HBASE的shell使用
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也来hbase的shell吧
首先是登录hbase 了:
hbase(main):001:0> create 'tbname','row','column1','column2'
0 row(s) in 1.0730 seconds
hbase(main):004:0> list 'tbname'
TABLE
tbname
1 row(s) in 0.0290 seconds
Put操作:
0 row(s) in 0.2400 seconds
hbase(main):006:0> put 'tbname','row','column2:ff','ff:value'
0 row(s) in 0.0080 seconds
hbase(main):007:0> put 'tbname','row','column1:b','b:value'
0 row(s) in 0.0310 seconds
hbase(main):008:0> put 'tbname','row','column1:c','c:value'
0 row(s) in 0.0080 seconds
hbase(main):009:0> put 'tbname','row','column2:gg','gg:value'
0 row(s) in 0.0080 seconds
SCAN操作
ROW COLUMN+CELL
row column=column1:a, timestamp=1354556840011, value=a:value
row column=column1:b, timestamp=1354556861963, value=b:value
row column=column1:c, timestamp=1354556868862, value=c:value
row column=column2:ff, timestamp=1354556852040, value=ff:value
row column=column2:gg, timestamp=1354556885196, value=gg:value
1 row(s) in 0.1500 seconds
GET操作,获取表中的指定行
hbase(main):012:0> get 'tbname','row'
COLUMN CELLcolumn1:a timestamp=1354556840011, value=a:value
column1:b timestamp=1354556861963, value=b:value
column1:c timestamp=1354556868862, value=c:value
column2:ff timestamp=1354556852040, value=ff:value
column2:gg timestamp=1354556885196, value=gg:value
5 row(s) in 0.0230 seconds
GET操作,获取指定行列
hbase(main):014:0> get 'tbname','row','column1:a'
COLUMN CELLcolumn1:a timestamp=1354556840011, value=a:value
1 row(s) in 0.0150 seconds
参考:http://www.yankay.com/wp-content/hbase/book.html#shell_exercises
创建一个名为 test
的表,这个表只有一个 column family 为cf
。可以列出所有的表来检查创建情况,然后插入些值。
hbase(main):003:0> create 'test', 'cf'0 row(s) in 1.2200 secondshbase(main):003:0> list 'table'test1 row(s) in 0.0550 secondshbase(main):004:0> put 'test', 'row1', 'cf:a', 'value1'0 row(s) in 0.0560 secondshbase(main):005:0> put 'test', 'row2', 'cf:b', 'value2'0 row(s) in 0.0370 secondshbase(main):006:0> put 'test', 'row3', 'cf:c', 'value3'0 row(s) in 0.0450 seconds
以上我们分别插入了3行。第一个行key为row1
, 列为 cf:a
, 值是 value1
。Hbase中的列是由 column family前缀和列的名字组成的,以冒号间隔。例如这一行的列名就是a
.
检查插入情况.
Scan这个表,操作如下
hbase(main):007:0> scan 'test'ROW COLUMN+CELLrow1 column=cf:a, timestamp=1288380727188, value=value1row2 column=cf:b, timestamp=1288380738440, value=value2row3 column=cf:c, timestamp=1288380747365, value=value33 row(s) in 0.0590 seconds
Get一行,操作如下
hbase(main):008:0> get 'test', 'row1'COLUMN CELLcf:a timestamp=1288380727188, value=value11 row(s) in 0.0400 seconds
以下转自:http://blog.csdn.net/scutshuxue/article/details/6988348
Hbase shell 常用命令(1)
下面我们看看HBase Shell的一些基本操作命令,我列出了几个常用的HBase Shell命令,如下:
名称
命令表达式
创建表
create '表名称', '列名称1','列名称2','列名称N'
添加记录
put '表名称', '行名称', '列名称:', '值'
查看记录
get '表名称', '行名称'
查看表中的记录总数
count '表名称'
删除记录
delete '表名' ,'行名称' , '列名称'
删除一张表
先要屏蔽该表,才能对该表进行删除,第一步 disable '表名称' 第二步 drop '表名称'
查看所有记录
scan "表名称"
查看某个表某个列中所有数据
scan "表名称" , ['列名称:']
更新记录
就是重写一遍进行覆盖
下面是一些常见命令的说明,在hbaseshell中输入help的帮助信息,在本文中,我们先介绍前3个,后面2个,将在下一篇博文中介绍。
COMMAND GROUPS:
Group name: general
Commands: status, version
Group name: ddl
Commands: alter, create, describe, disable,drop, enable, exists, is_disabled, is_enabled, list
Group name: dml
Commands: count, delete, deleteall, get,get_counter, incr, put, scan, truncate
Group name: tools
Commands: assign, balance_switch, balancer,close_region, compact, flush, major_compact, move, split, unassign, zk_dump
Group name: replication
Commands: add_peer, disable_peer,enable_peer, remove_peer, start_replication, stop_replication
一、一般操作
1.查询服务器状态
hbase(main):024:0>status
3 servers, 0 dead,1.0000 average load
2.查询hive版本
hbase(main):025:0>version
0.90.4, r1150278,Sun Jul 24 15:53:29 PDT 2011
二、DDL操作
1.创建一个表
hbase(main):011:0>create 'member','member_id','address','info'
0 row(s) in 1.2210seconds
2.获得表的描述
hbase(main):012:0>list
TABLE
member
1 row(s) in 0.0160seconds
hbase(main):006:0>describe 'member'
DESCRIPTION ENABLED
{NAME => 'member', FAMILIES => [{NAME=> 'address', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', true
VERSIONS => '3', COMPRESSION => 'NONE',TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'fa
lse', BLOCKCACHE => 'true'}, {NAME =>'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSI
ONS => '3', COMPRESSION => 'NONE', TTL=> '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false',
BLOCKCACHE => 'true'}]}
1 row(s) in 0.0230seconds
3.删除一个列族,alter,disable,enable
我们之前建了3个列族,但是发现member_id这个列族是多余的,因为他就是主键,所以我们要将其删除。
hbase(main):003:0>alter 'member',{NAME=>'member_id',METHOD=>'delete'}
ERROR: Table memberis enabled. Disable it first before altering.
报错,删除列族的时候必须先将表给disable掉。
hbase(main):004:0>disable 'member'
0 row(s) in 2.0390seconds
hbase(main):005:0>alter'member',{NAME=>'member_id',METHOD=>'delete'}
0 row(s) in 0.0560seconds
hbase(main):006:0>describe 'member'
DESCRIPTION ENABLED
{NAME => 'member', FAMILIES => [{NAME=> 'address', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',false
VERSIONS => '3', COMPRESSION => 'NONE',TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'fa
lse', BLOCKCACHE => 'true'}, {NAME =>'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSI
ONS => '3', COMPRESSION => 'NONE', TTL=> '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false',
BLOCKCACHE => 'true'}]}
1 row(s) in 0.0230seconds
该列族已经删除,我们继续将表enable
hbase(main):008:0> enable 'member'
0 row(s) in 2.0420seconds
4.列出所有的表
hbase(main):028:0>list
TABLE
member
temp_table
2 row(s) in 0.0150seconds
5.drop一个表
hbase(main):029:0>disable 'temp_table'
0 row(s) in 2.0590seconds
hbase(main):030:0>drop 'temp_table'
0 row(s) in 1.1070seconds
6.查询表是否存在
hbase(main):021:0>exists 'member'
Table member doesexist
0 row(s) in 0.1610seconds
7.判断表是否enable
hbase(main):034:0>is_enabled 'member'
true
0 row(s) in 0.0110seconds
8.判断表是否disable
hbase(main):032:0>is_disabled 'member'
false
0 row(s) in 0.0110seconds
三、DML操作
1.插入几条记录
put'member','scutshuxue','info:age','24'
put'member','scutshuxue','info:birthday','1987-06-17'
put'member','scutshuxue','info:company','alibaba'
put'member','scutshuxue','address:contry','china'
put'member','scutshuxue','address:province','zhejiang'
put'member','scutshuxue','address:city','hangzhou'
put'member','xiaofeng','info:birthday','1987-4-17'
put'member','xiaofeng','info:favorite','movie'
put'member','xiaofeng','info:company','alibaba'
put'member','xiaofeng','address:contry','china'
put'member','xiaofeng','address:province','guangdong'
put'member','xiaofeng','address:city','jieyang'
put'member','xiaofeng','address:town','xianqiao'
2.获取一条数据
获取一个id的所有数据
hbase(main):001:0>get 'member','scutshuxue'
COLUMN CELL
address:city timestamp=1321586240244, value=hangzhou
address:contry timestamp=1321586239126, value=china
address:province timestamp=1321586239197, value=zhejiang
info:age timestamp=1321586238965, value=24
info:birthday timestamp=1321586239015, value=1987-06-17
info:company timestamp=1321586239071, value=alibaba
6 row(s) in 0.4720seconds
获取一个id,一个列族的所有数据
hbase(main):002:0>get 'member','scutshuxue','info'
COLUMN CELL
info:age timestamp=1321586238965, value=24
info:birthday timestamp=1321586239015, value=1987-06-17
info:company timestamp=1321586239071, value=alibaba
3 row(s) in 0.0210seconds
获取一个id,一个列族中一个列的所有数据
hbase(main):002:0>get 'member','scutshuxue','info:age'
COLUMN CELL
info:age timestamp=1321586238965, value=24
1 row(s) in 0.0320seconds
6.更新一条记录
将scutshuxue的年龄改成99
hbase(main):004:0>put 'member','scutshuxue','info:age' ,'99'
0 row(s) in 0.0210seconds
hbase(main):005:0>get 'member','scutshuxue','info:age'
COLUMN CELL
info:age timestamp=1321586571843, value=99
1 row(s) in 0.0180seconds
3.通过timestamp来获取两个版本的数据
hbase(main):010:0>get 'member','scutshuxue',{COLUMN=>'info:age',TIMESTAMP=>1321586238965}
COLUMN CELL
info:age timestamp=1321586238965, value=24
1 row(s) in 0.0140seconds
hbase(main):011:0>get 'member','scutshuxue',{COLUMN=>'info:age',TIMESTAMP=>1321586571843}
COLUMN CELL
info:age timestamp=1321586571843, value=99
1 row(s) in 0.0180seconds
4.全表扫描:
hbase(main):013:0>scan 'member'
ROW COLUMN+CELL
scutshuxue column=address:city, timestamp=1321586240244, value=hangzhou
scutshuxue column=address:contry, timestamp=1321586239126, value=china
scutshuxue column=address:province, timestamp=1321586239197, value=zhejiang
scutshuxue column=info:age,timestamp=1321586571843, value=99
scutshuxue column=info:birthday, timestamp=1321586239015, value=1987-06-17
scutshuxue column=info:company, timestamp=1321586239071, value=alibaba
temp column=info:age, timestamp=1321589609775, value=59
xiaofeng column=address:city, timestamp=1321586248400, value=jieyang
xiaofeng column=address:contry, timestamp=1321586248316, value=china
xiaofeng column=address:province, timestamp=1321586248355, value=guangdong
xiaofeng column=address:town, timestamp=1321586249564, value=xianqiao
xiaofeng column=info:birthday, timestamp=1321586248202, value=1987-4-17
xiaofeng column=info:company, timestamp=1321586248277, value=alibaba
xiaofeng column=info:favorite, timestamp=1321586248241, value=movie
3 row(s) in 0.0570seconds
5.删除id为temp的值的‘info:age’字段
hbase(main):016:0>delete 'member','temp','info:age'
0 row(s) in 0.0150seconds
hbase(main):018:0>get 'member','temp'
COLUMN CELL
0 row(s) in 0.0150seconds
6.删除整行
hbase(main):001:0>deleteall 'member','xiaofeng'
0 row(s) in 0.3990seconds
7.查询表中有多少行:
hbase(main):019:0>count 'member'
2 row(s) in 0.0160seconds
8.给‘xiaofeng’这个id增加'info:age'字段,并使用counter实现递增
hbase(main):057:0*incr 'member','xiaofeng','info:age'
COUNTER VALUE = 1
hbase(main):058:0>get 'member','xiaofeng','info:age'
COLUMN CELL
info:age timestamp=1321590997648, value=\x00\x00\x00\x00\x00\x00\x00\x01
1 row(s) in 0.0140seconds
hbase(main):059:0>incr 'member','xiaofeng','info:age'
COUNTER VALUE = 2
hbase(main):060:0>get 'member','xiaofeng','info:age'
COLUMN CELL
info:age timestamp=1321591025110, value=\x00\x00\x00\x00\x00\x00\x00\x02
1 row(s) in 0.0160seconds
获取当前count的值
hbase(main):069:0>get_counter 'member','xiaofeng','info:age'
COUNTER VALUE = 2
9.将整张表清空:
hbase(main):035:0>truncate 'member'
Truncating 'member'table (it may take a while):
- Disabling table...
- Dropping table...
- Creating table...
0 row(s) in 4.3430seconds
可以看出,hbase是先将掉disable掉,然后drop掉后重建表来实现truncate的功能的。
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