GPDB管理员笔记（一）数据库对象

数据库对象管理 1、创建数据库 create database new_dbname;      createdb -h localhost -p 5432 mydb 2、克隆数据库  3、查看数据 libo=# \l
                  List of databases
   Name    |  Owner  | Encoding |  Access privileges 
-----------+---------+----------+---------------------
libo      | gpadmin | UTF8     |
postgres  | gpadmin | UTF8     |
template0 | gpadmin | UTF8     | =c/gpadmin         
                                : gpadmin=CTc/gpadmin
template1 | gpadmin | UTF8     | =c/gpadmin         
                                : gpadmin=CTc/gpadmin
(4 rows)
select * from pg_database;
4、数据库属性变更 libo=# alter database libo owner to libo;
ALTER DATABASE
libo=# \l
                  List of databases
   Name    |  Owner  | Encoding |  Access privileges 
-----------+---------+----------+---------------------
libo      | libo    | UTF8     |
postgres  | gpadmin | UTF8     |
template0 | gpadmin | UTF8     | =c/gpadmin         
                                : gpadmin=CTc/gpadmin
template1 | gpadmin | UTF8     | =c/gpadmin         
                                : gpadmin=CTc/gpadmin
(4 rows)
5、使用gpfilespace创建文件系统 [gpadmin@mdw ~]$  gpfilespace -o gpfilespace_config
20140303:10:43:03:012223 gpfilespace:mdw:gpadmin-[INFO]:-
A tablespace requires a file system location to store its database
files. A filespace is a collection of file system locations for all components
in a Greenplum system (primary segment, mirror segment and master instances).
Once a filespace is created, it can be used by one or more tablespaces.


20140303:10:43:03:012223 gpfilespace:mdw:gpadmin-[INFO]:-getting config
Enter a name for this filespace
> libodisk

Checking your configuration:
Your system has 2 hosts with 2 primary and 2 mirror segments per host.
Your system has 1 hosts with 0 primary and 0 mirror segments per host.

Configuring hosts: [sdw2, sdw1]

Please specify 2 locations for the primary segments,

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