【四】HBase Shell命令
shell命令
创建表 create
create 'tablename','column family1','column family2'
create 'wc','cf'
添加记录 put
put 'tablename','row key','column family:column name','value'
put 'wc','hello','cf:hello','5'
put 'wc','hello','cf:word','hello'
put 'wc','hello','cf:value','5'
查看某行 get
get 'tablename','row key'
get 'wc','hello'
查看某个列族
get 'tablename','row key',{COLUMN => 'column family'}
get 'wc','hello',{COLUMN => 'cf'}
查看某个单元格
get 'tablename','row key',{COLUMN => 'column family:column name'}
get 'wc','hello',{COLUMN => 'cf:hello'}
查看表中的记录总数 count
count 'tablename'
count 'wc'
删除单元格 delete
delete 'tablename','row key','column family:column name'
delete 'wc','hello','cf:hello'
删除整行 delete。
deleteall 'tablename','row key'
deleteall 'wc','hello'
删除一张表，先要屏蔽该表再删除 drop
disable 'tablename'
drop 'tablename'
查看表中所有记录 scan
scan 'tablename'
scan 'wc'
修改记录
就是重新插入一条row key相同的数据即可。没有update的用法。
查看有哪些表 list
list
alter
alter ‘tablename’,NAME=>’familyname’,attribute=>new_value
给表添加列族 alter
添加一个名字叫sid的列族VERSIONS值为5
alter 'wc',NAME=>'sid',VERSION=>5
将表设置为只读模式
alter ‘tablename’,READONLY
删除表范围运算符，需首先将表disable
alter ‘tablename’,METHOD=>’table_att_unset’,NAME=>’MAX_FILESIZE’
删除列族，需首先将表disable
alter ‘tablename’,’delete’=>’column family’
删除一个列族之后，这个列族的数据也会全部被删除。
修改表的cf的TTL为180天
disable 'tablename'
alter 'tablename',{NAME=>'body',TTL=>'15552000'},{NAME=>'meta', TTL=>'15552000'}
enable 'tablename'
incr 计数器
incr 'tablename','rowkey','column family:column' step step是步长，可选，默认为1
给‘id’这个行健增加'column_famaly1:addr'字段，并使用counter实现递增
hbase(main):002:0> incr 'table','id','column_famaly1:addr'
COUNTER VALUE = 1
0 row(s)
hbase(main):003:0> incr 'table','id','column_famaly1:addr'
COUNTER VALUE = 2
0 row(s)
hbase(main):004:0> get 'table','id','column_famaly1:addr'
COLUMN CELL
column_famaly1:addr timestamp=1463056705124, value=\x00\x00\x00\x00\x00\x00\x0
0\x02
1 row(s)
hbase(main):005:0> incr 'table','id','column_famaly1:addr'
COUNTER VALUE = 3
0 row(s)获取计数器当前值
get_counter 'tablename','rowkey','column family:column'
组命令Group name
general
status 查看当前集群状态
查看当前用户是谁
whoami
namespace
创建命名空间
create_namespace 'ns name'
create_namespace 'sid'
查看有哪些命名空间
list_namespace
删除命名空间
drop_namespace 'ns name'
其他命令，输入help会显示。这里不做过多介绍。
hbase(main):004:0> help
HBase Shell, version 1.4.4, rfe146eb48c24d56dbcd2f669bb5ff8197e6c918b, Sun Apr 22 20:42:02 PDT 2018
Type 'help "COMMAND"', (e.g. 'help "get"' -- the quotes are necessary) for help on a specific command.
Commands are grouped. Type 'help "COMMAND_GROUP"', (e.g. 'help "general"') for help on a command group.
COMMAND GROUPS:
Group name: general
Commands: processlist, 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, list_regions, locate_region, show_filters
Group name: namespace
Commands: alter_namespace, create_namespace, describe_namespace, drop_namespace, list_namespace, list_namespace_tables
Group name: dml
Commands: append, count, delete, deleteall, get, get_counter, get_splits, incr, put, scan, truncate, truncate_preserve
Group name: tools
Commands: assign, balance_switch, balancer, balancer_enabled, catalogjanitor_enabled, catalogjanitor_run, catalogjanitor_switch, cleaner_chore_enabled, cleaner_chore_run, cleaner_chore_switch, clear_deadservers, close_region, compact, compact_rs, compaction_state, flush, is_in_maintenance_mode, list_deadservers, major_compact, merge_region, move, normalize, normalizer_enabled, normalizer_switch, split, splitormerge_enabled, splitormerge_switch, trace, unassign, wal_roll, zk_dump
Group name: replication
Commands: add_peer, append_peer_tableCFs, disable_peer, disable_table_replication, enable_peer, enable_table_replication, get_peer_config, list_peer_configs, list_peers, list_replicated_tables, remove_peer, remove_peer_tableCFs, set_peer_bandwidth, set_peer_tableCFs, show_peer_tableCFs, update_peer_config
Group name: snapshots
Commands: clone_snapshot, delete_all_snapshot, delete_snapshot, delete_table_snapshots, list_snapshots, list_table_snapshots, restore_snapshot, snapshot
Group name: configuration
Commands: update_all_config, update_config
Group name: quotas
Commands: list_quotas, set_quota
Group name: security
Commands: grant, list_security_capabilities, revoke, user_permission
Group name: procedures
Commands: abort_procedure, list_procedures
Group name: visibility labels
Commands: add_labels, clear_auths, get_auths, list_labels, set_auths, set_visibility
Group name: rsgroup
Commands: add_rsgroup, balance_rsgroup, get_rsgroup, get_server_rsgroup, get_table_rsgroup, list_rsgroups, move_servers_rsgroup, move_servers_tables_rsgroup, move_tables_rsgroup, remove_rsgroup, remove_servers_rsgroup
SHELL USAGE:
Quote all names in HBase Shell such as table and column names. Commas delimit
command parameters. Type after entering a command to run it.
Dictionaries of configuration used in the creation and alteration of tables are
Ruby Hashes. They look like this:
{'key1' => 'value1', 'key2' => 'value2', ...}
and are opened and closed with curley-braces. Key/values are delimited by the
'=>' character combination. Usually keys are predefined constants such as
NAME, VERSIONS, COMPRESSION, etc. Constants do not need to be quoted. Type
'Object.constants' to see a (messy) list of all constants in the environment.
If you are using binary keys or values and need to enter them in the shell, use
double-quote'd hexadecimal representation. For example:
hbase> get 't1', "key\x03\x3f\xcd"
hbase> get 't1', "key\003\023\011"
hbase> put 't1', "test\xef\xff", 'f1:', "\x01\x33\x40"
The HBase shell is the (J)Ruby IRB with the above HBase-specific commands added.
For more on the HBase Shell, see http://hbase.apache.org/book.html