1 shell-客户端
1.1 建表
create 是建表的关键字
help "create" 查看建表的基本语法
** create "tb_name" , "cf1" , "cf2" 在建表的时候至少指定一个列族
** create "tb_b" , {NAME => "cf1" , TTL=>60 , VERSIONS=>3} ,{NAME=>"cf2"}
属性的配置 描述整个列族
NAME 列族名称
VERSIONS 整个列族的所有的数据存储3个数据版本
TTL整个列族的所有的数据存储时间 单位秒
K=>V 里面设置的KEY是固定不变
{} , {} 多个列族
1.2 列出系统中所有的表
hbase> list
hbase> list 'abc.*'
hbase> list 'ns:abc.*'
hbase> list 'ns:.*'
1.2 修改表结构
添加修改删除列族 , 修改配置选项
1.2.1添加修改列族
alter 'tb_b', NAME => 'cf3', VERSIONS => 5 如果列族不存在 添加列族
alter 'tb_b', NAME => 'cf3', VERSIONS => 2 如果列族存在 修改列族的属性值
1.2.2 删除列族
hbase> alter 'ns1:t1', NAME => 'f1', METHOD => 'delete'
hbase> alter 'ns1:t1', 'delete' => 'f1'
alter "tb_b" , 'delete'=>"cf2"
1.2.3 修改列族的名字
删除要修改的列族
添加新的列族 保证配置属性一致
Commands: alter, alter_async, alter_status, clone_table_schema, create, describe, disable, disable_all, drop, drop_all, enable, enable_all, exists, get_table, is_disabled, is_enabled, list, list_regions, locate_region, show_filters
- alter
- create
- describe desc
- disable 禁用表
- disable_all 禁用多张表
- drop 删除表
- drop_all 删除多张表
- enable
- enable_all 启用多张表
- exists 是否存在
- is_disabled
- is_enabled
- list
- list_regions 列出表所有的region信息
- locate_region 查看某行数据在哪个region中
- show_filters 列出所有的过滤器 过滤器实现数据的筛选过滤
1 disable 禁用表
hbase(main):009:0> disable "tb_user"
Took 0.9212 seconds
hbase(main):010:0> is_disabled "tb_user"
true
Took 0.0388 seconds
=> 1
禁用的表是不能查询数据和更新数据 , 删除表, 修改表结构 , 读写数据和修改表内结构分离 DDL和DML分离
hbase(main):011:0> scan "tb_user"
ROW COLUMN+CELL
org.apache.hadoop.hbase.TableNotEnabledException: tb_user is disabled.hbase(main):012:0> put "tb_user" , "rk10004" ,"cf1:name" ,"abc"
ERROR: Table tb_user is disabled!
For usage try 'help "put"'2 disable_all 禁用多张表
hbase(main):027:0> disable_all "tb.*"
tb_a
tb_b
tb_userDisable the above 3 tables (y/n)?
y
3 tables successfully disabled
Took 10.8733 seconds
3 drop 删除表
Drop the named table. Table must first be disabled:
hbase> drop 't1'
hbase> drop 'ns1:t1'
disable "tb_a" drop "tb_a"
4 drop_all 删除多张表
disable_all "tb.*" 先禁用
drop_all "tb.*" 再删除
5 enable
-
enable_all 启用多张表
hbase(main):028:0> enable_all "tb.*"
tb_a
tb_b
tb_userEnable the above 3 tables (y/n)?
y
3 tables successfully enabled
Took 5.8575 seconds
6 exists 是否存在
hbase(main):043:0> exists "tb_a"
Table tb_a does not exist
Took 0.0210 seconds
=> falsehbase(main):045:0> exists "tb_b"
Table tb_b does exist
Took 0.0054 seconds
=> true
7is_disabled
8 is_enabled
hbase(main):022:0> is_enabled "tb_user"
true
Took 0.0172 seconds
=> true
hbase(main):023:0> is_disabled "tb_user"
false
Took 0.0185 seconds
=> 19 list
hbase(main):062:0> list "doit18:.*"
TABLE
doit18:tb_x
10 list_regions 列出表所有的region信息
hbase(main):070:0> list_regions "tb_a"
SERVER_NAME | REGION_NAME | START_KEY | END_KEY | SIZE | REQ | LOCALITY |
--------------------------- | ----------------------------------------------------- | ---------- | ---------- | ----- | ----- | ---------- |
linux03,16020,1601428264252 | tb_a,,1601434162446.0244bbb9434054d22637194b5e93d8ef. | | | 0 | 2 | 0.0 |
split "tb_a"
split "tb_a" ,"rk0003" 指定切割点
hbase(main):086:0> list_regions "tb_a"
SERVER_NAME | REGION_NAME | START_KEY | END_KEY | SIZE | REQ | LOCALITY |
--------------------------- | ----------------------------------------------------------- | ---------- | ---------- | ----- | ----- | ---------- |
linux03,16020,1601428264252 | tb_a,,1601435670399.622d39361afc04e550892b48bcda3ca6. | | rk0003 | 0 | 0 | 1.0 |
linux03,16020,1601428264252 | tb_a,rk0003,1601435670399.7df34040edf7d4ded53122fb4c6f034a. | rk0003 | | 0 | 0 | 1.0 |
2 rows
11 locate_region 查看某行数据在哪个region中 rk0003
hbase(main):089:0> list_regions "tb_a"
SERVER_NAME | REGION_NAME | START_KEY | END_KEY | SIZE | REQ | LOCALITY |
--------------------------- | ----------------------------------------------------------- | ---------- | ---------- | ----- | ----- | ---------- |
linux03,16020,1601428264252 | tb_a,,1601435670399.622d39361afc04e550892b48bcda3ca6. | | rk0003 | 0 | 0 | 1.0 |
linux01,16020,1601428264314 | tb_a,rk0003,1601435670399.7df34040edf7d4ded53122fb4c6f034a. | rk0003 | | 0 | 0 | 1.0 |
2 rows
Took 0.0614 seconds
hbase(main):090:0> locate_region "tb_a" , "rk0003"
HOST REGION
linux01:16020 { ENCODED => 7df34040edf7d4ded53122fb4c6f034a, NAME => 'tb_a,rk0003,1601435670399.7df34040edf7d4de
d53122fb4c6f034a.', STARTKEY => 'rk0003', ENDKEY => ''}
1 row(s)
Took 0.0056 seconds
12 预分region表
create "tb_s" , "cf" , SPLITS => ['4','7']
注意: 数据在Hbase中存储的时候是以rowkey进行排序,切割点划分数据存储范围[region存储数据的范围]
13 show_filters 列出所有的过滤器 过滤器实现数据的筛选过滤
显示系统中所有实现的过滤器
DML
Group name: dml
Commands: append, count, delete, deleteall, get, get_counter, get_splits, incr, put, scan, truncate, truncate_preserve
1 append
向已经存在的值后面追加内容
append "tb_a" , "rk0002", "cf:name" ," AAA"
2 count
统计数据的行数据
3 delete 删除数据
只能删除某行的某个列族的属性 只能删除单元格
delete "tb_a" , "rk0007" , "cf:name"
4 deleteall
delete tb_name , RK 删除整行
delete tb_name , RK, "cf:属性" 删除一个属性
5 get 获取数据
获取整行数据 get tb_name , rowkey
获取行的某个列族 get tb_name , rowkey , cf
获取行的多个列族get tb_name , rowkey , cf1 , cf2
获取行的某个单元格 get tb_name , rowkey , cf:属性
获取行的多个列族中的多个单元格 get tb_name , rowkey , cf:1:属性1 , cf1:属性2 , cf2:属性3
注意 在get总一定有表名和行键两个参数
6 get_counter 和 incr
incr "tb_a" , "rk0001" , "cf:c" , 1
incr "tb_a" , "rk0001" , "cf:c" , 1
incr "tb_a" , "rk0001" , "cf:c" , 4
7 get_splits 获取表的切割点
8 put 插入或者是更新数据
表 行 列族 属性 值
put tb_name , rowkey , 列族:属性 , 值
put "tb_a" ,"rk0007" , "cf:name" , "heihei"
9 scan
scan tb_name 查看表中所有的数据
scan tb_name , {STARTROW=>'rk0003' , LIMIT=>3 , COLUMN=>'列族'} 指定列族 起始位置
10 truncate
添加数据 修改数据 删除数据 查询数据
delete "tb_a" , "rk0001" , "cf:name"