Data Guard备用数据库可以与生产系统位于相同的数据中心,也可以是在地理位置上分布较远的的远程灾难备份中心。1.2 原理Data Guard的基本原理是:当某次事务处理对生产数据库中的数据作出更改时,Oracle 将在联机重做日志文件中记录此次更改。在 Data Guard中,除了把日志记录到本地的联机日志文件和归档日志
oracle dataguard配置说明系统环境 rh linux 6.3oracle 11g物理备库和逻辑备库 物理备库:physical standby, 备库与主数据库完全一样的备份(数据为物理块到块的复制),数据库的表和索引都相同,物理结构是相同的。基于RMAN实现,传输和直接应用redo log来实现。逻辑备库:logical standby ,逻辑备库,standby侧的逻辑信息...
The SGA is a group of shared memory structures, known asSGA components, that contain data and control information for one Oracle Database instance. All server and background processes share the SGA. Examples of data stored in the SGA include cached data blocks and shared SQL areas. Program gl...
SET ECHO Controls whether or not to echo commands that are issued either at the command-line prompt or from a DGMGRL script. SET FAST_START FAILOVER TARGET Sets the fast-start failover target to the named standby database. SET MASTEROBSERVER TO Lets you manually designate which observer is...
startup Starts an Oracle database instance stop Stops the fast-start failover observer switchover Switches roles between a primary and standby database Use"help "to see syntaxforindividual commands 1. 2. 3. 4. 5. 6. 7. 8. 9.
Step 7. Production on SPARC is now ready At the end of execution of all the commands in Set #1, the production database can be opened for users & applications. Note: It is possible that when opening the new Primary you may encounter ORA-07445 errors or other errors indicating that some...
This scenario describes setting up Oracle Data Guard on Oracle Database Appliance using ODACLI commands. EnvironmentUnderstand the primary and standby database environment topologies used in the subsequent Data Guard setup example using Oracle Database Appliance. Configuring Ora...
Data Guard Configuration USING ODACLI Configuring Oracle Data Guard Switchover Failover Deconfigure Data Guard Additional Network Appendix B: Registering Manually Configured Data Guard in DCS Appendix C: Manual Data Guard Configuration On ODA with DCS stack Appendix D: Manual Data Guard Configuration on...
oracle 11g dataguard之dgmgrl 官方参考:https://docs.oracle.com/cd/E11882_01/server.112/e40771/toc.htm http://www.oracle.com/technetwork/cn/tutorials/smiley-fsfo-088047-zhs.html 环境概述:搭好Dataguard,搭建参考:http://blog.51cto.com/snowhill/1923591...
目录1. Data Guard概述. 5 1.1 DG 日志传递模式-图文并茂. 5 2. DG 搭建过程. 6 2.1 主数据检查. 6 2.2 主数据库添加standby redo log 7 2.3 主数据库创建参数文件. 8 2.4 备数据库启动到nomount状态. 8 2.5 主数据库