hbase meta表数据存储

1.meta表存储了在系统上的一系列的region信息。以及meta表的信息存储在zookeeper上。

2.meta表结构如下（默认列族为info） ：

Key：Region key of the format ([table表名],[region start key起始键],[region id])Values：序列化的regioninfo实例info:regioninfo (serialized HRegionInfo instance for this region)包含此region的regionserverinfo:server (server:port of the RegionServer containing this region)包含此region的regionserver的进程开始时间info:serverstartcode (start-time of the RegionServer process containing this region)

3.meta表实例数据展示：

hbase(main):148:0> scan 'hbase:meta'ROW  COLUMN+CELL  hbase:namespace,,1512106581988.18a0600b197d7313 column=info:regioninfo, timestamp=1512106686993, value={ENCODED => 18a0600b197d73133f8cdeeca1d9bbe2, NAME => 'hbase:namespace,,1512106581988 3f8cdeeca1d9bbe2.   .18a0600b197d73133f8cdeeca1d9bbe2.', STARTKEY => '', ENDKEY => ''}   hbase:namespace,,1512106581988.18a0600b197d7313 column=info:seqnumDuringOpen, timestamp=1512106686993, value=\x00\x00\x00\x00\x00\x00\x00\x0B    3f8cdeeca1d9bbe2.    hbase:namespace,,1512106581988.18a0600b197d7313 column=info:server, timestamp=1512106686993, value=slave-1:16020 3f8cdeeca1d9bbe2.    hbase:namespace,,1512106581988.18a0600b197d7313 column=info:serverstartcode, timestamp=1512106686993, value=1512106679061    3f8cdeeca1d9bbe2.