克隆Open状态下的PRACTICE数据库

实验目的：在源数据库PRACTICEopen状态下，用alter tablespace .. begin backup 的方式备份全库。 用该备份在一台新的数据库服务器上恢复，验证备份的有效性。为了操作简便，克隆数据库端采用了dbca创建数据库，用源数据库的备份来覆盖所有文件，执行恢复操作来完成此次克隆。

源数据库：  192.168.1.20

克隆数据库：192.168.1.21

此次试验分为5个步骤

1 准备克隆数据库

2 备份打开的PRACTICE数据库

3 从源库复制备份到克隆库

4 恢复克隆的数据库

5 打开克隆的数据库

step1 准备克隆数据库

在克隆数据库主机上创建数据文件、归档日志、备份文件目录

mkdir /oradata

mkdir /archive

mkdir /backup

chown oracle:oinstall /oradata

chown oracle:oinstall /archive

chown oracle:oinstall /backup

dbca建库

step2 备份Open状态下的PRACTICE数据库

该脚本是在源数据库open状态下执行alter tablespace begin backup方式进行的。

@/backup/scripts/open_backup.sql

脚本如下

vi /backup/scripts/open_backup.sql

set feedback off

set pagesize 0

set heading off

set verify off

set linesize 100

set trimspool on

define dir = '/backup/open_backup'

define fil = '/backup/scripts/open_backup_commands.sql'

define spo = '&dir/open_backup_output.lst'

set serveroutput on

spool &fil

prompt spool &spo

prompt archive log list;;

prompt alter system switch logfile;;

prompt alter system archive log all;;

DECLARE

rem不备份临时表空间

CURSOR cur_tablespace IS

SELECT tablespace_name

FROM dba_tablespaces where tablespace_name<>'TEMP';

CURSOR cur_datafile (tn VARCHAR) IS

SELECT file_name

FROM dba_data_files

WHERE tablespace_name = tn;

BEGIN

FOR ct IN cur_tablespace LOOP

dbms_output.put_line ('alter tablespace '||ct.tablespace_name||' begin backup;');

FOR cd IN cur_datafile (ct.tablespace_name) LOOP

dbms_output.put_line ('host cp '||cd.file_name||' &dir');

END LOOP;

dbms_output.put_line ('alter tablespace '||ct.tablespace_name||' end backup;');

END LOOP;

END;

/

prompt alter system switch log file;;

rem 注意此处只备份了一个控制文件，需要手工复制一份到快速恢复区/u01/app/oracle/fast_recovery_area/PRACTICE

prompt alter database backup controlfile to '&dir./control01.ctl' REUSE;;

prompt archive log list;;

prompt spool off

spool off;

@&fil

step3 从源库复制备份到克隆库

在源数据库端root用户下执行以下复制操作

复制spfile文件

scp /u01/app/oracle/product/11.2.0/db_1/dbs/spfilePRACTICE.ora 192.168.1.21:/u01/app/oracle/product/11.2.0/db_1/dbs/

复制数据文件、控制文件

scp /backup/open_backup/* 192.168.1.21:/backup/

复制归档日志文件

scp -r /archive/ 192.168.1.21:/

在克隆数据库端修改组属

chown oracle:oinstall /u01/app/oracle/product/11.2.0/db_1/dbs/spfilePRACTICE.ora

chown oracle:oinstall /oradata

chown oracle:oinstall /archive

在克隆数据库端复制一份拷贝过来的控制文件到闪回区

cp /backup/control01.ctl /u01/app/oracle/fast_recovery_area/PRACTICE/control02.ctl

step4 恢复克隆的数据库

recover database until cancel using backup control file;

ORA-00279: change 1304004 generated at 08/02/2014 10:52:46 needed for thread 1

ORA-00289: suggestion : /archive/1_2_854446453.arc

ORA-00280: change 1304004 for thread 1 is in sequence #2

Specify log: {=suggested | filename | AUTO | CANCEL}

ORA-00279: change 1304100 generated at 08/02/2014 10:53:08 needed for thread 1

ORA-00289: suggestion : /archive/1_3_854446453.arc

ORA-00280: change 1304100 for thread 1 is in sequence #3

ORA-00278: log file '/archive/1_2_854446453.arc' no longer needed for this

recovery

Specify log: {=suggested | filename | AUTO | CANCEL}

ORA-00279: change 1304837 generated at 08/02/2014 11:03:41 needed for thread 1

ORA-00289: suggestion : /archive/1_4_854446453.arc

ORA-00280: change 1304837 for thread 1 is in sequence #4

ORA-00278: log file '/archive/1_3_854446453.arc' no longer needed for this

recovery

Specify log: {=suggested | filename | AUTO | CANCEL}

Log applied.

Media recovery complete.

SYS@PRACTICE >

SYS@PRACTICE >

SYS@PRACTICE >alter database open resetlogs;

step5 打开克隆的数据库

alter database open resetlogs;

由于dbca建库包含了temp01.dbf临时表空间文件，所以不需要再次添加了。