private void writeTest(FileSystem fs, int count, Path file, byte[][] fieldsData) throws IOException, SerDeException { fs.delete(file, true); RCFileOutputFormat.setColumnNumber(conf, fieldsData.length); RCFile.Writer writer = new RCFile.Writer(fs, conf, file, null, new DefaultCodec()); BytesRefArrayWritable bytes = new BytesRefArrayWritable(fieldsData.length); for (int i = 0; i < fieldsData.length; i++) { BytesRefWritable cu = null; cu = new BytesRefWritable(fieldsData[i], 0, fieldsData[i].length); bytes.set(i, cu); } for (int i = 0; i < count; i++) { writer.append(bytes); } writer.close(); long fileLen = fs.getFileStatus(file).getLen(); System.out.println( "The file size of RCFile with " + bytes.size() + " number columns and " + count + " number rows is " + fileLen); }
private void writeRCFileTest( FileSystem fs, int rowCount, Path file, int columnNum, CompressionCodec codec) throws IOException { fs.delete(file, true); resetRandomGenerators(); RCFileOutputFormat.setColumnNumber(conf, columnNum); RCFile.Writer writer = new RCFile.Writer(fs, conf, file, null, codec); byte[][] columnRandom; BytesRefArrayWritable bytes = new BytesRefArrayWritable(columnNum); columnRandom = new byte[columnNum][]; for (int i = 0; i < columnNum; i++) { BytesRefWritable cu = new BytesRefWritable(); bytes.set(i, cu); } for (int i = 0; i < rowCount; i++) { nextRandomRow(columnRandom, bytes); writer.append(bytes); } writer.close(); }
private void writeThenReadByRecordReader( int intervalRecordCount, int writeCount, int splitNumber, long minSplitSize, CompressionCodec codec) throws IOException { Path testDir = new Path(System.getProperty("test.data.dir", ".") + "/mapred/testsmallfirstsplit"); Path testFile = new Path(testDir, "test_rcfile"); fs.delete(testFile, true); Configuration cloneConf = new Configuration(conf); RCFileOutputFormat.setColumnNumber(cloneConf, bytesArray.length); cloneConf.setInt(RCFile.RECORD_INTERVAL_CONF_STR, intervalRecordCount); RCFile.Writer writer = new RCFile.Writer(fs, cloneConf, testFile, null, codec); BytesRefArrayWritable bytes = new BytesRefArrayWritable(bytesArray.length); for (int i = 0; i < bytesArray.length; i++) { BytesRefWritable cu = null; cu = new BytesRefWritable(bytesArray[i], 0, bytesArray[i].length); bytes.set(i, cu); } for (int i = 0; i < writeCount; i++) { if (i == intervalRecordCount) { System.out.println("write position:" + writer.getLength()); } writer.append(bytes); } writer.close(); RCFileInputFormat inputFormat = new RCFileInputFormat(); JobConf jonconf = new JobConf(cloneConf); jonconf.set("mapred.input.dir", testDir.toString()); jonconf.setLong("mapred.min.split.size", minSplitSize); InputSplit[] splits = inputFormat.getSplits(jonconf, splitNumber); assertEquals("splits length should be " + splitNumber, splits.length, splitNumber); int readCount = 0; for (int i = 0; i < splits.length; i++) { int previousReadCount = readCount; RecordReader rr = inputFormat.getRecordReader(splits[i], jonconf, Reporter.NULL); Object key = rr.createKey(); Object value = rr.createValue(); while (rr.next(key, value)) { readCount++; } System.out.println("The " + i + "th split read " + (readCount - previousReadCount)); } assertEquals("readCount should be equal to writeCount", readCount, writeCount); }
public void testReadCorruptFile() throws IOException, SerDeException { fs.delete(file, true); byte[][] record = {null, null, null, null, null, null, null, null}; RCFileOutputFormat.setColumnNumber(conf, expectedFieldsData.length); RCFile.Writer writer = new RCFile.Writer(fs, conf, file, null, new DefaultCodec()); BytesRefArrayWritable bytes = new BytesRefArrayWritable(record.length); final int recCount = 100; Random rand = new Random(); for (int recIdx = 0; recIdx < recCount; recIdx++) { for (int i = 0; i < record.length; i++) { record[i] = new Integer(rand.nextInt()).toString().getBytes("UTF-8"); } for (int i = 0; i < record.length; i++) { BytesRefWritable cu = new BytesRefWritable(record[i], 0, record[i].length); bytes.set(i, cu); } writer.append(bytes); bytes.clear(); } writer.close(); // Insert junk in middle of file. Assumes file is on local disk. RandomAccessFile raf = new RandomAccessFile(file.toUri().getPath(), "rw"); long corruptOffset = raf.length() / 2; LOG.info("corrupting " + raf + " at offset " + corruptOffset); raf.seek(corruptOffset); raf.writeBytes("junkjunkjunkjunkjunkjunkjunkjunk"); raf.close(); // Set the option for tolerating corruptions. The read should succeed. Configuration tmpConf = new Configuration(conf); tmpConf.setBoolean("hive.io.rcfile.tolerate.corruptions", true); RCFile.Reader reader = new RCFile.Reader(fs, file, tmpConf); LongWritable rowID = new LongWritable(); while (true) { boolean more = reader.next(rowID); if (!more) { break; } BytesRefArrayWritable cols = new BytesRefArrayWritable(); reader.getCurrentRow(cols); cols.resetValid(8); } reader.close(); }
public void testSimpleReadAndWrite() throws IOException, SerDeException { fs.delete(file, true); byte[][] record_1 = { "123".getBytes("UTF-8"), "456".getBytes("UTF-8"), "789".getBytes("UTF-8"), "1000".getBytes("UTF-8"), "5.3".getBytes("UTF-8"), "hive and hadoop".getBytes("UTF-8"), new byte[0], "NULL".getBytes("UTF-8") }; byte[][] record_2 = { "100".getBytes("UTF-8"), "200".getBytes("UTF-8"), "123".getBytes("UTF-8"), "1000".getBytes("UTF-8"), "5.3".getBytes("UTF-8"), "hive and hadoop".getBytes("UTF-8"), new byte[0], "NULL".getBytes("UTF-8") }; RCFileOutputFormat.setColumnNumber(conf, expectedFieldsData.length); RCFile.Writer writer = new RCFile.Writer(fs, conf, file, null, new DefaultCodec()); BytesRefArrayWritable bytes = new BytesRefArrayWritable(record_1.length); for (int i = 0; i < record_1.length; i++) { BytesRefWritable cu = new BytesRefWritable(record_1[i], 0, record_1[i].length); bytes.set(i, cu); } writer.append(bytes); bytes.clear(); for (int i = 0; i < record_2.length; i++) { BytesRefWritable cu = new BytesRefWritable(record_2[i], 0, record_2[i].length); bytes.set(i, cu); } writer.append(bytes); writer.close(); Object[] expectedRecord_1 = { new ByteWritable((byte) 123), new ShortWritable((short) 456), new IntWritable(789), new LongWritable(1000), new DoubleWritable(5.3), new Text("hive and hadoop"), null, null }; Object[] expectedRecord_2 = { new ByteWritable((byte) 100), new ShortWritable((short) 200), new IntWritable(123), new LongWritable(1000), new DoubleWritable(5.3), new Text("hive and hadoop"), null, null }; RCFile.Reader reader = new RCFile.Reader(fs, file, conf); LongWritable rowID = new LongWritable(); for (int i = 0; i < 2; i++) { reader.next(rowID); BytesRefArrayWritable cols = new BytesRefArrayWritable(); reader.getCurrentRow(cols); cols.resetValid(8); Object row = serDe.deserialize(cols); StructObjectInspector oi = (StructObjectInspector) serDe.getObjectInspector(); List<? extends StructField> fieldRefs = oi.getAllStructFieldRefs(); assertEquals("Field size should be 8", 8, fieldRefs.size()); for (int j = 0; j < fieldRefs.size(); j++) { Object fieldData = oi.getStructFieldData(row, fieldRefs.get(j)); Object standardWritableData = ObjectInspectorUtils.copyToStandardObject( fieldData, fieldRefs.get(j).getFieldObjectInspector(), ObjectInspectorCopyOption.WRITABLE); if (i == 0) { assertEquals("Field " + i, standardWritableData, expectedRecord_1[j]); } else { assertEquals("Field " + i, standardWritableData, expectedRecord_2[j]); } } } reader.close(); }