定时执行脚本

#!/bin/bash
source /etc/profile
sh ./hbase shell <<EOF
major_compact 'table_name'
EOF

major_compact 语法：

hbase(main):024:0> help 'major_compact'
          Run major compaction on passed table or pass a region row
          to major compact an individual region. To compact a single
          column family within a region specify the region name
          followed by the column family name.
          Examples:
          Compact all regions in a table:
          hbase> major_compact 't1'
          hbase> major_compact 'ns1:t1'
          Compact an entire region:
          hbase> major_compact 'r1'
          Compact a single column family within a region:
          hbase> major_compact 'r1', 'c1'
          Compact a single column family within a table:
          hbase> major_compact 't1', 'c1'
          Compact table with type "MOB"
          hbase> major_compact 't1', nil, 'MOB'
          Compact a column family using "MOB" type within a table
          hbase> major_compact 't1', 'c1', 'MOB'

major_compact 最好禁用自动major_compact ，而是手动major_compact 。时间选择在业务低峰期执行。
而且避免影响业务要进行限速限并发等操作，因为major_compact 会消耗较多的IO和磁盘。具体是如何配置后续再继续研究