Hbase命令

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HBase Shell; enter 'help' for list of supported commands.

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Version 0.92.1, r1298924, Fri Mar  9 16:58:34 UTC 2012./hbase shell

1.查看服务器状态

hbase(main):001:0> status

1 servers, 0 dead, 3.0000 average load

2.查看hbase版本

hbase(main):002:0> version

0.92.1, r1298924, Fri Mar  9 16:58:34 UTC 2012

 

关于命名空间的命令：

1. 创建

2.　删除

3.　　修改

显示命名空间：

3.DDL操作

1).create命令

创建一个具有三个列簇"member_id"、"address"和"info"的表"member"，其中表名、行和列都要用单引号括起来，并以逗号隔开。

hbase(main):003:0> create 'member','member_id','address','info'

0 row(s) in 1.1770 seconds

 

2).list命令

查看当前HBase中都有哪些表

hbase(main):004:0> list

TABLE

member

test

2 row(s) in 0.0170 seconds

 

3).describe 命令

查看表的描述信息

hbase(main):006:0> describe 'member'

DESCRIPTION                                                                                 ENABLED

 {NAME => 'member', FAMILIES => [{NAME => 'address', BLOOMFILTER => 'NONE', REPLICATION_SCO true PE => '0', VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}, {NAME => 'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}, {NAME => 'member_id', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE =>'65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}

1 row(s) in 0.0320 seconds

 

4).删除一个列簇：disable，alter，enable

注意：修改表结构必须先disable

hbase(main):004:0> disable member

NameError: undefined local variable or method `member' for #

 

hbase(main):005:0> disable 'member'

0 row(s) in 2.1560 seconds

 

删除member表的info列簇

hbase(main):006:0> alter 'member', 'delete' => 'info'

Updating all regions with the new schema...

1/1 regions updated.

Done.

0 row(s) in 1.3370 seconds

 

记得enable表(disable：使表无效；enable：使表有效)

hbase(main):009:0> enable 'member'

0 row(s) in 2.2330 seconds

 

5).删除一个表test（disable，drop）

hbase(main):025:0> disable 'test'

0 row(s) in 2.2100 seconds

 

hbase(main):026:0> drop 'test'

0 row(s) in 1.2350 seconds

 

6).查询表是否存在

hbase(main):033:0> exists 'test'

Table test does not exist

0 row(s) in 0.1820 seconds

 

7).查看表是否enable

hbase(main):032:0> is_enabled 'member'

true

0 row(s) in 0.0070 seconds

 

2.DML操作

1).插入数据

hbase(main):005:0> put 'member','scutshuxue','info:age','24'

0 row(s) in 0.0790 seconds

 

hbase(main):005:0> put 'member','duansf','info:age','37'

0 row(s) in 0.0790 seconds

 

hbase(main):001:0> put 'member','scutshuxue','info:company','alibaba'

0 row(s) in 0.6520 seconds

 

hbase(main):002:0> put 'member','xiaofeng','address:contry','china'

0 row(s) in 0.0090 seconds

 

hbase(main):007:0> put 'member','xiaofeng','info:birthday','1987-4-17'

0 row(s) in 0.0120 seconds

注：插入语句后面一定不要有空格。

 

2).获取一条数据

hbase(main):012:0> get 'member','xiaofeng'

COLUMN                               CELL

 address:contry                      timestamp=1488307463293, value=china

 info:birthday                       timestamp=1488307533852, value=1987-4-17

2 row(s) in 0.0130 seconds

 

3).获取一条记录中某个列簇的信息

hbase(main):013:0> get 'member','xiaofeng','info'

COLUMN                               CELL

 info:birthday                       timestamp=1488307533852, value=1987-4-17

1 row(s) in 0.0100 seconds

 

4).获取一条记录的某个列簇中的某个列的信息

hbase(main):020:0> get 'member','xiaofeng','info:birthday'

COLUMN                               CELL

 info:birthday                       timestamp=1488307533852, value=1987-4-17

1 row(s) in 0.0090 seconds

 

5).更新一条记录

把duansf的年龄改为38岁

hbase(main):022:0>get 'member','duansf','info:age'

COLUMN                               CELL

 info:age                            timestamp=1488308172957, value=37

1 row(s) in 0.0090 seconds

hbase(main):022:0>put 'member','duansf','info:age','38'

6).删除member表中某个列

hbase(main):032:0* delete 'member','scutshuxue','info:age'

0 row(s) in 0.0080 seconds

7).member表全表扫描(类似于关系型数据库select *)

hbase(main):002:0> scan 'member'

ROW                                  COLUMN+CELL

 scutshuxue       column=info:age, timestamp=1488306890710, value=24

 scutshuxue       column=info:company, timestamp=1488307003752, value=alibaba

 xiaofeng          column=address:contry, timestamp=1488307463293, value=china

 xiaofeng        column=info:birthday, timestamp=1488307533852, value=1987-4-17

2 row(s) in 0.9780 seconds

8).删除整行 deleteall

hbase(main):036:0> deleteall 'member','scutshuxue'

0 row(s) in 0.0090 seconds

 

9).查询表中有多少行count

hbase(main):041:0> count 'member'

2 row(s) in 0.0240 seconds

 

10).清空整张表truncate

hbase(main):045:0>truncate 'member'

Truncating 'member' table (it may take a while):

 - Disabling table...

 - Dropping table...

 - Creating table...

0 row(s) in 4.8640 seconds