![Unplugging一个PDB]( "Unplugging一个PDB")
Unplugging一个PDB
Unplugging一个pdb不等于remove一个pdb
Unplugging一个pdb会创建一个对应的xml文件，借助该xml文件可以将其添加到其他的cdb
pdb被Unplugging后，还会在v$containers中显示，只是状态为mounted
创建一个目录，用来放Unplugging pdb时创建对应的xml文件
$mkdir -p /u12/app/oracle/unplug/unplugdb
$ sqlplus '/as sysdba'
SQL*Plus: Release 12.1.0.1. Production on Tue Jun ::
Copyright (c) , , Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1. - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
SQL> show con_name;
CON_NAME
------------------------------
CDB$ROOT
SQL> select con_id,name,open_mode,restricted from v$pdbs order by ;
CON_ID NAME OPEN_MODE RES
---------- ------------------------------ ---------- ---
PDB$SEED READ ONLY NO
YB READ ONLY NO
YB1 MOUNTED
CLONEDB READ WRITE NO
SQL> alter session set container=clonedb;
Session altered.
SQL> shutdown immediate;
Pluggable Database closed.
SQL> conn /as sysdba
Connected.
SQL> show con_name;
CON_NAME
------------------------------
CDB$ROOT
SQL> select con_id,name,open_mode,restricted from v$pdbs order by ;
CON_ID NAME OPEN_MODE RES
---------- ------------------------------ ---------- ---
PDB$SEED READ ONLY NO
YB READ ONLY NO
YB1 MOUNTED
CLONEDB MOUNTED
SQL> alter pluggable database clonedb unplug into '/u12/app/oracle/unplug/unplugdb/unplugdb.xml';
Pluggable database altered.
SQL> select con_id,name,open_mode,restricted from v$pdbs order by ;
CON_ID NAME OPEN_MODE RES
---------- ------------------------------ ---------- ---
PDB$SEED READ ONLY NO
YB READ ONLY NO
YB1 MOUNTED
CLONEDB MOUNTED
SQL> select name,open_mode,total_size from v$pdbs;
NAME OPEN_MODE TOTAL_SIZE
------------------------------ ---------- ----------
PDB$SEED READ ONLY
YB READ ONLY
YB1 MOUNTED
CLONEDB MOUNTED
SQL> select pdb_name,status from dba_pdbs;
PDB_NAME STATUS
-------------------------------------------------- -------------
YB NORMAL
PDB$SEED NORMAL
YB1 NORMAL
CLONEDB UNPLUGGED
如果想重用该pdb，需要先将该pdb删除，再重新plug到cdb中
SQL> drop pluggable database clonedb;
Pluggable database dropped.
SQL> select pdb_name,status from dba_pdbs;
PDB_NAME STATUS
-------------------------------------------------- -------------
YB NORMAL
PDB$SEED NORMAL
YB1 NORMAL
SQL>
