Examples of BlockCommand

org.apache.hadoop.dfs.BlockCommand
A BlockCommand is an instruction to a datanode regarding some blocks under its control. It tells the DataNode to either invalidate a set of indicated blocks, or to copy a set of indicated blocks to another DataNode. @author Mike Cafarella
org.apache.hadoop.hdfs.server.protocol.BlockCommand
A BlockCommand is an instruction to a datanode regarding some blocks under its control. It tells the DataNode to either invalidate a set of indicated blocks, or to copy a set of indicated blocks to another DataNode.

Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

     * @throws IOException
     */
  private boolean processCommand(DatanodeCommand cmd) throws IOException {
    if (cmd == null)
      return true;
    final BlockCommand bcmd = cmd instanceof BlockCommand? (BlockCommand)cmd: null;


    switch(cmd.getAction()) {
    case DatanodeProtocol.DNA_TRANSFER:
      // Send a copy of a block to another datanode
      transferBlocks(bcmd.getBlocks(), bcmd.getTargets());
      myMetrics.blocksReplicated.inc(bcmd.getBlocks().length);
      break;
    case DatanodeProtocol.DNA_INVALIDATE:
      //
      // Some local block(s) are obsolete and can be 
      // safely garbage-collected.
      //
      Block toDelete[] = bcmd.getBlocks();
      try {
        if (blockScanner != null) {
          blockScanner.deleteBlocks(toDelete);
        }
        data.invalidate(toDelete);
      } catch(IOException e) {
        checkDiskError();
        throw e;
      }
      myMetrics.blocksRemoved.inc(toDelete.length);
      break;
    case DatanodeProtocol.DNA_SHUTDOWN:
      // shut down the data node
      this.shutdown();
      return false;
    case DatanodeProtocol.DNA_REGISTER:
      // namenode requested a registration - at start or if NN lost contact
      LOG.info("DatanodeCommand action: DNA_REGISTER");
      if (shouldRun) {
        register();
      }
      break;
    case DatanodeProtocol.DNA_FINALIZE:
      storage.finalizeUpgrade();
      break;
    case UpgradeCommand.UC_ACTION_START_UPGRADE:
      // start distributed upgrade here
      processDistributedUpgradeCommand((UpgradeCommand)cmd);
      break;
    case DatanodeProtocol.DNA_RECOVERBLOCK:
      recoverBlocks(bcmd.getBlocks(), bcmd.getTargets());
      break;
    default:
      LOG.warn("Unknown DatanodeCommand action: " + cmd.getAction());
    }
    return true;

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

  }
  
  BlockCommand getReplicationCommand(int maxTransfers) {
    List<BlockTargetPair> blocktargetlist = replicateBlocks.poll(maxTransfers);
    return blocktargetlist == null? null:
        new BlockCommand(DatanodeProtocol.DNA_TRANSFER, blocktargetlist);
  }

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

  }


  BlockCommand getLeaseRecoveryCommand(int maxTransfers) {
    List<BlockTargetPair> blocktargetlist = recoverBlocks.poll(maxTransfers);
    return blocktargetlist == null? null:
        new BlockCommand(DatanodeProtocol.DNA_RECOVERBLOCK, blocktargetlist);
  }

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

   * Remove the specified number of blocks to be invalidated
   */
  BlockCommand getInvalidateBlocks(int maxblocks) {
    Block[] deleteList = getBlockArray(invalidateBlocks, maxblocks); 
    return deleteList == null? 
        null: new BlockCommand(DatanodeProtocol.DNA_INVALIDATE, deleteList);
  }

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

          dnRegistration, DF_CAPACITY, DF_USED, DF_CAPACITY - DF_USED, 0, 0);
      if (cmds != null) {
        for (DatanodeCommand cmd : cmds) {
          if (cmd.getAction() == DatanodeProtocol.DNA_TRANSFER) {
            // Send a copy of a block to another datanode
            BlockCommand bcmd = (BlockCommand)cmd;
            return transferBlocks(bcmd.getBlocks(), bcmd.getTargets());
          }
        }
      }
      return 0;
    }

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

        final List<DatanodeCommand> cmds = new ArrayList<DatanodeCommand>();
        //check pending replication
        List<BlockTargetPair> pendingList = nodeinfo.getReplicationCommand(
              maxTransfers);
        if (pendingList != null) {
          cmds.add(new BlockCommand(DatanodeProtocol.DNA_TRANSFER, blockPoolId,
              pendingList));
        }
        //check block invalidation
        Block[] blks = nodeinfo.getInvalidateBlocks(blockInvalidateLimit);
        if (blks != null) {
          cmds.add(new BlockCommand(DatanodeProtocol.DNA_INVALIDATE,
              blockPoolId, blks));
        }
        
        blockManager.addKeyUpdateCommand(cmds, nodeinfo);

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

        final List<DatanodeCommand> cmds = new ArrayList<DatanodeCommand>();
        //check pending replication
        List<BlockTargetPair> pendingList = nodeinfo.getReplicationCommand(
              maxTransfers);
        if (pendingList != null) {
          cmds.add(new BlockCommand(DatanodeProtocol.DNA_TRANSFER, blockPoolId,
              pendingList));
        }
        //check block invalidation
        Block[] blks = nodeinfo.getInvalidateBlocks(blockInvalidateLimit);
        if (blks != null) {
          cmds.add(new BlockCommand(DatanodeProtocol.DNA_INVALIDATE,
              blockPoolId, blks));
        }
        
        blockManager.addKeyUpdateCommand(cmds, nodeinfo);

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

   */
  private boolean processCommandFromActive(DatanodeCommand cmd,
      BPServiceActor actor) throws IOException {
    if (cmd == null)
      return true;
    final BlockCommand bcmd = 
      cmd instanceof BlockCommand? (BlockCommand)cmd: null;


    switch(cmd.getAction()) {
    case DatanodeProtocol.DNA_TRANSFER:
      // Send a copy of a block to another datanode
      dn.transferBlocks(bcmd.getBlockPoolId(), bcmd.getBlocks(), bcmd.getTargets());
      dn.metrics.incrBlocksReplicated(bcmd.getBlocks().length);
      break;
    case DatanodeProtocol.DNA_INVALIDATE:
      //
      // Some local block(s) are obsolete and can be 
      // safely garbage-collected.
      //
      Block toDelete[] = bcmd.getBlocks();
      try {
        if (dn.blockScanner != null) {
          dn.blockScanner.deleteBlocks(bcmd.getBlockPoolId(), toDelete);
        }
        // using global fsdataset
        dn.getFSDataset().invalidate(bcmd.getBlockPoolId(), toDelete);
      } catch(IOException e) {
        // Exceptions caught here are not expected to be disk-related.
        throw e;
      }
      dn.metrics.incrBlocksRemoved(toDelete.length);

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

  public void testIgnoreDeletionsFromNonActive() throws Exception {
    BPOfferService bpos = setupBPOSForNNs(mockNN1, mockNN2);


    // Ask to invalidate FAKE_BLOCK when block report hits the
    // standby
    Mockito.doReturn(new BlockCommand(DatanodeProtocol.DNA_INVALIDATE,
        FAKE_BPID, new Block[] { FAKE_BLOCK.getLocalBlock() }))
        .when(mockNN2).blockReport(
            Mockito.<DatanodeRegistration>anyObject(),  
            Mockito.eq(FAKE_BPID),
            Mockito.<StorageBlockReport[]>anyObject());

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Examples of org.apache.hadoop.hdfs.server.protocol.BlockCommand

      break;
    case SHUTDOWN:
      action = DatanodeProtocol.DNA_SHUTDOWN;
      break;
    }
    return new BlockCommand(action, blkCmd.getBlockPoolId(), blocks, targets);
  }

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