org.apache.sysds.runtime.matrix.data

Interface MatrixBlockDataOutput

All Known Implementing Classes:

CacheDataOutput, FastBufferedDataOutputStream

public interface MatrixBlockDataOutput

Any data output that is intended to support fast serialization / write of entire blocks should implement this interface. On write of a matrix block we check if the output stream is an implementation of this interface, if yes we directly pass the entire block instead of value-by-value. Known implementation classes: - CacheDataOutput (cache serialization into in-memory write buffer) - FastBufferedDataOutputStream (cache eviction to local file system)

Method Summary

Modifier and Type	Method and Description
void	writeDoubleArray(int len, double[] varr) Writes the double array of a dense block to the data output.
void	writeSparseRows(int rlen, SparseBlock rows) Writes the sparse rows array of a sparse block to the data output.

Method Detail

writeDoubleArray

void writeDoubleArray(int len,
                      double[] varr)
               throws IOException

Writes the double array of a dense block to the data output.

Parameters:

len - ?

varr - ?

Throws:

IOException - if IOException occurs

writeSparseRows

void writeSparseRows(int rlen,
                     SparseBlock rows)
              throws IOException

Writes the sparse rows array of a sparse block to the data output.

Parameters:

rlen - ?

rows - sparse block

Throws:

IOException - if IOException occurs