Java Code Examples for org.apache.hadoop.fs.VolumeId

The following examples show how to use org.apache.hadoop.fs.VolumeId. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: hadoop   Source File: BlockStorageLocationUtil.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Helper method to combine a list of {@link LocatedBlock} with associated
 * {@link VolumeId} information to form a list of {@link BlockStorageLocation}
 * .
 */
static BlockStorageLocation[] convertToVolumeBlockLocations(
    List<LocatedBlock> blocks, 
    Map<LocatedBlock, List<VolumeId>> blockVolumeIds) throws IOException {
  // Construct the final return value of VolumeBlockLocation[]
  BlockLocation[] locations = DFSUtil.locatedBlocks2Locations(blocks);
  List<BlockStorageLocation> volumeBlockLocs = 
      new ArrayList<BlockStorageLocation>(locations.length);
  for (int i = 0; i < locations.length; i++) {
    LocatedBlock locBlock = blocks.get(i);
    List<VolumeId> volumeIds = blockVolumeIds.get(locBlock);
    BlockStorageLocation bsLoc = new BlockStorageLocation(locations[i], 
        volumeIds.toArray(new VolumeId[0]));
    volumeBlockLocs.add(bsLoc);
  }
  return volumeBlockLocs.toArray(new BlockStorageLocation[] {});
}
 
Example 2
/**
 * Returns a disk id (0-based) index from the Hdfs VolumeId object. There is
 * currently no public API to get at the volume id. We'll have to get it by
 * accessing the internals.
 */
public static int getDiskId(VolumeId hdfsVolumeId){
	// Initialize the diskId as -1 to indicate it is unknown
	int diskId = -1;

	if (hdfsVolumeId != null) {
		String volumeIdString = hdfsVolumeId.toString();

		byte[] volumeIdBytes = StringUtils.hexStringToByte(volumeIdString);
		if (volumeIdBytes != null && volumeIdBytes.length == 4) {
			diskId = Utils.toInt(volumeIdBytes);
		}else if (volumeIdBytes.length == 1) {
			diskId = (int) volumeIdBytes[0];  // support hadoop-2.0.2
        }
	}

	return diskId;
}
 
Example 3
Source Project: big-c   Source File: BlockStorageLocationUtil.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Helper method to combine a list of {@link LocatedBlock} with associated
 * {@link VolumeId} information to form a list of {@link BlockStorageLocation}
 * .
 */
static BlockStorageLocation[] convertToVolumeBlockLocations(
    List<LocatedBlock> blocks, 
    Map<LocatedBlock, List<VolumeId>> blockVolumeIds) throws IOException {
  // Construct the final return value of VolumeBlockLocation[]
  BlockLocation[] locations = DFSUtil.locatedBlocks2Locations(blocks);
  List<BlockStorageLocation> volumeBlockLocs = 
      new ArrayList<BlockStorageLocation>(locations.length);
  for (int i = 0; i < locations.length; i++) {
    LocatedBlock locBlock = blocks.get(i);
    List<VolumeId> volumeIds = blockVolumeIds.get(locBlock);
    BlockStorageLocation bsLoc = new BlockStorageLocation(locations[i], 
        volumeIds.toArray(new VolumeId[0]));
    volumeBlockLocs.add(bsLoc);
  }
  return volumeBlockLocs.toArray(new BlockStorageLocation[] {});
}
 
Example 4
Source Project: hdfs-metadata   Source File: Main.java    License: GNU General Public License v3.0 5 votes vote down vote up
private void printBlockMetadata(BlockLocation blockLocation, String[] dataDirs) throws IOException {

		System.out.println("	Offset: " + blockLocation.getOffset());
		System.out.println("	Length: " + blockLocation.getLength());

		String[] cachedHosts = blockLocation.getCachedHosts();
		if (cachedHosts.length == 0) {
			System.out.println("	No cached hosts");
		}

		System.out.println("	Replicas:");
		VolumeId[] volumeIds = blockLocation instanceof BlockStorageLocation ?
				(((BlockStorageLocation) blockLocation).getVolumeIds()) : null;
		String[] hosts = blockLocation.getHosts();
		String[] names = blockLocation.getNames();
		String[] topologyPaths = blockLocation.getTopologyPaths();
		for (int i = 0; i < topologyPaths.length; i++) {
			int diskId = volumeIds != null ? DistributedFileSystemMetadata.getDiskId(volumeIds[i]) : -1;
			
			System.out.println("		Replica (" + i + "):");
			System.out.println("			Host: " + hosts[i]);
			
			if(diskId == -1)
				System.out.println("			DiskId: unknown");
			else if(dataDirs != null && diskId < dataDirs.length)
				System.out.println("			Location: " + dataDirs[diskId] + " (DiskId: " + diskId + ")");
			else
				System.out.println("			DiskId: " + diskId);
			
			System.out.println("			Name: " + names[i]);
			System.out.println("			TopologyPaths: " + topologyPaths[i]);
		}

		if (cachedHosts.length > 0) {
			System.out.println("	Cached hosts:");
			for (String cachedHost : cachedHosts) {
				System.out.println("		Host: " + cachedHost);
			}
		}
	}
 
Example 5
@Test
public void computeHostsDiskIdsCount() throws IOException{
	List<BlockLocation> blockStorageLocations = new LinkedList<>();
	blockStorageLocations.add(new BlockStorageLocation(
			new BlockLocation(null, new String[]{"host1", "host2"}, 0, 0), 
			new VolumeId[]{new TVolumeId("3"), new TVolumeId("4")}));
	blockStorageLocations.add(new BlockStorageLocation(
			new BlockLocation(null, new String[]{"host2", "host3"}, 0, 0), 
			new VolumeId[]{new TVolumeId("4"), new TVolumeId("5")}));
	blockStorageLocations.add(new BlockStorageLocation(
			new BlockLocation(null, new String[]{"host10", "host2"}, 0, 0), 
			new VolumeId[]{new TVolumeId("3"), new TVolumeId("4")}));
	blockStorageLocations.add(new BlockStorageLocation(
			new BlockLocation(null, new String[]{"host10", "host3"}, 0, 0), 
			new VolumeId[]{new TVolumeId("8"), new TVolumeId("5")}));
	blockStorageLocations.add(new BlockLocation(null, new String[]{"host10", "host3", "host3"}, 0, 0));
			
	HashMap<String, HashMap<Integer, Integer>> hosts_diskids = 
			DistributedFileSystemMetadata.computeHostsDiskIdsCount(blockStorageLocations);
	
	Assert.assertEquals(1, hosts_diskids.get("host1").get(3).intValue());
	Assert.assertEquals(3, hosts_diskids.get("host2").get(4).intValue());
	Assert.assertEquals(2, hosts_diskids.get("host3").get(5).intValue());
	Assert.assertEquals(2, hosts_diskids.get("host3").get(-1).intValue());
	Assert.assertEquals(1, hosts_diskids.get("host10").get(3).intValue());
	Assert.assertEquals(1, hosts_diskids.get("host10").get(8).intValue());
	Assert.assertEquals(1, hosts_diskids.get("host10").get(-1).intValue());
}
 
Example 6
Source Project: hadoop   Source File: DFSClient.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Get block location information about a list of {@link HdfsBlockLocation}.
 * Used by {@link DistributedFileSystem#getFileBlockStorageLocations(List)} to
 * get {@link BlockStorageLocation}s for blocks returned by
 * {@link DistributedFileSystem#getFileBlockLocations(org.apache.hadoop.fs.FileStatus, long, long)}
 * .
 * 
 * This is done by making a round of RPCs to the associated datanodes, asking
 * the volume of each block replica. The returned array of
 * {@link BlockStorageLocation} expose this information as a
 * {@link VolumeId}.
 * 
 * @param blockLocations
 *          target blocks on which to query volume location information
 * @return volumeBlockLocations original block array augmented with additional
 *         volume location information for each replica.
 */
public BlockStorageLocation[] getBlockStorageLocations(
    List<BlockLocation> blockLocations) throws IOException,
    UnsupportedOperationException, InvalidBlockTokenException {
  if (!getConf().getHdfsBlocksMetadataEnabled) {
    throw new UnsupportedOperationException("Datanode-side support for " +
        "getVolumeBlockLocations() must also be enabled in the client " +
        "configuration.");
  }
  // Downcast blockLocations and fetch out required LocatedBlock(s)
  List<LocatedBlock> blocks = new ArrayList<LocatedBlock>();
  for (BlockLocation loc : blockLocations) {
    if (!(loc instanceof HdfsBlockLocation)) {
      throw new ClassCastException("DFSClient#getVolumeBlockLocations " +
          "expected to be passed HdfsBlockLocations");
    }
    HdfsBlockLocation hdfsLoc = (HdfsBlockLocation) loc;
    blocks.add(hdfsLoc.getLocatedBlock());
  }
  
  // Re-group the LocatedBlocks to be grouped by datanodes, with the values
  // a list of the LocatedBlocks on the datanode.
  Map<DatanodeInfo, List<LocatedBlock>> datanodeBlocks = 
      new LinkedHashMap<DatanodeInfo, List<LocatedBlock>>();
  for (LocatedBlock b : blocks) {
    for (DatanodeInfo info : b.getLocations()) {
      if (!datanodeBlocks.containsKey(info)) {
        datanodeBlocks.put(info, new ArrayList<LocatedBlock>());
      }
      List<LocatedBlock> l = datanodeBlocks.get(info);
      l.add(b);
    }
  }
      
  // Make RPCs to the datanodes to get volume locations for its replicas
  TraceScope scope =
    Trace.startSpan("getBlockStorageLocations", traceSampler);
  Map<DatanodeInfo, HdfsBlocksMetadata> metadatas;
  try {
    metadatas = BlockStorageLocationUtil.
        queryDatanodesForHdfsBlocksMetadata(conf, datanodeBlocks,
            getConf().getFileBlockStorageLocationsNumThreads,
            getConf().getFileBlockStorageLocationsTimeoutMs,
            getConf().connectToDnViaHostname);
    if (LOG.isTraceEnabled()) {
      LOG.trace("metadata returned: "
          + Joiner.on("\n").withKeyValueSeparator("=").join(metadatas));
    }
  } finally {
    scope.close();
  }
  
  // Regroup the returned VolumeId metadata to again be grouped by
  // LocatedBlock rather than by datanode
  Map<LocatedBlock, List<VolumeId>> blockVolumeIds = BlockStorageLocationUtil
      .associateVolumeIdsWithBlocks(blocks, metadatas);
  
  // Combine original BlockLocations with new VolumeId information
  BlockStorageLocation[] volumeBlockLocations = BlockStorageLocationUtil
      .convertToVolumeBlockLocations(blocks, blockVolumeIds);

  return volumeBlockLocations;
}
 
Example 7
@Override
public int compareTo(VolumeId arg0) {
	return 0;
}
 
Example 8
Source Project: big-c   Source File: DFSClient.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Get block location information about a list of {@link HdfsBlockLocation}.
 * Used by {@link DistributedFileSystem#getFileBlockStorageLocations(List)} to
 * get {@link BlockStorageLocation}s for blocks returned by
 * {@link DistributedFileSystem#getFileBlockLocations(org.apache.hadoop.fs.FileStatus, long, long)}
 * .
 * 
 * This is done by making a round of RPCs to the associated datanodes, asking
 * the volume of each block replica. The returned array of
 * {@link BlockStorageLocation} expose this information as a
 * {@link VolumeId}.
 * 
 * @param blockLocations
 *          target blocks on which to query volume location information
 * @return volumeBlockLocations original block array augmented with additional
 *         volume location information for each replica.
 */
public BlockStorageLocation[] getBlockStorageLocations(
    List<BlockLocation> blockLocations) throws IOException,
    UnsupportedOperationException, InvalidBlockTokenException {
  if (!getConf().getHdfsBlocksMetadataEnabled) {
    throw new UnsupportedOperationException("Datanode-side support for " +
        "getVolumeBlockLocations() must also be enabled in the client " +
        "configuration.");
  }
  // Downcast blockLocations and fetch out required LocatedBlock(s)
  List<LocatedBlock> blocks = new ArrayList<LocatedBlock>();
  for (BlockLocation loc : blockLocations) {
    if (!(loc instanceof HdfsBlockLocation)) {
      throw new ClassCastException("DFSClient#getVolumeBlockLocations " +
          "expected to be passed HdfsBlockLocations");
    }
    HdfsBlockLocation hdfsLoc = (HdfsBlockLocation) loc;
    blocks.add(hdfsLoc.getLocatedBlock());
  }
  
  // Re-group the LocatedBlocks to be grouped by datanodes, with the values
  // a list of the LocatedBlocks on the datanode.
  Map<DatanodeInfo, List<LocatedBlock>> datanodeBlocks = 
      new LinkedHashMap<DatanodeInfo, List<LocatedBlock>>();
  for (LocatedBlock b : blocks) {
    for (DatanodeInfo info : b.getLocations()) {
      if (!datanodeBlocks.containsKey(info)) {
        datanodeBlocks.put(info, new ArrayList<LocatedBlock>());
      }
      List<LocatedBlock> l = datanodeBlocks.get(info);
      l.add(b);
    }
  }
      
  // Make RPCs to the datanodes to get volume locations for its replicas
  TraceScope scope =
    Trace.startSpan("getBlockStorageLocations", traceSampler);
  Map<DatanodeInfo, HdfsBlocksMetadata> metadatas;
  try {
    metadatas = BlockStorageLocationUtil.
        queryDatanodesForHdfsBlocksMetadata(conf, datanodeBlocks,
            getConf().getFileBlockStorageLocationsNumThreads,
            getConf().getFileBlockStorageLocationsTimeoutMs,
            getConf().connectToDnViaHostname);
    if (LOG.isTraceEnabled()) {
      LOG.trace("metadata returned: "
          + Joiner.on("\n").withKeyValueSeparator("=").join(metadatas));
    }
  } finally {
    scope.close();
  }
  
  // Regroup the returned VolumeId metadata to again be grouped by
  // LocatedBlock rather than by datanode
  Map<LocatedBlock, List<VolumeId>> blockVolumeIds = BlockStorageLocationUtil
      .associateVolumeIdsWithBlocks(blocks, metadatas);
  
  // Combine original BlockLocations with new VolumeId information
  BlockStorageLocation[] volumeBlockLocations = BlockStorageLocationUtil
      .convertToVolumeBlockLocations(blocks, blockVolumeIds);

  return volumeBlockLocations;
}