hbase（shell）实操

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1：开启hadoop集群
2：开启hbase集群
3：hbase shell

使用的学习方法
1:help查看hbase支持的命令，输入help ‘ xxxxx’，可以查看到该命令的使用方法！
2：按下tab键可以对命令进行补全
3：去官网学习，不用去买任何书，官网是最强的。http://hbase.apache.org
开始学习 了

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: 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, close_region, compact, compact_rs, flush, major_compact, merge_region, move, split, 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, list_peers, list_replicated_tables, remove_peer, remove_peer_tableCFs, set_peer_tableCFs, show_peer_tableCFs

  Group name: snapshots
  Commands: clone_snapshot, delete_all_snapshot, delete_snapshot, list_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, revoke, user_permission

  Group name: visibility labels
  Commands: add_labels, clear_auths, get_auths, list_labels, set_auths, set_visibility

SHELL USAGE:
Quote all names in HBase Shell such as table and column names.  Commas delimit
command parameters.  Type <RETURN> 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

Command: alter_namespace
Alter namespace properties.

To add/modify a property:

  hbase> alter_namespace 'ns1', {METHOD => 'set', 'PROERTY_NAME' => 'PROPERTY_VALUE'}

To delete a property:

  hbase> alter_namespace 'ns1', {METHOD => 'unset', NAME=>'PROERTY_NAME'}

Command: create_namespace
Create namespace; pass namespace name,
and optionally a dictionary of namespace configuration.
Examples:

  hbase> create_namespace 'ns1'
  hbase> create_namespace 'ns1', {'PROERTY_NAME'=>'PROPERTY_VALUE'}

Command: describe_namespace
Describe the named namespace. For example:
  hbase> describe_namespace 'ns1'

Command: drop_namespace
Drop the named namespace. The namespace must be empty.

Command: list_namespace
List all namespaces in hbase. Optional regular expression parameter could
be used to filter the output. Examples:

  hbase> list_namespace
  hbase> list_namespace 'abc.*'

Command: list_namespace_tables
List all tables that are members of the namespace.
Examples:

  hbase> list_namespace_tables 'ns1'

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