2018-08-15期 HBase命令行使用案例

1、进入hbase命令行

[root@hadoop-server01 bin]# hbase shell

2、命令行帮助

COMMAND GROUPS:

Group name: general

Commands: status, table_help, version, whoami

Group name: ddl

Commands: alter, alter_async, alter_status, create, describe, disable, disable_all, drop, drop_all, enable, enable_all, exists, get_table, is_disabled, is_enabled, list, show_filters

Group name: namespace

Commands: alter_namespace, create_namespace, describe_namespace, drop_namespace, list_namespace, list_namespace_tables

Group name: dml

Commands: count, delete, deleteall, get, get_counter, incr, put, scan, truncate, truncate_preserve

Group name: tools

Commands: assign, balance_switch, balancer, catalogjanitor_enabled, catalogjanitor_run, catalogjanitor_switch, close_region, compact, flush, hlog_roll, major_compact, merge_region, move, split, trace, unassign, zk_dump

Group name: replication

Commands: add_peer, disable_peer, enable_peer, list_peers, list_replicated_tables, remove_peer

Group name: snapshot

Commands: clone_snapshot, delete_snapshot, list_snapshots, rename_snapshot, restore_snapshot, snapshot

Group name: security

Commands: grant, revoke, user_permission

3、简单命令

--查看有哪些表

hbase(main):003:0* list

TABLE

0 row(s) in 0.7800 seconds

=> []

--状态

hbase(main):004:0> status

3 servers, 0 dead, 0.6667 average load

4、创建表

hbase(main):001:0> create 'user_info',{NAME => 'base_info',VERSIONS => 3},{NAME => 'extra_info'}

hbase(main):004:0> list

TABLE

user_info

1 row(s) in 0.0310 seconds

=> ["user_info"]

说明：指定VERSIONS参数为n，代表存放多少份版本数据，3表示存放3份

通过hdfs文件系统查看创建表情况

http://192.168.1.201:60010/tablesDetailed.jsp

5、插入数据

--第一行数据插入了4个值，base_info列族3个字段，extra_info一个字段

hbase(main):007:0> put 'user_info','rk0001','base_info:id','1'

0 row(s) in 0.0760 seconds

hbase(main):008:0> put 'user_info','rk0001','base_info:name','zhangsan'

0 row(s) in 0.0070 seconds

hbase(main):009:0> put 'user_info','rk0001','base_info:age','20'

0 row(s) in 0.0040 seconds

hbase(main):010:0> put 'user_info','rk0001','extra_info:addr','beijing'

0 row(s) in 0.0100 seconds

--第二行数据插入了4个值，base_info列族3个字段，extra_info没有插入值

hbase(main):011:0> put 'user_info','rk0002','base_info:id','2'

0 row(s) in 0.0060 seconds

hbase(main):012:0> put 'user_info','rk0002','base_info:name','lisi'

0 row(s) in 0.0060 seconds

hbase(main):013:0> put 'user_info','rk0002','base_info:sex','male'

0 row(s) in 0.0040 seconds

6、查询数据

scan命令

--全扫描

hbase(main):014:0> scan 'user_info'

ROW COLUMN+CELL

rk0001 column=base_info:age, timestamp=1530777071212, value=20

rk0001 column=base_info:id, timestamp=1530777007369, value=1

rk0001 column=base_info:name, timestamp=1530777057518, value=zhangsan

rk0001 column=extra_info:addr, timestamp=1530777108794, value=beijing

rk0002 column=base_info:id, timestamp=1530777246035, value=2

rk0002 column=base_info:name, timestamp=1530777259141, value=lisi

rk0002 column=base_info:sex, timestamp=1530777271117, value=male

2 row(s) in 0.0490 seconds

说明：hbase中，列族和kv都会都会自动排序，排序的贵州是按照列族名称和列名称的字典顺序

--范围查找

hbase(main):039:0> scan 'user_info', {COLUMNS => ['base_info','extra_info'], LIMIT => 10, STARTROW => 'rk0002'}

ROW COLUMN+CELL

rk0002 column=base_info:id, timestamp=1530777246035, value=2

rk0002 column=base_info:name, timestamp=1530777259141, value=lisi

rk0002 column=base_info:sex, timestamp=1530777271117, value=male

rk0003 column=base_info:id, timestamp=1530778028883, value=4

rk0005 column=base_info:sex, timestamp=1530778061222, value=female

rk0006 column=base_info:id, timestamp=1530778703899, value=12

rk0006 column=extra_info:addr, timestamp=1530778724940, value=shanghai

rk006 column=extra_info:code, timestamp=1530778095821, value=04442223

hbase(main):040:0> scan 'user_info', {COLUMNS => ['base_info'], LIMIT => 10, STARTROW => 'rk0002'}

ROW COLUMN+CELL

rk0002 column=base_info:id, timestamp=1530777246035, value=2

rk0002 column=base_info:name, timestamp=1530777259141, value=lisi

rk0002 column=base_info:sex, timestamp=1530777271117, value=male

rk0003 column=base_info:id, timestamp=1530778028883, value=4

rk0005 column=base_info:sex, timestamp=1530778061222, value=female

rk0006 column=base_info:id, timestamp=1530778703899, value=12

hbase(main):049:0> scan 'user_info', {COLUMNS => ['base_info','extra_info'], TIMERANGE => [1530777057518,1530778095821]}