search
HomeDatabaseMysql Tutorialoracle控制文件的恢复有备份、有控制文件创建脚本、都没有3

控制文件的恢复分两步: 1.从备份还原; 2.用重做日志恢复。 一、有备份的控制文件恢复 控制文件按备份的时间跨度分类: 1).在线镜像备份:当前控制文件,即control_files初始化参数所指向的除去损坏的控制文件以外的控制文件; 2).结构备份:控制文件备份后

控制文件的恢复分两步:

1.从备份还原;

2.用重做日志恢复。


一、有备份的控制文件恢复

控制文件按备份的时间跨度分类:

1).在线镜像备份:当前控制文件,即control_files初始化参数所指向的除去损坏的控制文件以外的控制文件;

2).结构备份:控制文件备份后,数据库的结构没发生变化(例如添加删除表空间、重做日志文件);

3).历史备份:控制文件备份后,数据库的结构发生了变化。

发现控制文件损坏后

1.SQL>shutdown abort

2.SQL>startup

提示错误ora-00205控制文件出错或ora-00227控制文件存在坏块,数据库启动到started状态


3.首先看是否存在在线镜像备份,若存在,则按以下步骤恢复:

1)查看警告日志,确定哪些控制文件损坏了;

2)将正确的控制文件复制到损坏了的控制文件的位置上;

3)SQL>alter database mount;

4)SQL>alter database open;


否则,看是否存在结构备份,若存在,按以下步骤恢复:

1)进入rman:rman target/

2)从备份中还原控制文件

RMAN>restore controlfile from autobackup;(自动备份)

RMAN>restore controlfile from '手动备份的控制文件的位置';(手动备份)

3)设置数据库到mount状态

RMAN>alter database mount;

4)介质恢复

RMAN>recover database;

5)RMAN>alter database open resetlogs;


如果只有历史备份:

使用历史备份后会出现不一致,以下2种情况需要手动修复不一致:

1)备份控制文件中具有某个数据文件或表空间的信息,但实际不存在

2)备份中没有某个在线日志组的信息,但实际是存在的(在恢复时用recover database using backup controlfile在提示中输入相应的在线日志的路径)


A、对于自动修复不一致的情况,其恢复步骤与结构备份的手动备份相同

B、备份控制文件中具有某个数据文件或表空间的信息,但实际不存在

1)进入rman:rman target/

2)从备份中还原控制文件

RMAN>restore controlfile from '手动备份的控制文件的位置';(手动备份)

3)设置数据库到mount状态

RMAN>alter database mount;

4)此时不能直接回复数据库,而应使恢复操作不理睬这个丢失的数据文件或表空间

数据文件:

SQL>alter database datafile 文件号 offline;(数据文件)

恢复数据库

SQL>recover database using backup controlfile;

表空间(包括表空间内所有数据文件):

SQL>recover database skip tablespace 表空间名;

5)RMAN>alter database open resetlogs;


二、没有控制文件备份,但对控制文件做了追踪备份,即有创建控制文件的脚本

1.SQL>shutdown abort

2.SQL>startup

提示错误ora-00205控制文件出错或ora-00227控制文件存在坏块,数据库启动到started状态

3.找到备份的trace文件,并将其中创建控制文件的脚本提取出来createctl.sql


4.执行脚本createctl.sql

SQL>@createctl.sql


三、没有控制文件的备份和trace备份,此时需要手工创建控制文件

1.SQL>shutdown abort

2.SQL>startup

提示错误ora-00205控制文件出错或ora-00227控制文件存在坏块,数据库启动到started状态

3.手工创建控制文件
SQL>create controlfile reuse(/set) database "数据库名" noresetlogs(/resetlogs 仅当online logs损坏的情况下才使用) noarchivelog
    MAXLOGFILES 16  
    MAXLOGMEMBERS 3  
    MAXDATAFILES 100  
    MAXINSTANCES 8  
    MAXLOGHISTORY 4672
LOGFILE  
  GROUP 1 '重做日志1的目录'  SIZE 50M,  
  GROUP 2 '重做日志2的目录'  SIZE 50M,  
  GROUP 3 '重做日志3的目录'  SIZE 50M    
DATAFILE  
  '数据文件目录/system01.dbf',  
  '数据文件目录/undotbs01.dbf',  
  '数据文件目录/sysaux01.dbf',  
  '数据文件目录/users01.dbf',  
  '数据文件目录/info01.dbf' (不包括temp文件)
CHARACTER SET ZHS16GBK  
;  
提示创建成功

4.介质恢复
sql>RECOVER DATABASE  
sql>ALTER DATABASE OPEN;  
sql>ALTER TABLESPACE TEMP ADD TEMPFILE 'temp文件目录/temp01.dbf'  
     SIZE 1244667904  REUSE AUTOEXTEND ON NEXT 655360  MAXSIZE 32767M; 


最后恢复完成后记得备份控制文件
备份控制文件
ALTER DATABASE BACKUP CONTROLFILE TO 'F:\ORACLE\BACKUP\TEST.BAK';
alter database backup controlfile to trace as '目录';--生成创建控制文件的脚本,可通过show parameter user_dump_dest查看。









Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL: Essential Skills for Beginners to MasterMySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AM

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL: Structured Data and Relational DatabasesMySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AM

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL: Key Features and Capabilities ExplainedMySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AM

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

The Purpose of SQL: Interacting with MySQL DatabasesThe Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AM

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

MySQL for Beginners: Getting Started with Database ManagementMySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AM

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

MySQL's Role: Databases in Web ApplicationsMySQL's Role: Databases in Web ApplicationsApr 17, 2025 am 12:23 AM

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

MySQL: Building Your First DatabaseMySQL: Building Your First DatabaseApr 17, 2025 am 12:22 AM

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL: A Beginner-Friendly Approach to Data StorageMySQL: A Beginner-Friendly Approach to Data StorageApr 17, 2025 am 12:21 AM

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Will R.E.P.O. Have Crossplay?
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software