• Hbase shell 常用命令


    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
    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=x00x00x00x00x00x00x00x01 
    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=x00x00x00x00x00x00x00x02 
    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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  • 原文地址:https://www.cnblogs.com/andy6/p/7661111.html
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