Hbase Shell常用命令--附实例

1.进入Hbase shell命令

       $>hbase shell

2.建议参照“help”命令

3.shell命令

       create创建表指令：

           hbase(main):021:0> create 'customer','baseinfo','address'

      put插入数据：

           hbase(main):021:0> put 'customer','row-1','baseinfo:name','zhangsan'

           hbase(main):021:0> put 'customer','row-1','baseinfo:age',12

           hbase(main):021:0> put 'customer','row-1','baseinfo:sex','男'

           hbase(main):021:0> put 'customer','row-1','address:city','长春'

       scan扫描表：

            hbase(main):021:0> scan 'customer'

 ROW                                 COLUMN+CELL                                                                                           

 row-1                              column=address:city, timestamp=1533057164343, value=changchun                                         

 row-1                              column=baseinfo:age, timestamp=1533057275350, value=23                                                

 row-1                              column=baseinfo:name, timestamp=1533056802314, value=zhangsan                                         

 row-1                              column=baseinfo:sex, timestamp=1533057120030, value=\xE7\x94\xB7\x0A                                  

1 row(s) in 0.1030 seconds

          说明：当前显示的为一条记录；

       get获取指令：

            hbase(main):021:0> get 'customer','row-1'

COLUMN                              CELL                                                                                                  

 address:city                       timestamp=1533057164343, value=changchun                                                              

 baseinfo:age                       timestamp=1533057275350, value=23                                                                     

 baseinfo:name                      timestamp=1533056802314, value=zhangsan                                                               

 baseinfo:sex                       timestamp=1533057120030, value=\xE7\x94\xB7\x0A                                                       

1 row(s) in 0.1500 seconds

       delete删除记录指令：

            hbase(main):072:0> delete 'customer','row-2','baseinfo:name'

       describe描述指令检索结构：

    hbase(main):084:0> desc 'customer'

Table customer is ENABLED                                                                                                                 

customer                                                                                                                                  

COLUMN FAMILIES DESCRIPTION                                                                                                               

{NAME => 'address', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}   

{NAME => 'baseinfo', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}  

2 row(s) in 0.5850 seconds

       VERSION版本，默认version为1，按timestamp时间戳进行降序：

           修改版本号：hbase(main):086:0> alter 'customer',{NAME=>'baseinfo',VERSIONS=>5}

                       hbase(main):084:0> desc 'customer'

   通过scan '表名',{VERSIONS=>*}指令，检索当前表的数据版本；

   执行delete删除命令时，如需按照ts(timestamp)时间戳进行删除操作时，之前版本一并删除掉；

       drop删除table指令：

           hbase(main):084:0> disable 'ns1:tablename'    //说明：禁用table

   hbase(main):084:0> drop 'ns1:tablename'       //说明：删除table

       get_table指令：将table映射成相对应的变量值(table实例)，通过table实例对表进行相关操作

           hbase(main):117:0> t1 = get_table 'customer'

   hbase(main):118:0> t1.scan

   hbase(main):119:0> t1.put 'row-2','baseinfo:name','zhangsan'

           hbase(main):120:0> t1.get 'row-2'

       namespace名字空间,相当于传统数据库的表空间：

           hbase(main):003:0> create_namespace 'ns1',{'author'=>'zhangyuejiu','data'=>'2018-07-31'}

           hbase(main):005:0> describe_namespace 'ns1'

DESCRIPTION                                                                                                                               

{NAME => 'ns1', author => 'zhangyuejiu', data => '2018-07-31'}                                                                            

1 row(s) in 0.0620 seconds

       balance负载均衡指令，需使用开关模式，原因负载均衡比较耗费资源：

           hbase(main):005:0> balance_switch true    //开启负载均衡

   hbase(main):005:0> balancer               //执行负载均衡

           hbase(main):005:0> balance_switch false   //关闭负载均衡

   hbase(main):005:0> balancer "force"       //强制负载均衡

    4.测试，使用Ruby语法添加数据

   hbase(main):003:0> create_namespace 'ns1'

           hbase(main):003:0> create 'ns1:student','info'

           hbase(main):003:0> for i in 'a'..'z' do   for j in 'a'..'z' do \

           hbase(main):009:2* put 'ns1:student',"row-#{i}#{j}","info:#{j}","#{j}"  end end