@Override
public void writeEmptyMatrixToHDFS(String fname, long rlen, long clen, int brlen, int bclen)
throws IOException, DMLRuntimeException {
Path path = new Path(fname);
FileSystem fs = FileSystem.get(ConfigurationManager.getCachedJobConf());
FSDataOutputStream writer = fs.create(path);
writer.writeBytes("1 1 0");
writer.close();
}
@Override
public void writeMatrixToHDFS(
MatrixBlock src, String fname, long rlen, long clen, int brlen, int bclen, long nnz)
throws IOException, DMLRuntimeException, DMLUnsupportedOperationException {
// prepare file access
JobConf job = new JobConf(ConfigurationManager.getCachedJobConf());
Path path = new Path(fname);
// if the file already exists on HDFS, remove it.
MapReduceTool.deleteFileIfExistOnHDFS(fname);
// core write
writeTextCellMatrixToHDFS(path, job, src, rlen, clen);
}