类 org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockWriteStreams
的使用

使用FSDatasetInterface.BlockWriteStreams的程序包

程序包	说明
org.apache.hadoop.hdfs.server.datanode

org.apache.hadoop.hdfs.server.datanode中FSDatasetInterface.BlockWriteStreams的使用

返回FSDatasetInterface.BlockWriteStreams的org.apache.hadoop.hdfs.server.datanode中的方法

限定符和类型	方法和说明
FSDatasetInterface.BlockWriteStreams	FSDatasetInterface.writeToBlock(Block b, boolean isRecovery, boolean isReplicationRequest) Creates the block and returns output streams to write data and CRC
FSDatasetInterface.BlockWriteStreams	FSDataset.writeToBlock(Block b, boolean isRecovery, boolean replicationRequest) Start writing to a block file If isRecovery is true and the block pre-exists, then we kill all volumeMap.put(b, v); volumeMap.put(b, v); other threads that might be writing to this block, and then reopen the file.

参数类型为FSDatasetInterface.BlockWriteStreams的org.apache.hadoop.hdfs.server.datanode中的方法

限定符和类型	方法和说明
long	FSDatasetInterface.getChannelPosition(Block b, FSDatasetInterface.BlockWriteStreams stream) Returns the current offset in the data stream.
long	FSDataset.getChannelPosition(Block b, FSDatasetInterface.BlockWriteStreams streams) Retrieves the offset in the block to which the the next write will write data to.
void	FSDatasetInterface.setChannelPosition(Block b, FSDatasetInterface.BlockWriteStreams stream, long dataOffset, long ckOffset) Sets the file pointer of the data stream and checksum stream to the specified values.
void	FSDataset.setChannelPosition(Block b, FSDatasetInterface.BlockWriteStreams streams, long dataOffset, long ckOffset) Sets the offset in the block to which the the next write will write data to.