bp-929597290-192.0.0.2-1439573305237
这是块池id。块池是属于单个名称空间的一组块。为简单起见，可以说名称节点管理的所有块都在同一块池下。
区块池的形式如下：

String bpid = "BP-" + rand + "-"+ ip + "-" + Time.now();        

Where: 
rand = Some random number
ip = IP address of the Name Node
Time.now() - Current system time

请在此处阅读有关块池的信息：https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/federation.html
邮编：1074084574
块的块号。hdfs中的每个块都有一个唯一的标识符。
块id形成为：

blk_<blockid>_<genstamp> 

Where: 
blockid = ID of the block
genstamp = an incrementing integer that records the version of a particular block

请在此处阅读有关generation stamp的信息：http://blog.cloudera.com/blog/2009/07/file-appends-in-hdfs/
长度=2
块的长度：块中的字节数
复制=3
此块有3个副本
数据节点信息存储[192.0.0.9:1000，ds-730a75d3-046c-4254-990a-4eee9520424f，磁盘
哪里：

192.0.0.9 => IP address of the Data Node holding this block
1000 => Data streaming port
DS-730a75d3-046c-4254-990a-4eee9520424f => Storage ID. It is an internal ID of the Data Node. It is assigned, when the Data Node registers with Name Node
DISK => storageType. It is DISK here. Storage type can be: RAM_DISK, SSD, DISK and ARCHIVE

第5点的描述适用于剩余的2个区块：

DatanodeInfoWithStorage[192.0.0.1:1000,DS-fc6ee5c7-e76b-4faa-b663-58a60240de4c,DISK], 
DatanodeInfoWithStorage[192.0.0.3:1000,DS-8ab81b26-309e-42d6-ae14-26eb88387cad,DISK]]