Examples with FileChunk org.apache.hadoop.io.FileChunk used on opensource projects

Example 6 with FileChunk

use of org.apache.hadoop.io.FileChunk in project tez by apache.

the class TestMergeManager method testOnDiskMergerFilenames.

@Test(timeout = 10000)
public void testOnDiskMergerFilenames() throws IOException, InterruptedException {
    Configuration conf = new TezConfiguration(defaultConf);
    conf.setBoolean(TezRuntimeConfiguration.TEZ_RUNTIME_COMPRESS, false);
    conf.set(TezRuntimeConfiguration.TEZ_RUNTIME_KEY_CLASS, IntWritable.class.getName());
    conf.set(TezRuntimeConfiguration.TEZ_RUNTIME_VALUE_CLASS, IntWritable.class.getName());
    Path localDir = new Path(workDir, "local");
    Path srcDir = new Path(workDir, "srcData");
    localFs.mkdirs(localDir);
    localFs.mkdirs(srcDir);
    conf.setStrings(TezRuntimeFrameworkConfigs.LOCAL_DIRS, localDir.toString());
    FileSystem localFs = FileSystem.getLocal(conf);
    LocalDirAllocator localDirAllocator = new LocalDirAllocator(TezRuntimeFrameworkConfigs.LOCAL_DIRS);
    InputContext inputContext = createMockInputContext(UUID.randomUUID().toString());
    ExceptionReporter exceptionReporter = mock(ExceptionReporter.class);
    MergeManager mergeManagerReal = new MergeManager(conf, localFs, localDirAllocator, inputContext, null, null, null, null, exceptionReporter, 1 * 1024l * 1024l, null, false, -1);
    MergeManager mergeManager = spy(mergeManagerReal);
    // Partition 0 Keys 0-2, Partition 1 Keys 3-5
    SrcFileInfo file1Info = createFile(conf, localFs, new Path(srcDir, InputAttemptIdentifier.PATH_PREFIX + "src1.out"), 2, 3, 6);
    SrcFileInfo file2Info = createFile(conf, localFs, new Path(srcDir, InputAttemptIdentifier.PATH_PREFIX + "src2.out"), 2, 3, 0);
    InputAttemptIdentifier iIdentifier1 = new InputAttemptIdentifier(0, 0, file1Info.path.getName());
    InputAttemptIdentifier iIdentifier2 = new InputAttemptIdentifier(1, 0, file2Info.path.getName());
    MapOutput mapOutput1 = getMapOutputForDirectDiskFetch(iIdentifier1, file1Info.path, file1Info.indexedRecords[0], mergeManager);
    MapOutput mapOutput2 = getMapOutputForDirectDiskFetch(iIdentifier2, file2Info.path, file2Info.indexedRecords[0], mergeManager);
    mapOutput1.commit();
    mapOutput2.commit();
    verify(mergeManager).closeOnDiskFile(mapOutput1.getOutputPath());
    verify(mergeManager).closeOnDiskFile(mapOutput2.getOutputPath());
    List<FileChunk> mergeFiles = new LinkedList<FileChunk>();
    mergeFiles.addAll(mergeManager.onDiskMapOutputs);
    mergeManager.onDiskMapOutputs.clear();
    mergeManager.onDiskMerger.merge(mergeFiles);
    Assert.assertEquals(1, mergeManager.onDiskMapOutputs.size());
    FileChunk fcMerged1 = mergeManager.onDiskMapOutputs.iterator().next();
    Path m1Path = fcMerged1.getPath();
    assertTrue(m1Path.toString().endsWith("merged0"));
    // Add another file. Make sure the filename is different, and does not get clobbered.
    SrcFileInfo file3Info = createFile(conf, localFs, new Path(srcDir, InputAttemptIdentifier.PATH_PREFIX + "src3.out"), 2, 22, 5);
    InputAttemptIdentifier iIdentifier3 = new InputAttemptIdentifier(2, 0, file1Info.path.getName());
    MapOutput mapOutput3 = getMapOutputForDirectDiskFetch(iIdentifier3, file3Info.path, file3Info.indexedRecords[0], mergeManager);
    mapOutput3.commit();
    verify(mergeManager).closeOnDiskFile(mapOutput3.getOutputPath());
    mergeFiles = new LinkedList<FileChunk>();
    mergeFiles.addAll(mergeManager.onDiskMapOutputs);
    mergeManager.onDiskMapOutputs.clear();
    mergeManager.onDiskMerger.merge(mergeFiles);
    Assert.assertEquals(1, mergeManager.onDiskMapOutputs.size());
    FileChunk fcMerged2 = mergeManager.onDiskMapOutputs.iterator().next();
    Path m2Path = fcMerged2.getPath();
    assertTrue(m2Path.toString().endsWith("merged1"));
    assertNotEquals(m1Path, m2Path);
    // Add another file. This time add it to the head of the list.
    SrcFileInfo file4Info = createFile(conf, localFs, new Path(srcDir, InputAttemptIdentifier.PATH_PREFIX + "src4.out"), 2, 45, 35);
    InputAttemptIdentifier iIdentifier4 = new InputAttemptIdentifier(3, 0, file4Info.path.getName());
    MapOutput mapOutput4 = getMapOutputForDirectDiskFetch(iIdentifier4, file4Info.path, file4Info.indexedRecords[0], mergeManager);
    mapOutput4.commit();
    verify(mergeManager).closeOnDiskFile(mapOutput4.getOutputPath());
    // Add in reverse order this time.
    List<FileChunk> tmpList = new LinkedList<>();
    mergeFiles = new LinkedList<>();
    assertEquals(2, mergeManager.onDiskMapOutputs.size());
    tmpList.addAll(mergeManager.onDiskMapOutputs);
    mergeFiles.add(tmpList.get(1));
    mergeFiles.add(tmpList.get(0));
    mergeManager.onDiskMapOutputs.clear();
    mergeManager.onDiskMerger.merge(mergeFiles);
    Assert.assertEquals(1, mergeManager.onDiskMapOutputs.size());
    FileChunk fcMerged3 = mergeManager.onDiskMapOutputs.iterator().next();
    Path m3Path = fcMerged3.getPath();
    assertTrue(m3Path.toString().endsWith("merged2"));
    assertNotEquals(m2Path, m3Path);
    // Ensure the lengths are the same - since the source file names are the same. No append happening.
    assertEquals(m1Path.toString().length(), m2Path.toString().length());
    assertEquals(m2Path.toString().length(), m3Path.toString().length());
    // Ensure the filenames are used correctly - based on the first file given to the merger.
    String m1Prefix = m1Path.toString().substring(0, m1Path.toString().indexOf("."));
    String m2Prefix = m2Path.toString().substring(0, m2Path.toString().indexOf("."));
    String m3Prefix = m3Path.toString().substring(0, m3Path.toString().indexOf("."));
    assertEquals(m1Prefix, m2Prefix);
    assertNotEquals(m1Prefix, m3Prefix);
    assertNotEquals(m2Prefix, m3Prefix);
    verify(inputContext, atLeastOnce()).notifyProgress();
}