{{{
#!html
<div style="text-align: center; color:#151B8D"><big style="font-weight: bold;"><big><big>
Hbase 使用方法
</big></big></big></div> <div style="text-align: center; color:#7E2217"><big style="font-weight: bold;"><big>
HBase 0.20 + Hadoop 0.20
</big></big></div>
}}}
[[PageOutline]]

 = 列出所有 table = 

{{{
hbase(main):>	list
}}}

 = 新增 table = 

 A .  直接增加一個表 t2

{{{
hbase(main):>	create 't2'
}}}

 B . 增加一個擁有 'f1','f2','fn' 為 column family 的表: t1

{{{
hbase(main):>	create 't1','f1','f2','fn'   
}}}

 = 查詢 Table 欄位 =

{{{
hbase(main):> describe 't1'
}}}

執行結果參考 

{{{
#!text
hbase(main):> describe 't1'
DESCRIPTION                                                             ENABLED                               
 {NAME => 't1', FAMILIES => [{NAME => 'f1', COMPRESSION => 'NONE', VERS true                                  
 IONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => '                                       
 false', BLOCKCACHE => 'true'}, {NAME => 'f2', COMPRESSION => 'NONE', V                                       
 ERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =                                       
 > 'false', BLOCKCACHE => 'true'}, {NAME => 'fn', COMPRESSION => 'NONE'                                       
 , VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMOR                                       
 Y => 'false', BLOCKCACHE => 'true'}]}                                                                        
1 row(s) in 0.0170 seconds
}}}


 = 加入cell-value = 

需先擁有表 t1 與column-family : f1
並且加入一個 column-quantifier c1 
 
{{{
hbase(main):>	put 't1', 'r1', 'f1', 'v1'    
hbase(main):>	put 't1', 'r1', 'f1:c1', 'v2'    
hbase(main):>	put 't1', 'r2', 'f2', 'v3'
hbase(main):>	put 't1', 'r2', 'f2:c2', 'v4'
}}}

{{{
#!html
<table border='1'>
<tr><td colspan='7'>Table: 't1'</td></tr>
<tr><td rowspan='2'>row-key</td><td colspan='2'>'f1'</td><td colspan='2'>'f2'</td><td>'fn'</td><td>column-family</td></tr>
<tr><td>*</td><td>'c1'</td><td>*</td><td>'c2'</td><td>*</td><td>column-quantifier</td></tr>
<tr><td rowspan='2'>r1</td><td>v1</td><td></td><td></td><td></td><td></td></tr>
<tr><td></td><td>v2</td><td></td><td></td><td></td></tr>
<tr><td rowspan='2'>r2</td><td></td><td></td><td>v3</td><td></td><td></td></tr>
<tr><td></td><td></td><td></td><td>v4</td><td></td></tr>
</table>
}}}

 = 列出cell-value = 

 A . 列出一列(row)

{{{
hbase(main):>	get 't1', 'r1'
}}}
 
執行結果參考

   {{{
#!text
COLUMN                   	CELL                
 f1:                         timestamp=1285737082689, value=v1                                                
 f1:c1                       timestamp=1285737085874, value=v2                                          
   }}}

 B . 列出一個 cell 的值

{{{
hbase(main):>   get 't1', 'r1', {COLUMN => 'f1:c1'}
}}}    
   
執行結果參考

   {{{
#!text
COLUMN                       CELL                                                                             
 f1:c1                       timestamp=1285732474078, value=value                                             
1 row(s) in 0.0030 seconds    
   }}}

 = 刪除 cell-value = 

{{{
hbase(main):>	deleteall 't1','r1'
}}}

執行結果：會把 row-key 是 '!r1' 的所有紀錄。此時資料表 't1' 會變成如下表所示。
{{{
hbase(main):> scan 't1'                 
ROW    COLUMN+CELL                                                                      
 r2    column=f2:, timestamp=1285737091644, value=v3                                    
 r2    column=f2:c2, timestamp=1285737094157, value=v4
}}}

{{{
#!html
<table border='1'>
<tr><td colspan='7'>Table: 't1'</td></tr>
<tr><td rowspan='2'>row-key</td><td colspan='2'>'f1'</td><td colspan='2'>'f2'</td><td>'fn'</td><td>column-family</td></tr>
<tr><td>*</td><td>'c1'</td><td>*</td><td>'c2'</td><td>*</td><td>column-quantifier</td></tr>
<tr><td rowspan='2'>r2</td><td></td><td></td><td>v3</td><td></td><td></td></tr>
<tr><td></td><td></td><td></td><td>v4</td><td></td></tr>
</table>
}}}

 = 加入column family = 

{{{
hbase(main):>	disable 't1'
hbase(main):>   alter 't1', {NAME => 'f3'}
hbase(main):>   enable 't1'
}}}    

執行結果：多了一個 column-family 'f3' 可以用 describe 指令查詢，結果示意如下表：

{{{
hbase(main):021:0> describe 't1'
DESCRIPTION                                                             ENABLED                               
 {NAME => 't1', FAMILIES => [{NAME => 'f1', COMPRESSION => 'NONE', VERS true                                  
 IONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => '                                       
 false', BLOCKCACHE => 'true'}, {NAME => 'f2', COMPRESSION => 'NONE', V                                       
 ERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =                                       
 > 'false', BLOCKCACHE => 'true'}, {NAME => 'f3', VERSIONS => '3', COMP                                       
 RESSION => 'NONE', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMOR                                       
 Y => 'false', BLOCKCACHE => 'true'}, {NAME => 'fn', COMPRESSION => 'NO                                       
 NE', VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_ME                                       
 MORY => 'false', BLOCKCACHE => 'true'}]}
}}}


{{{
#!html
<table border='1'>
<tr><td colspan='8'>Table: 't1'</td></tr>
<tr><td rowspan='2'>row-key</td><td colspan='2'>'f1'</td><td colspan='2'>'f2'</td><td bgcolor='red'>'f3'</td><td>'fn'</td><td>column-family</td></tr>
<tr><td>*</td><td>'c1'</td><td>*</td><td>'c2'</td><td bgcolor='red'>*</td><td>*</td><td>column-quantifier</td></tr>
<tr><td rowspan='2'>r2</td><td></td><td></td><td>v3</td><td></td><td bgcolor='red'></td><td></td></tr>
<tr><td></td><td></td><td></td><td>v4</td><td bgcolor='red'></td><td></td></tr>
</table>
}}}

 = 刪除column family = 

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

執行結果：會移除 column family 為 'f1' 的所有欄位，可用 describe 指令確認，結果如下表所示。

{{{
#!html
<table border='1'>
<tr><td colspan='8'>Table: 't1'</td></tr>
<tr><td rowspan='2'>row-key</td><td bgcolor='red'></td><td colspan='2'>'f2'</td><td>'f3'</td><td>'fn'</td><td>column-family</td></tr>
<tr><td bgcolor='red'></td><td>*</td><td>'c2'</td><td>*</td><td>*</td><td>column-quantifier</td></tr>
<tr><td rowspan='2'>r2</td><td bgcolor='red'></td><td>v3</td><td></td><td></td><td></td></tr>
<tr><td bgcolor='red'></td><td></td><td>v4</td><td></td><td></td></tr>
</table>
}}}



 = 節點狀態 = 

{{{
hbase(main):>	status
}}}    

 = 刪除整張table = 

{{{
hbase(main):>	truncate 't1'
}}}

 * 執行完 truncate 後，所有 't1' 的內容都會被移除。但此時，下 list 還會有 't1' 這個表格存在。

{{{
hbase(main):>	disable 't1'
hbase(main):>	drop 't1'
}}}    

 * 要完整移除 't1' 資料表，必須使用 disable 先將 't1' 停用，再用 drop 指令把 't1' 完全刪除。