Examples with BaseSingleColumnMultiValueReader com.linkedin.pinot.core.io.reader.BaseSingleColumnMultiValueReader used on opensource projects

Example 1 with BaseSingleColumnMultiValueReader

use of com.linkedin.pinot.core.io.reader.BaseSingleColumnMultiValueReader in project pinot by linkedin.

the class ForwardIndexReaderBenchmark method multiValuedReadBenchMarkV1.

public static void multiValuedReadBenchMarkV1(File file, int numDocs, int totalNumValues, int maxEntriesPerDoc, int columnSizeInBits) throws Exception {
    System.out.println("******************************************************************");
    System.out.println("Analyzing " + file.getName() + " numDocs:" + numDocs + ", totalNumValues:" + totalNumValues + ", maxEntriesPerDoc:" + maxEntriesPerDoc + ", numBits:" + columnSizeInBits);
    long start, end;
    boolean readFile = true;
    boolean randomRead = true;
    boolean contextualRead = true;
    boolean signed = false;
    boolean isMmap = false;
    PinotDataBuffer heapBuffer = PinotDataBuffer.fromFile(file, ReadMode.mmap, FileChannel.MapMode.READ_ONLY, "benchmarking");
    BaseSingleColumnMultiValueReader reader = new com.linkedin.pinot.core.io.reader.impl.v1.FixedBitMultiValueReader(heapBuffer, numDocs, totalNumValues, columnSizeInBits, signed);
    int[] intArray = new int[maxEntriesPerDoc];
    File outfile = new File("/tmp/" + file.getName() + ".raw");
    FileWriter fw = new FileWriter(outfile);
    for (int i = 0; i < numDocs; i++) {
        int length = reader.getIntArray(i, intArray);
        StringBuilder sb = new StringBuilder();
        String delim = "";
        for (int j = 0; j < length; j++) {
            sb.append(delim);
            sb.append(intArray[j]);
            delim = ",";
        }
        fw.write(sb.toString());
        fw.write("\n");
    }
    fw.close();
    // sequential read
    if (readFile) {
        DescriptiveStatistics stats = new DescriptiveStatistics();
        RandomAccessFile raf = new RandomAccessFile(file, "rw");
        ByteBuffer buffer = ByteBuffer.allocateDirect((int) file.length());
        raf.getChannel().read(buffer);
        for (int run = 0; run < MAX_RUNS; run++) {
            long length = file.length();
            start = System.currentTimeMillis();
            for (int i = 0; i < length; i++) {
                byte b = buffer.get(i);
            }
            end = System.currentTimeMillis();
            stats.addValue((end - start));
        }
        System.out.println("v1 multi value read bytes stats for " + file.getName());
        System.out.println(stats.toString().replaceAll("\n", ", ") + " raw:" + Arrays.toString(stats.getValues()));
        raf.close();
    }
    if (randomRead) {
        DescriptiveStatistics stats = new DescriptiveStatistics();
        for (int run = 0; run < MAX_RUNS; run++) {
            start = System.currentTimeMillis();
            for (int i = 0; i < numDocs; i++) {
                int length = reader.getIntArray(i, intArray);
            }
            end = System.currentTimeMillis();
            stats.addValue((end - start));
        }
        System.out.println("v1 multi value sequential read one stats for " + file.getName());
        System.out.println(stats.toString().replaceAll("\n", ", ") + " raw:" + Arrays.toString(stats.getValues()));
    }
    if (contextualRead) {
        DescriptiveStatistics stats = new DescriptiveStatistics();
        for (int run = 0; run < MAX_RUNS; run++) {
            MultiValueReaderContext context = (MultiValueReaderContext) reader.createContext();
            start = System.currentTimeMillis();
            for (int i = 0; i < numDocs; i++) {
                int length = reader.getIntArray(i, intArray, context);
            }
            end = System.currentTimeMillis();
            // System.out.println("RUN:" + run + "Time:" + (end-start));
            stats.addValue((end - start));
        }
        System.out.println("v1 multi value sequential read one with context stats for " + file.getName());
        System.out.println(stats.toString().replaceAll("\n", ", ") + " raw:" + Arrays.toString(stats.getValues()));
    }
    reader.close();
    heapBuffer.close();
    System.out.println("******************************************************************");
}