dataguard oracle

When the hardware is maintained, someone accidentally disconnected the power supply from the production library, and after restarting the enclosure and server, an Oracle 10g 10.2.0.4 startup error message appears: The code is as follows Copy Code Database loading complete.ORA-01122: Database file 1 validation failedORA-01110: Data file 1: ' E:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\

Oracle [Oracle] History of the Oracle ――oracle company legend Author: fenng Date: Sep 09 2004 The origins of Oracle Company It is hard to imagine the Oracle Company's saga starting with IBM. 1970 June, IBM researcher Edgar Caut

versions of the 08.Oracle RAC cluster technology This course address: http://edu.51cto.com/course/10057.html 650) this.width=650; "Src=" https://s2.51cto.com/wyfs02/M00/98/99/wKioL1k-f2KiT9s4AAFWwLbqNN4078.jpg-wh_500x0-wm_ 3-wmp_4-s_3829977401.jpg "title=" RAC Architecture "alt=" Wkiol1k-f2kit9s4aafwwlbqnn4078.jpg-wh_50 "/>Second, pre-class preview Oracle Database Basics Introductory Tra

system to maintain data consistency and sequential recovery of important signs. Four, in-depth study management: You can test OCP certificate, Oracle First have a systematic study, and then look at Oracle Concepts, Oracle online document, Oracle will have a better understanding of the principles, At the same time, w

Oracle Database-based data synchronization technology can be divided into two types: data synchronization technology provided by Oracle itself and data synchronization technology provided by third-party vendors. Oracle's own synchronization technologies include DataGuard, Streams, Advanced Replication, and a recently acquired data synchronization software called

According to the official oracle documentation, the oracle 11g replicuard can also apply redo in the open state on the physical standby machine, so it was tested locally, in this way, both redo and Data Query and Database Backup can be applied. it not only solves data disaster tolerance but also solves the pressure on the primary database. Introduction to Oracle

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Step 1 Verify that the primary database can be switched to the standby role.Verify that the master database can switch to the slave role.SELECT SWITCHOVER_STATUS from v $ DATABASE;Idle>: wq SWITCHOVER_STATUS--------------------TO STANDBY Step 2

Opening the main and standby libraries correctly 1 Main Library: SQL> STARTUP MOUNT; SQL> ALTER DATABASE ARCHIVELOG; SQL> ALTER DATABASE OPEN; 2 Reserve Library: SQL> STARTUP MOUNT; SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT

. SCN (System ChangeNumber): System Change number, a serial number maintained by the System. It is automatically added when the system needs to be updated. It is an important indicator of maintaining data consistency and sequential recovery in the system. 4. Deep Learning Management: You can take an examination of the OCP certificate. First, you can have a system for Oracle, and then read Oracle Concepts an

no migrationutility (script or dbua) to perform a cross platform migration of an oracledatabase. -- There are no migration tools such as scripts or dbua to perform cross-OS data migration. Changingplatforms requires the database be re-built and/or the data moved using oneof the following methods: -- For cross-platform migration, You need to recreate the database, and then use the following method to complete data migration. (1) Export/Import to include theuse of DataPump facilities. All Versio

Oracle diagnosis and Optimization3) Configure your first monitoring4) diagnose your first problem (idea-method) 5) Use em to view your monitoring and report 　 Each step above contains a lot of knowledge points (I just listed a rough one, because I just saw a puber asking a similar question, so I wrote a little at will ), if you can keep learning these things completely, you will basically have the basic knowledge of getting started. Next, you need to

Tags: http io ar using SP for on file dataThe problem to the machine environment:Oracle 11gR2 64bitNavicat for Oracle 11.0.10According to the practices of some of the great gods on the internet and some of the personal speculations, the following are summarized:The problem occurs because the navicat is inconsistent with the number of bits of Oracle, the former 32bit, the latter 64bitSome of the online pract

re-installed on the new nodes, patching is also simplified-only one Oracle Home Directory needs to be patched. However, patches cannot be installed in rolling mode, so the downtime is inevitable. During the installation process, Oracle universal installer will remind the Administrator to install or upgrade the database, or install only the software. If a new version is released during installation, it is b

system (for example, OCFS2 or ACFS), and adding new nodes to the cluster is simplified because the software does not need to be reinstalled on the new node. Patching is also simplified-only one Oracle home directory needs to be patched. But patches cannot be installed in rolling, so downtime is unavoidable. During the installation, Oracle Universal installer will alert the administrator to install or upgra

DataGuard : are you familiar with Oracle?everyone: that's pretty familiar.Small: OK, then we do not talk about the basics today, straight into the topic! The child who does not have a class goes back to mend.Today's topics include:Performance and diagnosis of ADG in 12.2Deploying Columnstore on ADGDG Cross-Platform migrationDG Data RecoveryDG's archive ManagementPerformance and diagnosis of ADG in 12.2In

Shengge's 1.1-bit explanation of previous lives and life of yunuard Note: More details can be found ~ 116page from birth-out of Division full lifecycle DG edition [departure table] Introduction: Ora .. Shengge's 1.1-bit explanation of previous

LGWR and affrem, the log writing process synchronously writes REDODATA to the DISK. before writing the DISK, the control is not handed over to the user, and the online logs of the master database may not be used before archiving. LGWR and affrem,

Application Services Apply ServicesOrganized according to Oracle official documentationhttp://docs.oracle.com/cd/E11882_01/server.112/e25608/log_apply.htm#i1027052Apply Services automatically applied from the library Redo to achieve Primary and the

system (for example, OCFS2 or ACFS), and adding new nodes to the cluster is simplified because the software does not need to be reinstalled on the new node. Patching is also simplified-only one Oracle home directory needs to be patched. But patches cannot be installed in rolling, so downtime is unavoidable. During the installation, Oracle Universal installer will alert the administrator to install or upgra