冷备恢复背景

windows server2016下冷备只备份了app/administrator/下面的admin和oradata

冷备恢复流程

1.安装与原库相同的数据库版本oracle 11g 11.2.0.1.0，不创建实例

2.在app/administrator/下面建立flash_recovery_area目录

3.复制数据文件整个文件夹oradata和admin到app/administrator/

4.在app/administrator/admin/orcl/pfile下找到参数文件

修改memory_target参数注意该文件的单位是B（设置过大会出现out_of_memory）

5.将init.ora.3957975455的文件更名为initSID（如initORCL）复制到

app/administrator/product/11.2.0/dbhome_1/dbs/

app/administrator/product/11.2.0/dbhome_1/database/（该目录下必须有pfile即initORCL或者spfile文件）

6.收集相关信息

获取原来的数据库名（原pfile中就有）

字符集 SQL>startup nomount; SQL>select userenv('language') from dual;

7.控制文件脚本重建控制文件

先把数据库shutdown

SQL>@C:\rebuild.sql

STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS NOARCHIVELOG
    MAXLOGFILES 5
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 1
    MAXLOGHISTORY 226
LOGFILE
  GROUP 1 'C:\APP\Administrator\oradata\orcl\REDO01.LOG' SIZE 50M,
  GROUP 2 'C:\APP\Administrator\oradata\orcl\REDO02.LOG' SIZE 50M,
  GROUP 3 'C:\APP\Administrator\oradata\orcl\REDO03.LOG' SIZE 50M
DATAFILE
  'C:\APP\Administrator\oradata\orcl\SYSTEM01.DBF',
  'C:\APP\Administrator\oradata\orcl\SYSAUX01.DBF',
  'C:\APP\Administrator\oradata\orcl\UNDOTBS01.DBF',
  'C:\APP\Administrator\oradata\orcl\USERS01.DBF'
CHARACTER SET UTF8;

8.介质恢复并开启数据库

recover database;

9.alter database open;

10.重建服务和监听

1）建立服务

cmd

oradim -new -sid ORCL

2）用net configuration为orcl实例新建监听

3）在network\admin下的tnsnames.ora中添加如下片段

ORCL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ORCL)
    )
  )

4）重建口令文件

cmd

orapwd file=<fname> password=<password> entries=<users>

5）重启

数据库startup open

启动数据库服务和监听