Examples of LogMergePolicy

org.apache.lucene.index.LogMergePolicy

This class implements a {@link MergePolicy} that triesto merge segments into levels of exponentially increasing size, where each level has fewer segments than the value of the merge factor. Whenever extra segments (beyond the merge factor upper bound) are encountered, all segments within the level are merged. You can get or set the merge factor using {@link #getMergeFactor()} and{@link #setMergeFactor(int)} respectively.
This class is abstract and requires a subclass to define the {@link #size} method which specifies how asegment's size is determined. {@link LogDocMergePolicy}is one subclass that measures size by document count in the segment. {@link LogByteSizeMergePolicy} is anothersubclass that measures size as the total byte size of the file(s) for the segment.

Examples of org.apache.lucene.index.LogMergePolicy

    
    IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random())).setMergeScheduler(new MyMergeScheduler())
        .setMaxBufferedDocs(2).setRAMBufferSizeMB(IndexWriterConfig.DISABLE_AUTO_FLUSH)
        .setMergePolicy(newLogMergePolicy()));
    LogMergePolicy logMP = (LogMergePolicy) writer.getConfig().getMergePolicy();
    logMP.setMergeFactor(10);
    for(int i=0;i<20;i++)
      writer.addDocument(doc);


    ((MyMergeScheduler) writer.getConfig().getMergeScheduler()).sync();
    writer.close();

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Examples of org.apache.lucene.index.LogMergePolicy

    
    DirectoryTaxonomyWriter writer = new DirectoryTaxonomyWriter(dir) {
      @Override
      protected IndexWriterConfig createIndexWriterConfig(OpenMode openMode) {
        IndexWriterConfig conf = super.createIndexWriterConfig(openMode);
        LogMergePolicy lmp = (LogMergePolicy) conf.getMergePolicy();
        lmp.setMergeFactor(2);
        return conf;
      }
    };
    TaxonomyReader reader = new DirectoryTaxonomyReader(writer);

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Examples of org.apache.lucene.index.LogMergePolicy

   public static IndexWriter openWriter(Directory directory, int maxMergeDocs, boolean useSerialMerger) throws IOException {
      IndexWriterConfig indexWriterConfig = new IndexWriterConfig(LUCENE_VERSION, analyzer);
      if (useSerialMerger) {
         indexWriterConfig.setMergeScheduler(mergeScheduler);
      }
      LogMergePolicy mergePolicy = new LogByteSizeMergePolicy();
      mergePolicy.setMaxMergeDocs(maxMergeDocs);
      indexWriterConfig.setMergePolicy(mergePolicy);
      return new IndexWriter(directory, indexWriterConfig);
   }

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Examples of org.apache.lucene.index.LogMergePolicy

   public static IndexWriter openWriter(Directory directory, int maxMergeDocs, boolean useSerialMerger) throws CorruptIndexException, LockObtainFailedException, IOException {
      IndexWriterConfig indexWriterConfig = new IndexWriterConfig(LUCENE_VERSION, analyzer);
      if (useSerialMerger) {
         indexWriterConfig.setMergeScheduler(mergeScheduler);
      }
      LogMergePolicy mergePolicy = new LogByteSizeMergePolicy();
      mergePolicy.setMaxMergeDocs(maxMergeDocs);
      mergePolicy.setUseCompoundFile(false);
      indexWriterConfig.setMergePolicy(mergePolicy);
      return new IndexWriter(directory, indexWriterConfig);
   }

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Examples of org.apache.lucene.index.LogMergePolicy

      } catch (Exception e) {
        throw new RuntimeException("unable to instantiate class '" + mergePolicy + "' as merge policy", e);
      }
      iwConf.getMergePolicy().setNoCFSRatio(isCompound ? 1.0 : 0.0);
      if(iwConf.getMergePolicy() instanceof LogMergePolicy) {
        LogMergePolicy logMergePolicy = (LogMergePolicy) iwConf.getMergePolicy();
        logMergePolicy.setMergeFactor(config.get("merge.factor",OpenIndexTask.DEFAULT_MERGE_PFACTOR));
      }
    }
    final double ramBuffer = config.get("ram.flush.mb",OpenIndexTask.DEFAULT_RAM_FLUSH_MB);
    final int maxBuffered = config.get("max.buffered",OpenIndexTask.DEFAULT_MAX_BUFFERED);
    if (maxBuffered == IndexWriterConfig.DISABLE_AUTO_FLUSH) {

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Examples of org.apache.lucene.index.LogMergePolicy

    NUMBER_OF_FIELDS = atLeast(Math.max(10, 3*termIndexInterval*indexDivisor/NUMBER_OF_DOCUMENTS));
    
    directory = newDirectory();


    config.setCodec(new PreFlexRWCodec());
    LogMergePolicy mp = newLogMergePolicy();
    // NOTE: turn off compound file, this test will open some index files directly.
    mp.setNoCFSRatio(0.0);
    config.setMergePolicy(mp);


    
    populate(directory, config);

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Examples of org.apache.lucene.index.LogMergePolicy

   * count lowish */
  public static void reduceOpenFiles(IndexWriter w) {
    // keep number of open files lowish
    MergePolicy mp = w.getConfig().getMergePolicy();
    if (mp instanceof LogMergePolicy) {
      LogMergePolicy lmp = (LogMergePolicy) mp;
      lmp.setMergeFactor(Math.min(5, lmp.getMergeFactor()));
      lmp.setNoCFSRatio(1.0);
    } else if (mp instanceof TieredMergePolicy) {
      TieredMergePolicy tmp = (TieredMergePolicy) mp;
      tmp.setMaxMergeAtOnce(Math.min(5, tmp.getMaxMergeAtOnce()));
      tmp.setSegmentsPerTier(Math.min(5, tmp.getSegmentsPerTier()));
      tmp.setNoCFSRatio(1.0);

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Examples of org.apache.lucene.index.LogMergePolicy

    
    DirectoryTaxonomyWriter writer = new DirectoryTaxonomyWriter(dir) {
      @Override
      protected IndexWriterConfig createIndexWriterConfig(OpenMode openMode) {
        IndexWriterConfig conf = super.createIndexWriterConfig(openMode);
        LogMergePolicy lmp = (LogMergePolicy) conf.getMergePolicy();
        lmp.setMergeFactor(2);
        return conf;
      }
    };
    TaxonomyReader reader = new DirectoryTaxonomyReader(writer);

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Examples of org.apache.lucene.index.LogMergePolicy

  public static TieredMergePolicy newTieredMergePolicy() {
    return newTieredMergePolicy(random);
  }


  public static LogMergePolicy newLogMergePolicy(Random r) {
    LogMergePolicy logmp = r.nextBoolean() ? new LogDocMergePolicy() : new LogByteSizeMergePolicy();
    logmp.setUseCompoundFile(r.nextBoolean());
    logmp.setCalibrateSizeByDeletes(r.nextBoolean());
    if (r.nextInt(3) == 2) {
      logmp.setMergeFactor(2);
    } else {
      logmp.setMergeFactor(_TestUtil.nextInt(r, 2, 20));
    }
    return logmp;
  }

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Examples of org.apache.lucene.index.LogMergePolicy

    tmp.setNoCFSRatio(0.1 + r.nextDouble()*0.8);
    return tmp;
  }


  public static LogMergePolicy newLogMergePolicy(boolean useCFS) {
    LogMergePolicy logmp = newLogMergePolicy();
    logmp.setUseCompoundFile(useCFS);
    return logmp;
  }

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