Oracle数据库冷备份的还原及emca重建资料库
删除oracle数据库中已经建立的数据库,按照备份的oracle路径重新安装新建数据库,路径、数据库SMID必须和原来的完全一致。停止所
删除Oracle数据库中已经建立的数据库,,按照备份的oracle路径重新安装新建数据库,路径、数据库SMID必须和原来的完全一致。
停止所有的Oracle服务,到oracle安装目录下,把新建的数据库删除,把备份的文件夹复制进来。
重新启动oracle服务,此时可以通过sqlplus对数据库进行相关的操作,但要使用EM(Enterprise Manager)对数据库进行管理时会显示“Enterprise Manager 无法连接到数据库实例,下面列出了组件的状态”的信息,此时EM无法正常使用。出现问题的原因很多,可以用emca重建资料库解决。
emca重建资料库:
用sqlplus登录,删除早期DBCONSOLE创建的用户:
SQL> dropuser sysman cascade;
若正常的话会等待一段时间,可能会出现如下错误:
=========================================================
ERROR at line 1:
ORA-06553: PLS-801: internal error [56319]
=========================================================
错误原因:用64位系统上的备份片将数据库还原到32位系统中所产生,反过来也会产生此错误。
解决方案:运行脚本用32位系统重新编译一下内核参数即可
SQL> shutdown immediate;
SQL> startup upgrade;
SQL> @?/rdbms/admin/utlirp.sql
SQL> @?/rdbms/admin/utlrp.sql
SQL> shutdown immediate;
SQL> startup;
其中:
utlirp.sql的作用是把相关内容全部在32bit平台下编译一遍.
utlrp.sql的作用是编译所有失效对象.
然后再重新连接,就不会报错了。
接下来继续重建资料库
SQL> droprole MGMT_USER;
SQL> dropuser MGMT_VIEW cascade;
删除早期DBCONSOLE创建的对象:
SQL> droppublic synonym MGMT_TARGET_BLACKOUTS;
SQL> droppublic synonym SETEMVIEWUSERCONTEXT;
在配置oem时遇到“DBSNMP 用户名或密码无效”的错误,原因是DBSNMP系统用户可能被锁用,所以我们首先解锁DBSNMP用户。
登录:SQL>
解锁:SQL> alter user dbsnmp account unlock;
提交:SQL> commit;
修改密码:SQL>
提交:SQL> commit;
注意:提交很重要,不然解锁不会生效。
开始重新创建资料库,在命令行执行以下命令:
[oracle@localhost~]emca -repos recreate
此时如出现(一般不会出现)如下错误:
=========================================================
ORA-12526: TNS:listener: all appropriate instances are in restricted mode
=========================================================
原因是之前改字符集时执行了:
[oracle@localhost~]# ALTER SYSTEM ENABLE RESTRICTEDSESSION;
导致受限
解决办法:使用系统管理员身份运行以下一段代码
[oracle@localhost~]# ALTER SYSTEM DISABLE RESTRICTEDSESSION;
解决完以后再次执行:
[oracle@localhost~]# emca -repos recreate
[oracle@localhost~]# emctl stop agent
最后开始重建资料库:
[oracle@localhost~]# emca -config dbcontrol db
再次等待一小会时间,执行完毕以后重建资料库成功,启动Enterprise Manager:
[oracle@localhost ~]# emctl start dbconsole
在浏览器地址栏输入::1158/em即可使用Enterprise Manager管理数据库。若其他机器无法连接,关闭防火墙即可。
本文永久链接地址:

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











Solutions to Oracle cannot be opened include: 1. Start the database service; 2. Start the listener; 3. Check port conflicts; 4. Set environment variables correctly; 5. Make sure the firewall or antivirus software does not block the connection; 6. Check whether the server is closed; 7. Use RMAN to recover corrupt files; 8. Check whether the TNS service name is correct; 9. Check network connection; 10. Reinstall Oracle software.

The method to solve the Oracle cursor closure problem includes: explicitly closing the cursor using the CLOSE statement. Declare the cursor in the FOR UPDATE clause so that it automatically closes after the scope is ended. Declare the cursor in the USING clause so that it automatically closes when the associated PL/SQL variable is closed. Use exception handling to ensure that the cursor is closed in any exception situation. Use the connection pool to automatically close the cursor. Disable automatic submission and delay cursor closing.

In Oracle, the FOR LOOP loop can create cursors dynamically. The steps are: 1. Define the cursor type; 2. Create the loop; 3. Create the cursor dynamically; 4. Execute the cursor; 5. Close the cursor. Example: A cursor can be created cycle-by-circuit to display the names and salaries of the top 10 employees.

Oracle views can be exported through the EXP utility: Log in to the Oracle database. Start the EXP utility, specifying the view name and export directory. Enter export parameters, including target mode, file format, and tablespace. Start exporting. Verify the export using the impdp utility.

When Oracle log files are full, the following solutions can be adopted: 1) Clean old log files; 2) Increase the log file size; 3) Increase the log file group; 4) Set up automatic log management; 5) Reinitialize the database. Before implementing any solution, it is recommended to back up the database to prevent data loss.

Oracle is not only a database company, but also a leader in cloud computing and ERP systems. 1. Oracle provides comprehensive solutions from database to cloud services and ERP systems. 2. OracleCloud challenges AWS and Azure, providing IaaS, PaaS and SaaS services. 3. Oracle's ERP systems such as E-BusinessSuite and FusionApplications help enterprises optimize operations.

Building a Hadoop Distributed File System (HDFS) on a CentOS system requires multiple steps. This article provides a brief configuration guide. 1. Prepare to install JDK in the early stage: Install JavaDevelopmentKit (JDK) on all nodes, and the version must be compatible with Hadoop. The installation package can be downloaded from the Oracle official website. Environment variable configuration: Edit /etc/profile file, set Java and Hadoop environment variables, so that the system can find the installation path of JDK and Hadoop. 2. Security configuration: SSH password-free login to generate SSH key: Use the ssh-keygen command on each node

To stop an Oracle database, perform the following steps: 1. Connect to the database; 2. Shutdown immediately; 3. Shutdown abort completely.
