Oracle 12c Non CDB 数据库 切换成 CDB 测试

如果把数据库从11g 升级到12c，或者在12c中创建的，就是NON CDB，那么这样的数据库就是普通的单实例，和12c 之前的数据库没有区别，但12c 的特点就是CDB 管理，所以既然上12c，还是要切换成CDB 进行管理。

所以下面的测试步骤，就是把NON CDB 切换成CDB的步骤。

1.当前环境说明

当前数据库里已经启动了2个实例： bishuo和 test。

bishuo:/home/oracle@oracle>ps -ef |grep pmon
oracle 3666 1 0 13:25 ? 00:00:00 ora_pmon_bishuo
oracle 4507 1 0 13:49 ? 00:00:00 ora_pmon_test
oracle 4693 189245 0 13:49 pts/1 00:00:00 grep pmon

其中bishuo数据库是12C的CDB数据库：
SQL> select name,CDB from v$database;

NAME CDB
--------- ---
BISHUO YES

test数据库是12C的non cdb数据库
SQL> select name,CDB from v$database;

NAME CDB
--------- ---
TEST NO

SQL> set lin 130;
SQL> select * from v$version;

BANNER                                             CON_ID
-------------------------------------------------------------------------------- ----------
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production          0
PL/SQL Release 12.1.0.2.0 - Production                              0
CORE    12.1.0.2.0    Production                              0
TNS for Linux: Version 12.1.0.2.0 - Production                          0
NLSRTL Version 12.1.0.2.0 - Production                              0 

2.开始切换

2.1 Cleanly shutdown 数据库并用read only 打开
SQL> select name,cdb from v$database;

NAME CDB
--------- ---
TEST NO

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL> startup open read only;
ORACLE instance started.

Total System Global Area 6442450944 bytes
Fixed Size 4511656 bytes
Variable Size 1124075608 bytes
Database Buffers 5301600256 bytes
Redo Buffers 12263424 bytes
Database mounted.
Database opened.

SQL> select name,open_mode,cdb from v$database;

NAME OPEN_MODE CDB
--------- -------------------- ---
TEST READ ONLY NO

2.2 生成xml格式的数据库描述文件

SQL> BEGIN
DBMS_PDB.DESCRIBE(pdb_descr_file => '/tmp/test.xml');
END;
/ 2 3 4

PL/SQL procedure successfully completed.
2.3 关闭数据库

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

2.4 连接CDB并创建PDB

bishuo:/home/oracle@oracle>sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Tue Nov 21 14:02:06 2017

Copyright (c) 1982, 2014, Oracle. All rights reserved.

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> select name,open_mode,cdb from v$database;

NAME OPEN_MODE CDB
--------- -------------------- ---
BISHUO READ WRITE YES

创建PDB:

SQL> select con_id,dbid,name,open_mode from v$pdbs;

CON_ID DBID NAME OPEN_MODE
---------- ---------- ------------------------------ ----------
2 1534143422 PDB$SEED READ ONLY

SQL> CREATE PLUGGABLE DATABASE test USING '/tmp/test.xml'
COPY
FILE_NAME_CONVERT = ('/home/oracle/oradata/12ctest/TEST/', '//home/oracle/oradata/bishuo/test/'); 2 3

Pluggable database created.
数据库复制成功：
test:/home/oracle/oradata/bishuo/test@oracle>pwd
/home/oracle/oradata/bishuo/test
test:/home/oracle/oradata/bishuo/test@oracle>ls
sysaux01.dbf  system01.dbf  temp01.dbf  users01.dbf 

2.5 切换到PDB并执行脚本
SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 TEST MOUNTED
SQL> alter session set container=test;
Session altered.

--执行脚本：
sql> @$ORACLE_HOME/rdbms/admin/noncdb_to_pdb.sql

这个脚本时间有点长，大概执行20分钟左右


2.6 启动PDB并检查状态
SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
3 TEST MOUNTED
SQL> show con_name

CON_NAME
------------------------------
TEST
SQL> alter pluggable database test open;

Pluggable database altered.

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
3 TEST READ WRITE NO
SQL> SELECT name, open_mode FROM v$pdbs;

NAME OPEN_MODE
------------------------------ ----------
TEST READ WRITE

1 row selected.

这是之前插入的测试数据：
SQL> select * from test;

        ID NAME
---------- ----------
         1 shiyu

1 row selected.