Hbase 使用方法

HBase 0.20 + Hadoop 0.20

列出所有 table

hbase(main):>	list

新增 table

1. 直接增加一個表 t1

hbase(main):>	create ‘t1’

2. 增加一個擁有 ’f1’,’f2’,’fn’ 為 column family 的表: t2

hbase(main):>	create ‘t2’,’f1’,’f2’,’fn’   

加入cell-value

需先擁有表 t1 與column-family : f1

hbase(main):>	put 't1', 'r1', 'f1:c1', 'value'    

刪除 cell-value

hbase(main):>	deleteall ‘t1’,’r1’

列出cell-value

hbase(main):>	get 't1', 'r1'

• 執行結果參考

COLUMN                    CELL                                                                           
 f1:c1                    timestamp=1285041409509, value=value                                           
 f1:c2                    timestamp=1285041661078, value=9
            get ‘t1’, ‘r1’, {column => ‘f1:c1’}                       

加入column family

hbase(main):>	disable ‘t1’
hbase(main):>   alter 't1', {NAME => 'f1'}
hbase(main):>   enable ‘t1’

刪除column family

hbase(main):>	alter 't1', {NAME => 'f1', METHOD => 'delete'}

節點狀態

hbase(main):>	status

刪除整張table

hbase(main):>	truncate ‘t1’
hbase(main):>	disable ‘t1’
hbase(main):>	drop ‘t1’