类 org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy
的使用

使用BlockPlacementPolicy的程序包

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

org.apache.hadoop.hdfs.server.namenode中BlockPlacementPolicy的使用

org.apache.hadoop.hdfs.server.namenode中BlockPlacementPolicy的子类

限定符和类型	类和说明
class	BlockPlacementPolicyDefault The class is responsible for choosing the desired number of targets for placing block replicas.
class	BlockPlacementPolicyWithNodeGroup The class is responsible for choosing the desired number of targets for placing block replicas on environment with node-group layer.

返回BlockPlacementPolicy的org.apache.hadoop.hdfs.server.namenode中的方法

限定符和类型	方法和说明
static BlockPlacementPolicy	BlockPlacementPolicy.getInstance(Configuration conf, FSClusterStats stats, NetworkTopology clusterMap) Get an instance of the configured Block Placement Policy based on the value of the configuration paramater dfs.block.replicator.classname.