Examples with InMemoryReader org.apache.tez.runtime.library.common.shuffle.orderedgrouped.InMemoryReader used on opensource projects

Example 1 with InMemoryReader

use of org.apache.tez.runtime.library.common.shuffle.orderedgrouped.InMemoryReader in project tez by apache.

the class TestValuesIterator method createInMemStreams.

/**
 * create inmemory segments
 *
 * @return
 * @throws IOException
 */
@SuppressWarnings("unchecked")
public List<TezMerger.Segment> createInMemStreams() throws IOException {
    int numberOfStreams = Math.max(2, rnd.nextInt(10));
    LOG.info("No of streams : " + numberOfStreams);
    SerializationFactory serializationFactory = new SerializationFactory(conf);
    Serializer keySerializer = serializationFactory.getSerializer(keyClass);
    Serializer valueSerializer = serializationFactory.getSerializer(valClass);
    LocalDirAllocator localDirAllocator = new LocalDirAllocator(TezRuntimeFrameworkConfigs.LOCAL_DIRS);
    InputContext context = createTezInputContext();
    MergeManager mergeManager = new MergeManager(conf, fs, localDirAllocator, context, null, null, null, null, null, 1024 * 1024 * 10, null, false, -1);
    DataOutputBuffer keyBuf = new DataOutputBuffer();
    DataOutputBuffer valBuf = new DataOutputBuffer();
    DataInputBuffer keyIn = new DataInputBuffer();
    DataInputBuffer valIn = new DataInputBuffer();
    keySerializer.open(keyBuf);
    valueSerializer.open(valBuf);
    List<TezMerger.Segment> segments = new LinkedList<TezMerger.Segment>();
    for (int i = 0; i < numberOfStreams; i++) {
        BoundedByteArrayOutputStream bout = new BoundedByteArrayOutputStream(1024 * 1024);
        InMemoryWriter writer = new InMemoryWriter(bout);
        Map<Writable, Writable> data = createData();
        // write data
        for (Map.Entry<Writable, Writable> entry : data.entrySet()) {
            keySerializer.serialize(entry.getKey());
            valueSerializer.serialize(entry.getValue());
            keyIn.reset(keyBuf.getData(), 0, keyBuf.getLength());
            valIn.reset(valBuf.getData(), 0, valBuf.getLength());
            writer.append(keyIn, valIn);
            originalData.put(entry.getKey(), entry.getValue());
            keyBuf.reset();
            valBuf.reset();
            keyIn.reset();
            valIn.reset();
        }
        IFile.Reader reader = new InMemoryReader(mergeManager, null, bout.getBuffer(), 0, bout.getBuffer().length);
        segments.add(new TezMerger.Segment(reader, null));
        data.clear();
        writer.close();
    }
    return segments;
}

Example 2 with InMemoryReader

use of org.apache.tez.runtime.library.common.shuffle.orderedgrouped.InMemoryReader in project tez by apache.

the class TestTezMerger method createInMemorySegments.

private List<TezMerger.Segment> createInMemorySegments(int segmentCount, int keysPerSegment) throws IOException {
    List<TezMerger.Segment> segmentList = Lists.newLinkedList();
    Random rnd = new Random();
    DataInputBuffer key = new DataInputBuffer();
    DataInputBuffer value = new DataInputBuffer();
    for (int i = 0; i < segmentCount; i++) {
        BoundedByteArrayOutputStream stream = new BoundedByteArrayOutputStream(10000);
        InMemoryWriter writer = new InMemoryWriter(stream);
        for (int j = 0; j < keysPerSegment; j++) {
            populateData(new IntWritable(rnd.nextInt()), new LongWritable(rnd.nextLong()), key, value);
            writer.append(key, value);
        }
        writer.close();
        InMemoryReader reader = new InMemoryReader(merger, null, stream.getBuffer(), 0, stream.getLimit());
        segmentList.add(new TezMerger.Segment(reader, null));
    }
    return segmentList;
}

Example 3 with InMemoryReader

use of org.apache.tez.runtime.library.common.shuffle.orderedgrouped.InMemoryReader in project tez by apache.

the class TestIFile method testConcatenatedZlibPadding.

// test concatenated zlib input - as in multiple map outputs during shuffle
// This specific input is valid but the decompressor can leave lingering
// bytes between segments. If the lingering bytes aren't handled correctly,
// the stream will get out-of-sync.
@Test(timeout = 5000)
public void testConcatenatedZlibPadding() throws IOException, URISyntaxException {
    byte[] bytes;
    long compTotal = 0;
    // Known raw and compressed lengths of input
    long[] raws = { 2392, 102314, 42576, 31432, 25090 };
    long[] compressed = { 723, 25396, 10926, 8203, 6665 };
    CompressionCodecFactory codecFactory = new CompressionCodecFactory(new Configuration());
    codec = codecFactory.getCodecByClassName("org.apache.hadoop.io.compress.DefaultCodec");
    URL url = getClass().getClassLoader().getResource("TestIFile_concatenated_compressed.bin");
    assertNotEquals("IFileinput file must exist", null, url);
    Path p = new Path(url.toURI());
    FSDataInputStream inStream = localFs.open(p);
    for (int i = 0; i < 5; i++) {
        bytes = new byte[(int) raws[i]];
        assertEquals("Compressed stream out-of-sync", inStream.getPos(), compTotal);
        IFile.Reader.readToMemory(bytes, inStream, (int) compressed[i], codec, false, -1);
        compTotal += compressed[i];
        // Now read the data
        InMemoryReader inMemReader = new InMemoryReader(null, new InputAttemptIdentifier(0, 0), bytes, 0, bytes.length);
        DataInputBuffer keyIn = new DataInputBuffer();
        DataInputBuffer valIn = new DataInputBuffer();
        Deserializer<Text> keyDeserializer;
        Deserializer<IntWritable> valDeserializer;
        SerializationFactory serializationFactory = new SerializationFactory(defaultConf);
        keyDeserializer = serializationFactory.getDeserializer(Text.class);
        valDeserializer = serializationFactory.getDeserializer(IntWritable.class);
        keyDeserializer.open(keyIn);
        valDeserializer.open(valIn);
        while (inMemReader.nextRawKey(keyIn)) {
            inMemReader.nextRawValue(valIn);
        }
    }
    inStream.close();
}

Example 4 with InMemoryReader

use of org.apache.tez.runtime.library.common.shuffle.orderedgrouped.InMemoryReader in project tez by apache.

the class TestIFile method readUsingInMemoryReader.

private void readUsingInMemoryReader(byte[] bytes, List<KVPair> originalData) throws IOException {
    InMemoryReader inMemReader = new InMemoryReader(null, new InputAttemptIdentifier(0, 0), bytes, 0, bytes.length);
    verifyData(inMemReader, originalData);
}