Examples of org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface

Package org.apache.hadoop.hdfs.server.datanode

Examples of org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface

org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface
This is an interface for the underlying storage that stores blocks for a data node. Examples are the FSDataset (which stores blocks on dirs) and SimulatedFSDataset (which simulates data).

    }
    
  }
  
  public void testInValidBlocks() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    Block b = new Block(1, 5, 0);
    checkInvalidBlock(b);
    
    // Now check invlaid after adding some blocks
    addSomeBlocks(fsdataset);

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    checkInvalidBlock(b);
    
  }


  public void testInvalidate() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    int bytesAdded = addSomeBlocks(fsdataset);
    Block[] deleteBlocks = new Block[2];
    deleteBlocks[0] = new Block(1, 0, 0);
    deleteBlocks[1] = new Block(2, 0, 0);
    fsdataset.invalidate(0,deleteBlocks);
    checkInvalidBlock(deleteBlocks[0]);
    checkInvalidBlock(deleteBlocks[1]);
    long sizeDeleted = blockIdToLen(1) + blockIdToLen(2);
    assertEquals(bytesAdded-sizeDeleted, fsdataset.getDfsUsed());
    assertEquals(fsdataset.getCapacity()-bytesAdded+sizeDeleted,  fsdataset.getRemaining());
    
    
    
    // Now make sure the rest of the blocks are valid
    for (int i=3; i <= NUMBLOCKS; ++i) {
      Block b = new Block(i, 0, 0);
      assertTrue(fsdataset.isValidBlock(0, b, false));
    }
  }

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   */
  public void injectBlocks(int dataNodeIndex, Iterable<Block> blocksToInject) throws IOException {
    if (dataNodeIndex < 0 || dataNodeIndex > dataNodes.size()) {
      throw new IndexOutOfBoundsException();
    }
    FSDatasetInterface dataSet = dataNodes.get(dataNodeIndex).datanode.getFSDataset();
    if (!(dataSet instanceof SimulatedFSDataset)) {
      throw new IOException("injectBlocks is valid only for SimilatedFSDataset");
    }
    String bpid = getNamesystem().getBlockPoolId();
    SimulatedFSDataset sdataset = (SimulatedFSDataset) dataSet;

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  public void injectBlocks(int nameNodeIndex, int dataNodeIndex,
      Iterable<Block> blocksToInject) throws IOException {
    if (dataNodeIndex < 0 || dataNodeIndex > dataNodes.size()) {
      throw new IndexOutOfBoundsException();
    }
    FSDatasetInterface dataSet = dataNodes.get(dataNodeIndex).datanode.getFSDataset();
    if (!(dataSet instanceof SimulatedFSDataset)) {
      throw new IOException("injectBlocks is valid only for SimilatedFSDataset");
    }
    String bpid = getNamesystem(nameNodeIndex).getBlockPoolId();
    SimulatedFSDataset sdataset = (SimulatedFSDataset) dataSet;

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   */
  public void injectBlocks(int dataNodeIndex, Block[] blocksToInject) throws IOException {
    if (dataNodeIndex < 0 || dataNodeIndex > dataNodes.size()) {
      throw new IndexOutOfBoundsException();
    }
    FSDatasetInterface dataSet = dataNodes.get(dataNodeIndex).datanode.getFSDataset();
    if (!(dataSet instanceof SimulatedFSDataset)) {
      throw new IOException("injectBlocks is valid only for SimilatedFSDataset");
    }
    SimulatedFSDataset sdataset = (SimulatedFSDataset) dataSet;
    sdataset.injectBlocks(getNameNode().getNamespaceID(), blocksToInject);

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    }
    
  }
  
  public void testInValidBlocks() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    Block b = new Block(1, 5, 0);
    checkInvalidBlock(b);
    
    // Now check invlaid after adding some blocks
    addSomeBlocks(fsdataset);

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    checkInvalidBlock(b);
    
  }


  public void testInvalidate() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    int bytesAdded = addSomeBlocks(fsdataset);
    Block[] deleteBlocks = new Block[2];
    deleteBlocks[0] = new Block(1, 0, 0);
    deleteBlocks[1] = new Block(2, 0, 0);
    fsdataset.invalidate(0,deleteBlocks);
    checkInvalidBlock(deleteBlocks[0]);
    checkInvalidBlock(deleteBlocks[1]);
    long sizeDeleted = blockIdToLen(1) + blockIdToLen(2);
    assertEquals(bytesAdded-sizeDeleted, fsdataset.getDfsUsed());
    assertEquals(fsdataset.getCapacity()-bytesAdded+sizeDeleted,  fsdataset.getRemaining());
    
    
    
    // Now make sure the rest of the blocks are valid
    for (int i=3; i <= NUMBLOCKS; ++i) {
      Block b = new Block(i, 0, 0);
      assertTrue(fsdataset.isValidBlock(0, b, false));
    }
  }

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  int addSomeBlocks(FSDatasetInterface fsdataset ) throws IOException {
    return addSomeBlocks(fsdataset, 1);
  }


  public void testStorageUsage() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    assertEquals(fsdataset.getDfsUsed(), 0);
    assertEquals(fsdataset.getRemaining(), fsdataset.getCapacity());
    int bytesAdded = addSomeBlocks(fsdataset);
    assertEquals(bytesAdded, fsdataset.getDfsUsed());
    assertEquals(fsdataset.getCapacity()-bytesAdded,  fsdataset.getRemaining());
    
  }

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    }
    assertEquals(expectedLen, lengthRead);
  }
  
  public void testWriteRead() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    addSomeBlocks(fsdataset);
    for (int i=1; i <= NUMBLOCKS; ++i) {
      Block b = new Block(i, 0, 0);
      assertTrue(fsdataset.isValidBlock(0, b, false));
      assertEquals(blockIdToLen(i), fsdataset.getFinalizedBlockLength(0,b));
      checkBlockDataAndSize(fsdataset, b, blockIdToLen(i));
    }
  }

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  }






  public void testGetBlockReport() throws IOException {
    FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); 
    Block[] blockReport = fsdataset.getBlockReport(0);
    assertEquals(0, blockReport.length);
    int bytesAdded = addSomeBlocks(fsdataset);
    blockReport = fsdataset.getBlockReport(0);
    assertEquals(NUMBLOCKS, blockReport.length);
    for (Block b: blockReport) {
      assertNotNull(b);
      assertEquals(blockIdToLen(b.getBlockId()), b.getNumBytes());
    }

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Related Classes of org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface

org.apache.hadoop.hdfs.MiniDFSCluster

org.apache.hadoop.hdfs.server.datanode.TestSimulatedFSDataset

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