List of usage examples for org.apache.hadoop.mapred LineRecordReader createKey
public LongWritable createKey()
From source file:edu.umn.cs.spatialHadoop.mapred.SpatialInputFormat.java
License:Open Source License
protected void listStatus(final FileSystem fs, Path dir, final List<FileStatus> result, BlockFilter filter) throws IOException { GlobalIndex<Partition> gindex = SpatialSite.getGlobalIndex(fs, dir); if (gindex == null) { FileStatus[] listStatus;//w w w . j a va 2s.co m if (OperationsParams.isWildcard(dir)) { // Wild card listStatus = fs.globStatus(dir); } else { listStatus = fs.listStatus(dir, SpatialSite.NonHiddenFileFilter); } // Add all files under this directory for (FileStatus status : listStatus) { if (status.isDir()) { listStatus(fs, status.getPath(), result, filter); } else if (status.getPath().getName().toLowerCase().endsWith(".list")) { LineRecordReader in = new LineRecordReader(fs.open(status.getPath()), 0, status.getLen(), Integer.MAX_VALUE); LongWritable key = in.createKey(); Text value = in.createValue(); while (in.next(key, value)) { result.add(fs.getFileStatus(new Path(status.getPath().getParent(), value.toString()))); } in.close(); } else { result.add(status); } } } else { final Path indexDir = OperationsParams.isWildcard(dir) ? dir.getParent() : dir; // Use the global index to limit files filter.selectCells(gindex, new ResultCollector<Partition>() { @Override public void collect(Partition partition) { try { Path cell_path = new Path(indexDir, partition.filename); if (!fs.exists(cell_path)) LOG.warn("Matched file not found: " + cell_path); result.add(fs.getFileStatus(cell_path)); } catch (IOException e) { e.printStackTrace(); } } }); } }
From source file:edu.umn.cs.spatialHadoop.operations.CatUnion.java
License:Open Source License
/** * Read all categories from the category file * @param categoryFile/*from w ww. j ava 2s . co m*/ * @param categoryShapes * @param idToCategory * @throws IOException */ private static void readCategories(Path categoryFile, Map<Integer, Integer> idToCategory) throws IOException { Map<Integer, String> idToCatName = new HashMap<Integer, String>(); FileSystem fsCategory = FileSystem.getLocal(new Configuration()); long categoryFileSize = fsCategory.getFileStatus(categoryFile).getLen(); if (categoryFileSize > 1024 * 1024) LOG.warn("Category file size is big: " + categoryFileSize); InputStream inCategory = fsCategory.open(categoryFile); LineRecordReader lineReader = new LineRecordReader(inCategory, 0, categoryFileSize, new Configuration()); LongWritable lineOffset = lineReader.createKey(); Text line = lineReader.createValue(); Set<String> catNames = new TreeSet<String>(); while (lineReader.next(lineOffset, line)) { int shape_id = TextSerializerHelper.consumeInt(line, ','); String cat_name = line.toString(); catNames.add(cat_name); idToCatName.put(shape_id, cat_name); } lineReader.close(); // Change category names to numbers Map<String, Integer> cat_name_to_id = new HashMap<String, Integer>(); int cat_id = 0; for (String cat_name : catNames) { cat_name_to_id.put(cat_name, cat_id++); } for (Map.Entry<Integer, String> entry : idToCatName.entrySet()) { idToCategory.put(entry.getKey(), cat_name_to_id.get(entry.getValue())); } }
From source file:mlbench.pagerank.PagerankMerge.java
License:Apache License
@SuppressWarnings({ "rawtypes", "unchecked" })
public static void main(String[] args) throws IOException, InterruptedException {
try {/*from w w w. j a v a 2 s . co m*/
parseArgs(args);
HashMap<String, String> conf = new HashMap<String, String>();
initConf(conf);
MPI_D.Init(args, MPI_D.Mode.Common, conf);
JobConf jobConf = new JobConf(confPath);
if (MPI_D.COMM_BIPARTITE_O != null) {
// O communicator
int rank = MPI_D.Comm_rank(MPI_D.COMM_BIPARTITE_O);
int size = MPI_D.Comm_size(MPI_D.COMM_BIPARTITE_O);
if (rank == 0) {
LOG.info(PagerankMerge.class.getSimpleName() + " O start.");
}
FileSplit[] inputs = DataMPIUtil.HDFSDataLocalLocator.getTaskInputs(MPI_D.COMM_BIPARTITE_O, jobConf,
inDir, rank);
for (int i = 0; i < inputs.length; i++) {
FileSplit fsplit = inputs[i];
LineRecordReader kvrr = new LineRecordReader(jobConf, fsplit);
LongWritable key = kvrr.createKey();
Text value = kvrr.createValue();
{
while (kvrr.next(key, value)) {
String line_text = value.toString();
final String[] line = line_text.split("\t");
if (line.length >= 2) {
MPI_D.Send(new IntWritable(Integer.parseInt(line[0])), new Text(line[1]));
}
}
}
}
} else if (MPI_D.COMM_BIPARTITE_A != null) {
// A communicator
int rank = MPI_D.Comm_rank(MPI_D.COMM_BIPARTITE_A);
if (rank == 0) {
LOG.info(PagerankMerge.class.getSimpleName() + " A start.");
}
HadoopWriter<IntWritable, Text> outrw = HadoopIOUtil.getNewWriter(jobConf, outDir,
IntWritable.class, Text.class, TextOutputFormat.class, null, rank, MPI_D.COMM_BIPARTITE_A);
IntWritable oldKey = null;
double next_rank = 0;
double previous_rank = 0;
double diff = 0;
int local_diffs = 0;
random_coeff = (1 - mixing_c) / (double) number_nodes;
converge_threshold = ((double) 1.0 / (double) number_nodes) / 10;
Object[] keyValue = MPI_D.Recv();
while (keyValue != null) {
IntWritable key = (IntWritable) keyValue[0];
Text value = (Text) keyValue[1];
if (oldKey == null) {
oldKey = key;
}
if (!key.equals(oldKey)) {
next_rank = next_rank * mixing_c + random_coeff;
outrw.write(oldKey, new Text("v" + next_rank));
diff = Math.abs(previous_rank - next_rank);
if (diff > converge_threshold) {
local_diffs += 1;
}
oldKey = key;
next_rank = 0;
previous_rank = 0;
}
String cur_value_str = value.toString();
if (cur_value_str.charAt(0) == 's') {
previous_rank = Double.parseDouble(cur_value_str.substring(1));
} else {
next_rank += Double.parseDouble(cur_value_str.substring(1));
}
keyValue = MPI_D.Recv();
}
if (previous_rank != 0) {
next_rank = next_rank * mixing_c + random_coeff;
outrw.write(oldKey, new Text("v" + next_rank));
diff = Math.abs(previous_rank - next_rank);
if (diff > converge_threshold)
local_diffs += 1;
}
outrw.close();
reduceDiffs(local_diffs, rank);
}
MPI_D.Finalize();
} catch (MPI_D_Exception e) {
e.printStackTrace();
}
}
From source file:mlbench.pagerank.PagerankNaive.java
License:Apache License
@SuppressWarnings({ "rawtypes", "unchecked" })
public static void main(String[] args) throws IOException, InterruptedException {
try {/*from ww w . j ava 2s . c o m*/
parseArgs(args);
HashMap<String, String> conf = new HashMap<String, String>();
initConf(conf);
MPI_D.Init(args, MPI_D.Mode.Common, conf);
JobConf jobConf = new JobConf(confPath);
if (MPI_D.COMM_BIPARTITE_O != null) {
// O communicator
int rank = MPI_D.Comm_rank(MPI_D.COMM_BIPARTITE_O);
int size = MPI_D.Comm_size(MPI_D.COMM_BIPARTITE_O);
if (rank == 0) {
LOG.info(PagerankNaive.class.getSimpleName() + " O start.");
}
FileSplit[] inputs1 = DataMPIUtil.HDFSDataLocalLocator.getTaskInputs(MPI_D.COMM_BIPARTITE_O,
jobConf, edgeDir, rank);
FileSplit[] inputs2 = DataMPIUtil.HDFSDataLocalLocator.getTaskInputs(MPI_D.COMM_BIPARTITE_O,
jobConf, vecDir, rank);
FileSplit[] inputs = (FileSplit[]) ArrayUtils.addAll(inputs2, inputs1);
for (int i = 0; i < inputs.length; i++) {
FileSplit fsplit = inputs[i];
LineRecordReader kvrr = new LineRecordReader(jobConf, fsplit);
LongWritable key = kvrr.createKey();
Text value = kvrr.createValue();
{
IntWritable k = new IntWritable();
Text v = new Text();
while (kvrr.next(key, value)) {
String line_text = value.toString();
// ignore comments in edge file
if (line_text.startsWith("#"))
continue;
final String[] line = line_text.split("\t");
if (line.length < 2)
continue;
// vector : ROWID VALUE('vNNNN')
if (line[1].charAt(0) == 'v') {
k.set(Integer.parseInt(line[0]));
v.set(line[1]);
MPI_D.Send(k, v);
} else {
/*
* In other matrix-vector multiplication, we
* output (dst, src) here However, In PageRank,
* the matrix-vector computation formula is M^T
* * v. Therefore, we output (src,dst) here.
*/
int src_id = Integer.parseInt(line[0]);
int dst_id = Integer.parseInt(line[1]);
k.set(src_id);
v.set(line[1]);
MPI_D.Send(k, v);
if (make_symmetric == 1) {
k.set(dst_id);
v.set(line[0]);
MPI_D.Send(k, v);
}
}
}
}
}
} else if (MPI_D.COMM_BIPARTITE_A != null) {
// A communicator
int rank = MPI_D.Comm_rank(MPI_D.COMM_BIPARTITE_A);
if (rank == 0) {
LOG.info(PagerankNaive.class.getSimpleName() + " A start.");
}
HadoopWriter<IntWritable, Text> outrw = HadoopIOUtil.getNewWriter(jobConf, outDir,
IntWritable.class, Text.class, TextOutputFormat.class, null, rank, MPI_D.COMM_BIPARTITE_A);
IntWritable oldKey = null;
int i;
double cur_rank = 0;
ArrayList<Integer> dst_nodes_list = new ArrayList<Integer>();
Object[] keyValue = MPI_D.Recv();
while (keyValue != null) {
IntWritable key = (IntWritable) keyValue[0];
Text value = (Text) keyValue[1];
if (oldKey == null) {
oldKey = key;
}
// A new key arrives
if (!key.equals(oldKey)) {
outrw.write(oldKey, new Text("s" + cur_rank));
int outdeg = dst_nodes_list.size();
if (outdeg > 0) {
cur_rank = cur_rank / (double) outdeg;
}
for (i = 0; i < outdeg; i++) {
outrw.write(new IntWritable(dst_nodes_list.get(i)), new Text("v" + cur_rank));
}
oldKey = key;
cur_rank = 0;
dst_nodes_list = new ArrayList<Integer>();
}
// common record
String line_text = value.toString();
final String[] line = line_text.split("\t");
if (line.length == 1) {
if (line_text.charAt(0) == 'v') { // vector : VALUE
cur_rank = Double.parseDouble(line_text.substring(1));
} else { // edge : ROWID
dst_nodes_list.add(Integer.parseInt(line[0]));
}
}
keyValue = MPI_D.Recv();
}
// write the left part
if (cur_rank != 0) {
outrw.write(oldKey, new Text("s" + cur_rank));
int outdeg = dst_nodes_list.size();
if (outdeg > 0) {
cur_rank = cur_rank / (double) outdeg;
}
for (i = 0; i < outdeg; i++) {
outrw.write(new IntWritable(dst_nodes_list.get(i)), new Text("v" + cur_rank));
}
}
outrw.close();
}
MPI_D.Finalize();
} catch (MPI_D_Exception e) {
e.printStackTrace();
}
}