Package org.apache.sysds.runtime.compress.io

Class WriterCompressed

java.lang.Object

org.apache.sysds.runtime.io.MatrixWriter

org.apache.sysds.runtime.compress.io.WriterCompressed

public final class WriterCompressed
extends MatrixWriter

Constructor Summary

Constructors

Constructor	Description
WriterCompressed()

Method Summary

Modifier and Type	Method	Description
static WriterCompressed	create(FileFormatProperties props)
static void	writeCompressedMatrixToHDFS(MatrixBlock src, String fname)
static void	writeCompressedMatrixToHDFS(MatrixBlock src, String fname, int blen)
static void	writeCompressedMatrixToHDFS(MatrixBlock src, String fname, long rlen, long clen, int blen, long nnz, boolean diag)
void	writeEmptyMatrixToHDFS(String fname, long rlen, long clen, int blen)	Writes a minimal entry to represent an empty matrix on hdfs.
long	writeMatrixFromStream(String fname, OOCStream<IndexedMatrixValue> stream, long rlen, long clen, int blen)	Consumes an out-of-core stream of matrix blocks and writes them to the target output path.
void	writeMatrixToHDFS(MatrixBlock src, String fname, long rlen, long clen, int blen, long nnz, boolean diag)
static void	writeRDDToHDFS(org.apache.spark.api.java.JavaPairRDD<MatrixIndexes,MatrixBlock> src, String path)
static void	writeRDDToHDFS(org.apache.spark.api.java.JavaPairRDD<MatrixIndexes,MatrixBlock> src, String path, int blen, DataCharacteristics mc)

Methods inherited from class org.apache.sysds.runtime.io.MatrixWriter

createMatrixBlocksForReuse, getMatrixBlockForReuse, setForcedParallel, writeMatrixToHDFS

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

WriterCompressed

public WriterCompressed()

Method Details

create

public static WriterCompressed create(FileFormatProperties props)

writeCompressedMatrixToHDFS

public static void writeCompressedMatrixToHDFS(MatrixBlock src,
 String fname)
                                        throws IOException

Throws:

IOException

writeCompressedMatrixToHDFS

public static void writeCompressedMatrixToHDFS(MatrixBlock src,
 String fname,
 int blen)
                                        throws IOException

Throws:

IOException

writeCompressedMatrixToHDFS

public static void writeCompressedMatrixToHDFS(MatrixBlock src,
 String fname,
 long rlen,
 long clen,
 int blen,
 long nnz,
 boolean diag)
                                        throws IOException

Throws:

IOException

writeRDDToHDFS

public static void writeRDDToHDFS(org.apache.spark.api.java.JavaPairRDD<MatrixIndexes,MatrixBlock> src,
 String path,
 int blen,
 DataCharacteristics mc)

writeRDDToHDFS

public static void writeRDDToHDFS(org.apache.spark.api.java.JavaPairRDD<MatrixIndexes,MatrixBlock> src,
 String path)

writeMatrixToHDFS

public void writeMatrixToHDFS(MatrixBlock src,
 String fname,
 long rlen,
 long clen,
 int blen,
 long nnz,
 boolean diag)
                       throws IOException

Specified by:

writeMatrixToHDFS in class MatrixWriter

Throws:

IOException

writeEmptyMatrixToHDFS

public void writeEmptyMatrixToHDFS(String fname,
 long rlen,
 long clen,
 int blen)
                            throws IOException

Description copied from class: MatrixWriter

Writes a minimal entry to represent an empty matrix on hdfs.

Specified by:

writeEmptyMatrixToHDFS in class MatrixWriter

Parameters:

fname - file name

rlen - number of rows

clen - number of columns

blen - number of rows/cols in block

Throws:

IOException - if IOException occurs

writeMatrixFromStream

public long writeMatrixFromStream(String fname,
 OOCStream<IndexedMatrixValue> stream,
 long rlen,
 long clen,
 int blen)

Description copied from class: MatrixWriter

Consumes an out-of-core stream of matrix blocks and writes them to the target output path. Implementations may choose single-file or multipart output depending on format and parallelism.

Specified by:

writeMatrixFromStream in class MatrixWriter

Parameters:

fname - The target output filename

stream - The OOC stream of matrix blocks to consume

rlen - The total number of rows in the matrix

clen - The total number of columns in the matrix

blen - The block size