/**
* @param path
* @param job
* @param fs
* @param dest
* @param rlen
* @param clen
* @param brlen
* @param bclen
* @throws IOException
* @throws IllegalAccessException
* @throws InstantiationException
*/
@SuppressWarnings("deprecation")
private void readBinaryBlockMatrixBlocksFromHDFS(
Path path,
JobConf job,
FileSystem fs,
Collection<IndexedMatrixValue> dest,
long rlen,
long clen,
int brlen,
int bclen)
throws IOException {
MatrixIndexes key = new MatrixIndexes();
MatrixBlock value = new MatrixBlock();
// set up preferred custom serialization framework for binary block format
if (MRJobConfiguration.USE_BINARYBLOCK_SERIALIZATION)
MRJobConfiguration.addBinaryBlockSerializationFramework(job);
for (Path lpath : getSequenceFilePaths(fs, path)) // 1..N files
{
// directly read from sequence files (individual partfiles)
SequenceFile.Reader reader = new SequenceFile.Reader(fs, lpath, job);
try {
while (reader.next(key, value)) {
int row_offset = (int) (key.getRowIndex() - 1) * brlen;
int col_offset = (int) (key.getColumnIndex() - 1) * bclen;
int rows = value.getNumRows();
int cols = value.getNumColumns();
// bound check per block
if (row_offset + rows < 0
|| row_offset + rows > rlen
|| col_offset + cols < 0
|| col_offset + cols > clen) {
throw new IOException(
"Matrix block ["
+ (row_offset + 1)
+ ":"
+ (row_offset + rows)
+ ","
+ (col_offset + 1)
+ ":"
+ (col_offset + cols)
+ "] "
+ "out of overall matrix range [1:"
+ rlen
+ ",1:"
+ clen
+ "].");
}
// copy block to result
dest.add(new IndexedMatrixValue(new MatrixIndexes(key), new MatrixBlock(value)));
}
} finally {
IOUtilFunctions.closeSilently(reader);
}
}
}
private void processBinaryCombineInstruction(CombineBinaryInstruction ins, Reporter reporter)
throws IOException {
IndexedMatrixValue in1 = cachedValues.getFirst(ins.input1);
IndexedMatrixValue in2 = cachedValues.getFirst(ins.input2);
if (in1 == null && in2 == null) return;
MatrixIndexes indexes;
if (in1 != null) indexes = in1.getIndexes();
else indexes = in2.getIndexes();
// if one of the inputs is null, then it is a all zero block
if (in1 == null) {
in1 = zeroInput;
in1.getValue().reset(in2.getValue().getNumRows(), in2.getValue().getNumColumns());
}
if (in2 == null) {
in2 = zeroInput;
in2.getValue().reset(in1.getValue().getNumRows(), in1.getValue().getNumColumns());
}
// System.out.println("in1:"+in1);
// System.out.println("in2:"+in2);
// process instruction
try {
/*in1.getValue().combineOperations(in2.getValue(), collectFinalMultipleOutputs,
reporter, keyBuff, valueBuff, getOutputIndexes(ins.output));*/
ArrayList<Integer> outputIndexes = outputIndexesMapping.get(ins.output);
for (int r = 0; r < in1.getValue().getNumRows(); r++)
for (int c = 0; c < in1.getValue().getNumColumns(); c++) {
Pair<Integer, Integer> blockSize = outputBlockSizes.get(ins.output);
keyBuff.setIndexes(
UtilFunctions.cellIndexCalculation(indexes.getRowIndex(), blockSize.getKey(), r),
UtilFunctions.cellIndexCalculation(
indexes.getColumnIndex(), blockSize.getValue(), c));
valueBuff.setValue(in1.getValue().getValue(r, c));
double temp = in2.getValue().getValue(r, c);
if (ins.isSecondInputWeight()) {
valueBuff.setWeight(temp);
valueBuff.setOtherValue(0);
} else {
valueBuff.setWeight(1);
valueBuff.setOtherValue(temp);
}
for (int i : outputIndexes) {
collectFinalMultipleOutputs.collectOutput(keyBuff, valueBuff, i, reporter);
// System.out.println("output: "+keyBuff+" -- "+valueBuff);
}
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
protected Tuple2<MatrixIndexes, MatrixBlock> computeNext(Tuple2<MatrixIndexes, MatrixBlock> arg)
throws Exception {
// unpack partition key-value pairs
MatrixIndexes ix = arg._1();
MatrixBlock in1 = arg._2();
// get the rhs block
int rix = (int) ((_vtype == VectorType.COL_VECTOR) ? ix.getRowIndex() : 1);
int cix = (int) ((_vtype == VectorType.COL_VECTOR) ? 1 : ix.getColumnIndex());
MatrixBlock in2 = _pmV.getMatrixBlock(rix, cix);
// execute the binary operation
MatrixBlock ret = (MatrixBlock) (in1.binaryOperations(_op, in2, new MatrixBlock()));
return new Tuple2<MatrixIndexes, MatrixBlock>(ix, ret);
}
/**
* Note: For efficiency, we directly use SequenceFile.Reader instead of SequenceFileInputFormat-
* InputSplits-RecordReader (SequenceFileRecordReader). First, this has no drawbacks since the
* SequenceFileRecordReader internally uses SequenceFile.Reader as well. Second, it is
* advantageous if the actual sequence files are larger than the file splits created by
* informat.getSplits (which is usually aligned to the HDFS block size) because then there is
* overhead for finding the actual split between our 1k-1k blocks. This case happens if the read
* matrix was create by CP or when jobs directly write to large output files (e.g., parfor matrix
* partitioning).
*
* @param path
* @param job
* @param fs
* @param dest
* @param rlen
* @param clen
* @param brlen
* @param bclen
* @throws IOException
* @throws IllegalAccessException
* @throws InstantiationException
* @throws DMLRuntimeException
*/
@SuppressWarnings("deprecation")
private static void readBinaryBlockMatrixFromHDFS(
Path path,
JobConf job,
FileSystem fs,
MatrixBlock dest,
long rlen,
long clen,
int brlen,
int bclen)
throws IOException, DMLRuntimeException {
boolean sparse = dest.isInSparseFormat();
MatrixIndexes key = new MatrixIndexes();
MatrixBlock value = new MatrixBlock();
// set up preferred custom serialization framework for binary block format
if (MRJobConfiguration.USE_BINARYBLOCK_SERIALIZATION)
MRJobConfiguration.addBinaryBlockSerializationFramework(job);
for (Path lpath : getSequenceFilePaths(fs, path)) // 1..N files
{
// directly read from sequence files (individual partfiles)
SequenceFile.Reader reader = new SequenceFile.Reader(fs, lpath, job);
try {
// note: next(key, value) does not yet exploit the given serialization classes, record
// reader does but is generally slower.
while (reader.next(key, value)) {
// empty block filter (skip entire block)
if (value.isEmptyBlock(false)) continue;
int row_offset = (int) (key.getRowIndex() - 1) * brlen;
int col_offset = (int) (key.getColumnIndex() - 1) * bclen;
int rows = value.getNumRows();
int cols = value.getNumColumns();
// bound check per block
if (row_offset + rows < 0
|| row_offset + rows > rlen
|| col_offset + cols < 0
|| col_offset + cols > clen) {
throw new IOException(
"Matrix block ["
+ (row_offset + 1)
+ ":"
+ (row_offset + rows)
+ ","
+ (col_offset + 1)
+ ":"
+ (col_offset + cols)
+ "] "
+ "out of overall matrix range [1:"
+ rlen
+ ",1:"
+ clen
+ "].");
}
// copy block to result
if (sparse) {
dest.appendToSparse(value, row_offset, col_offset);
// note: append requires final sort
} else {
dest.copy(
row_offset, row_offset + rows - 1, col_offset, col_offset + cols - 1, value, false);
}
}
} finally {
IOUtilFunctions.closeSilently(reader);
}
}
if (sparse && clen > bclen) {
// no need to sort if 1 column block since always sorted
dest.sortSparseRows();
}
}