdst;
        curdst = new Text();
        prevsrc = cursrc;
        cursrc = new Text();
      }
    } finally {
      checkAndClose(in);
    }
  }
  public void configure(JobConf conf) {
    numberOfCenters = Integer.valueOf(conf.get("numberOfCenters"));
    centersDirectory = conf.get("centersReadDirectory");

    try {
      Configuration c = new Configuration();
      FileSystem fs = FileSystem.get(c);

      for (int index = 0; index < numberOfCenters; ++index) {
        SequenceFile.Reader reader =
            new SequenceFile.Reader(fs, new Path(centersDirectory + "/centers/" + index), c);

        LongWritable key = new LongWritable();
        Point value = new Point();

        reader.next(key, value);

        Point center = (Point) value;

        centers.add(center);

        reader.close();
      }
    } catch (IOException e) {
      // do nothing
      // I hope this doesn't happen
      System.out.println("well, damn.");
      e.printStackTrace();
    }
  }
Beispiel #4
0
    /**
     * Produce splits such that each is no greater than the quotient of the total size and the
     * number of splits requested.
     *
     * @param job The handle to the JobConf object
     * @param numSplits Number of splits requested
     */
    public InputSplit[] getSplits(JobConf job, int numSplits) throws IOException {
      int cnfiles = job.getInt(SRC_COUNT_LABEL, -1);
      long cbsize = job.getLong(TOTAL_SIZE_LABEL, -1);
      String srcfilelist = job.get(SRC_LIST_LABEL, "");
      if (cnfiles < 0 || cbsize < 0 || "".equals(srcfilelist)) {
        throw new RuntimeException(
            "Invalid metadata: #files("
                + cnfiles
                + ") total_size("
                + cbsize
                + ") listuri("
                + srcfilelist
                + ")");
      }
      Path src = new Path(srcfilelist);
      FileSystem fs = src.getFileSystem(job);
      FileStatus srcst = fs.getFileStatus(src);

      ArrayList<FileSplit> splits = new ArrayList<FileSplit>(numSplits);
      LongWritable key = new LongWritable();
      FilePair value = new FilePair();
      final long targetsize = cbsize / numSplits;
      long pos = 0L;
      long last = 0L;
      long acc = 0L;
      long cbrem = srcst.getLen();
      SequenceFile.Reader sl = null;
      try {
        sl = new SequenceFile.Reader(fs, src, job);
        for (; sl.next(key, value); last = sl.getPosition()) {
          // if adding this split would put this split past the target size,
          // cut the last split and put this next file in the next split.
          if (acc + key.get() > targetsize && acc != 0) {
            long splitsize = last - pos;
            splits.add(new FileSplit(src, pos, splitsize, (String[]) null));
            cbrem -= splitsize;
            pos = last;
            acc = 0L;
          }
          acc += key.get();
        }
      } finally {
        checkAndClose(sl);
      }
      if (cbrem != 0) {
        splits.add(new FileSplit(src, pos, cbrem, (String[]) null));
      }

      return splits.toArray(new FileSplit[splits.size()]);
    }
Beispiel #5
0
  /** Delete the dst files/dirs which do not exist in src */
  private static void deleteNonexisting(
      FileSystem dstfs,
      FileStatus dstroot,
      Path dstsorted,
      FileSystem jobfs,
      Path jobdir,
      JobConf jobconf,
      Configuration conf)
      throws IOException {
    if (!dstroot.isDir()) {
      throw new IOException(
          "dst must be a directory when option "
              + Options.DELETE.cmd
              + " is set, but dst (= "
              + dstroot.getPath()
              + ") is not a directory.");
    }

    // write dst lsr results
    final Path dstlsr = new Path(jobdir, "_distcp_dst_lsr");
    final SequenceFile.Writer writer =
        SequenceFile.createWriter(
            jobfs,
            jobconf,
            dstlsr,
            Text.class,
            FileStatus.class,
            SequenceFile.CompressionType.NONE);
    try {
      // do lsr to get all file statuses in dstroot
      final Stack<FileStatus> lsrstack = new Stack<FileStatus>();
      for (lsrstack.push(dstroot); !lsrstack.isEmpty(); ) {
        final FileStatus status = lsrstack.pop();
        if (status.isDir()) {
          for (FileStatus child : dstfs.listStatus(status.getPath())) {
            String relative = makeRelative(dstroot.getPath(), child.getPath());
            writer.append(new Text(relative), child);
            lsrstack.push(child);
          }
        }
      }
    } finally {
      checkAndClose(writer);
    }

    // sort lsr results
    final Path sortedlsr = new Path(jobdir, "_distcp_dst_lsr_sorted");
    SequenceFile.Sorter sorter =
        new SequenceFile.Sorter(
            jobfs, new Text.Comparator(), Text.class, FileStatus.class, jobconf);
    sorter.sort(dstlsr, sortedlsr);

    // compare lsr list and dst list
    SequenceFile.Reader lsrin = null;
    SequenceFile.Reader dstin = null;
    try {
      lsrin = new SequenceFile.Reader(jobfs, sortedlsr, jobconf);
      dstin = new SequenceFile.Reader(jobfs, dstsorted, jobconf);

      // compare sorted lsr list and sorted dst list
      final Text lsrpath = new Text();
      final FileStatus lsrstatus = new FileStatus();
      final Text dstpath = new Text();
      final Text dstfrom = new Text();
      final FsShell shell = new FsShell(conf);
      final String[] shellargs = {"-rmr", null};

      boolean hasnext = dstin.next(dstpath, dstfrom);
      for (; lsrin.next(lsrpath, lsrstatus); ) {
        int dst_cmp_lsr = dstpath.compareTo(lsrpath);
        for (; hasnext && dst_cmp_lsr < 0; ) {
          hasnext = dstin.next(dstpath, dstfrom);
          dst_cmp_lsr = dstpath.compareTo(lsrpath);
        }

        if (dst_cmp_lsr == 0) {
          // lsrpath exists in dst, skip it
          hasnext = dstin.next(dstpath, dstfrom);
        } else {
          // lsrpath does not exist, delete it
          String s = new Path(dstroot.getPath(), lsrpath.toString()).toString();
          if (shellargs[1] == null || !isAncestorPath(shellargs[1], s)) {
            shellargs[1] = s;
            int r = 0;
            try {
              r = shell.run(shellargs);
            } catch (Exception e) {
              throw new IOException("Exception from shell.", e);
            }
            if (r != 0) {
              throw new IOException(
                  "\"" + shellargs[0] + " " + shellargs[1] + "\" returns non-zero value " + r);
            }
          }
        }
      }
    } finally {
      checkAndClose(lsrin);
      checkAndClose(dstin);
    }
  }