Home Database Mysql Tutorial oracle数据库rman异地恢复

oracle数据库rman异地恢复

Jun 07, 2016 pm 04:35 PM
oracle why recover database first

首先讲下,为什么会遇到这个问题: 自己想做两组rac之间的data guard,由于datafile,controlfile,甚至是archivelog都是存放在asm上的,直接复制数据有点不现实,asm磁盘总归都是要用的,所以想从a库做rman全备份,然后把备份文件拷贝到b库上做rman恢复,初

首先讲下,为什么会遇到这个问题:

自己想做两组rac之间的data guard,由于datafile,controlfile,甚至是archivelog都是存放在asm上的,直接复制数据有点不现实,asm磁盘总归都是要用的,所以想从a库做rman全备份,然后把备份文件拷贝到b库上做rman恢复,初衷就是这么简单,结果却遇到了n多的折腾,无法实现,下面是我自己经过无数次测试得到的方法。

oracle版本:11.2.0.0

第一组RAC A ?PS:前面的hostname,冒号后面是instancename
rac1:orcl1
rac2:orcl2
rac3:orcl3

第二组RAC B
rac8:orcl1
rac9:orcl2

我已经创建好了两组rac,并且在上面分别创建了orcl数据库,我在A组rac的数据库里做了一些操作,我希望这些新建的表数据什么的在RAC B上也同样出现,我现在要做的就是在rac1上使用rman做数据库全备份然后把备份文件拷贝到rac8上,然后做rman恢复,使得rac8是rac1上oracle数据库的一个拷贝

1、rac1做rman全备份

登录到rac1上,使用rman全备份数据库,如下:
[oracle@rac1 ~]$ rman target /
RMAN> backup database format ‘/u01/app/oracle/backup/orcl01.dbf’;
备份成功了会告诉我:
数据文件备份文件为/u01/app/oracle/backup/orcl01.dbf’
controlfile,spfile备份文件为/u01/app/oracle/backup/c-1351646173-20130822-00
注意:我这边加了format参数备份成我指定的文件路径和名称,原因就是在异地恢复的时候,rman读取备份文件的目录和需要和备份时的目录一致,如果这边不使用format,备份到默认的asm磁盘上,则备份文件想要复制到异地的asm磁盘上有一定的难度,比如我遇到的问题就是默认备份到asm上的文件名称参数很长无法复制到异地的asm磁盘上

2、从rac1上拷贝备份文件到rac8

需要拷贝的文件如上:
数据文件备份文件为/u01/app/oracle/backup/orcl01.dbf’
controlfile,spfile备份文件为/u01/app/oracle/backup/c-1351646173-20130822-00
拷贝到rac8上之后仍然放在相同的路径下,设置具有相同的权限,一般是oracle:oinstall权限

3、rac8上做rman恢复

我们这边只需要恢复controlfile和datafile。

按理来说备份恢复应该使用一样的spfile,但是我们看到A组rac是3个节点,B组rac是2个节点,我这里还要说的是这两组rac server的配置是有差异的,spfile中定义了节点的信息,还定义了相关的初始化信息,A组RAC的这些信息在B组上并不适用的,所以我这里只恢复controlfile和datafile。

网上看到说异地rman恢复需要设置异地的dbid为本地的值,折腾了好久,发现这个是不需要的,dbid已经定义在controlfile当中,只要恢复了controlfile,dbid自然是相同的了。

恢复controlfile需要数据库置于nomount状态
[oracle@rac8 ~]$ uniread sqlplus ‘/ as sysdba’
SQL> shutdown immediate;
SQL> shutdown nomount;
[oracle@rac8 ~]$ uniread rman target /
RMAN> restore controlfile from ‘/u01/app/oracle/backup/c-1351646173-20130822-00′;
完了会告诉你恢复成功

恢复数据文件需要数据库置于mount状态
[oracle@rac8 ~]$ uniread sqlplus ‘/ as sysdba’
SQL> shutdown immediate;
SQL> shutdown mount;
注意:启动到mount的状态可能需要加参数resetlogs
[oracle@rac8 ~]$ uniread rman target /
RMAN> list backup of database;
可以看到备份文件信息
RMAN> restore database;
RMAN> recover database;
这样就恢复结束了

4、rac8上启动oracle到open状态

单独讲这个是有意义的,恢复之后,因为rac8上的数据字典等信息已经改变,所有他会报错ORA-39700: database must be opened with UPGRADE option
那我们就需要启动到升级模式了
SQL> startup?UPGRADE;
报错:ORA-39701: database must be mounted EXCLUSIVE for UPGRADE or DOWNGRADE
这个报错的解决方法是要禁掉集群参数
SQL> STARTUP NOMOUNT;
SQL> ALTER SYSTEM SET CLUSTER_DATABASE=FALSE scope=spfile ;
SQL> SHUTDOWN IMMEDIATE;
SQL> startup?UPGRADE;
这样就启动成功了,再有就是记得把集群参数开启。

?

无觅相关文章插件,快速提升流量

Statement of this Website
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

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)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Two Point Museum: All Exhibits And Where To Find Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How long will Oracle database logs be kept? How long will Oracle database logs be kept? May 10, 2024 am 03:27 AM

The retention period of Oracle database logs depends on the log type and configuration, including: Redo logs: determined by the maximum size configured with the "LOG_ARCHIVE_DEST" parameter. Archived redo logs: Determined by the maximum size configured by the "DB_RECOVERY_FILE_DEST_SIZE" parameter. Online redo logs: not archived, lost when the database is restarted, and the retention period is consistent with the instance running time. Audit log: Configured by the "AUDIT_TRAIL" parameter, retained for 30 days by default.

How much memory does oracle require? How much memory does oracle require? May 10, 2024 am 04:12 AM

The amount of memory required by Oracle depends on database size, activity level, and required performance level: for storing data buffers, index buffers, executing SQL statements, and managing the data dictionary cache. The exact amount is affected by database size, activity level, and required performance level. Best practices include setting the appropriate SGA size, sizing SGA components, using AMM, and monitoring memory usage.

Oracle database server hardware configuration requirements Oracle database server hardware configuration requirements May 10, 2024 am 04:00 AM

Oracle database server hardware configuration requirements: Processor: multi-core, with a main frequency of at least 2.5 GHz. For large databases, 32 cores or more are recommended. Memory: At least 8GB for small databases, 16-64GB for medium sizes, up to 512GB or more for large databases or heavy workloads. Storage: SSD or NVMe disks, RAID arrays for redundancy and performance. Network: High-speed network (10GbE or higher), dedicated network card, low-latency network. Others: Stable power supply, redundant components, compatible operating system and software, heat dissipation and cooling system.

How much memory is needed to use oracle database How much memory is needed to use oracle database May 10, 2024 am 03:42 AM

The amount of memory required for an Oracle database depends on the database size, workload type, and number of concurrent users. General recommendations: Small databases: 16-32 GB, Medium databases: 32-64 GB, Large databases: 64 GB or more. Other factors to consider include database version, memory optimization options, virtualization, and best practices (monitor memory usage, adjust allocations).

Oracle scheduled tasks execute the creation step once a day Oracle scheduled tasks execute the creation step once a day May 10, 2024 am 03:03 AM

To create a scheduled task in Oracle that executes once a day, you need to perform the following three steps: Create a job. Add a subjob to the job and set its schedule expression to "INTERVAL 1 DAY". Enable the job.

iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos Jul 18, 2024 am 05:48 AM

Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps

Detailed tutorial on establishing a database connection using MySQLi in PHP Detailed tutorial on establishing a database connection using MySQLi in PHP Jun 04, 2024 pm 01:42 PM

How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())

How to start the listening program in oracle How to start the listening program in oracle May 10, 2024 am 03:12 AM

Oracle listeners are used to manage client connection requests. Startup steps include: Log in to the Oracle instance. Find the listener configuration. Use the lsnrctl start command to start the listener. Use the lsnrctl status command to verify startup.

See all articles