本文整理汇总了Java中org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY属性的典型用法代码示例。如果您正苦于以下问题：Java DFSConfigKeys.DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY属性的具体用法？Java DFSConfigKeys.DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY怎么用？Java DFSConfigKeys.DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类org.apache.hadoop.hdfs.DFSConfigKeys的用法示例。
在下文中一共展示了DFSConfigKeys.DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY属性的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getNewBlockTargets
/**
* Part I of getAdditionalBlock().
* Analyze the state of the file under read lock to determine if the client
* can add a new block, detect potential retries, lease mismatches,
* and minimal replication of the penultimate block.
*
* Generate target DataNode locations for the new block,
* but do not create the new block yet.
*/
DatanodeStorageInfo[] getNewBlockTargets(String src, long fileId,
String clientName, ExtendedBlock previous, Set<Node> excludedNodes,
List<String> favoredNodes, LocatedBlock[] onRetryBlock) throws IOException {
final long blockSize;
final int replication;
final byte storagePolicyID;
Node clientNode = null;
String clientMachine = null;
NameNode.stateChangeLog.debug("BLOCK* getAdditionalBlock: {} inodeId {}" +
" for {}", src, fileId, clientName);
checkOperation(OperationCategory.READ);
byte[][] pathComponents = FSDirectory.getPathComponentsForReservedPath(src);
FSPermissionChecker pc = getPermissionChecker();
readLock();
try {
checkOperation(OperationCategory.READ);
src = dir.resolvePath(pc, src, pathComponents);
FileState fileState = analyzeFileState(
src, fileId, clientName, previous, onRetryBlock);
final INodeFile pendingFile = fileState.inode;
// Check if the penultimate block is minimally replicated
if (!checkFileProgress(src, pendingFile, false)) {
throw new NotReplicatedYetException("Not replicated yet: " + src);
}
src = fileState.path;
if (onRetryBlock[0] != null && onRetryBlock[0].getLocations().length > 0) {
// This is a retry. No need to generate new locations.
// Use the last block if it has locations.
return null;
}
if (pendingFile.getBlocks().length >= maxBlocksPerFile) {
throw new IOException("File has reached the limit on maximum number of"
+ " blocks (" + DFSConfigKeys.DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY
+ "): " + pendingFile.getBlocks().length + " >= "
+ maxBlocksPerFile);
}
blockSize = pendingFile.getPreferredBlockSize();
clientMachine = pendingFile.getFileUnderConstructionFeature()
.getClientMachine();
clientNode = blockManager.getDatanodeManager().getDatanodeByHost(
clientMachine);
replication = pendingFile.getFileReplication();
storagePolicyID = pendingFile.getStoragePolicyID();
} finally {
readUnlock();
}
if (clientNode == null) {
clientNode = getClientNode(clientMachine);
}
// choose targets for the new block to be allocated.
return getBlockManager().chooseTarget4NewBlock(
src, replication, clientNode, excludedNodes, blockSize, favoredNodes,
storagePolicyID);
}