dataguard

Oracle DataGuard Study--dataguard failover caseOracle DG (Dataguard) is now a common database ha configuration policy. By implementing physical Standby and logical Standby, the data redundancy tolerance mechanism can be realized. There is no fast backup support environment when there is a major failure in the main library and no support for the service. in Dg sw

Prior to Oracle 11g, the database needed to be in the Mount state when the physical repository (physical Standby) applied Redo. Starting from 11g, when applying redo, physical repositories can be in read-only mode, which is called Active Data Guard, which can realize real-time query function. 1. operation on standby Library 1) View the current status of the standby mount Sql> select Open_mode,database_role,db_unique_name from V$database; Open_mode Database_role Db_unique_name --------------

Tags: log nbsp Data function log archive test data check RAC archive logs1. Check the master standby sync status2. Turn on the flash back function and flash back directory of the standby library3. Cancel the recovery process for the repository4. Create a restore point for the standby library5. Archive logs in the main library6. Confirm that the repository has archived the latest logs7. Delay point to the log archive destination for the backup that will be activated8. Activating the Standby Libra

The oracle Dataguard is the Oracle's own data synchronization feature that transfers log files from the original database to the target database and then applies the log files on the target database, keeping the target database synchronized with the source database. is a database-level high availability scenario. dataguard can provide Oracle database redundancy, data protection, failure recovery, and so on

Tags: Ada CTI Company snap log compare archive buffer disaster preparednessOracle database is still at the forefront of commercial databases. The security of the core business and core data running on the Oracle database is particularly important. There are generally two broad categories of disaster recovery products that are common to Oracle databases on the market. Oracle's own disaster-tolerant products Disaster-tolerant products for non-Oracle Companies Oracle's current d

Dataguard can provide redundancy of Oracle database, data protection, fault recovery and so on, realize fast handover and disaster recovery of database. When the production database is guaranteed transactional consistency, a standby database is created using a physical full backup of the production library, which is automatically maintained by an archive log or redo entry that is transferred from the production library.

After half a month of Oracle Dataguard physical repository configuration and learning, although the version uses Oracle 11g (11.2.0.3), the configuration process still applies to Oracle 10g. In the process of nearly 10 dataguard configuration, it is found that it is very convenient and fast to create the physical repository using the Rman duplicate method. Gradually will not go to use the cold standby way t

Oracle Dataguard Normal switchover and emergency switchingOracle Dataguard offers offsite disaster recovery solutions that can effectively prevent single points of failure and provide highly available technology, which describes dataguard normal primary and standby switching and emergency switching (emergency switching analog main library problems can not be rest

When deploying Dataguard, the simplest scenario is that the primary/standby node configuration is identical. However, there are times when deployments can happen on heterogeneous operating systems to allow for minimal downtime or risk of data migration from heterogeneous platforms. It is also a complete solution for users to reduce their investment in disaster preparedness by configuring heterogeneous processing power or a backup system with lower har

Oracle Dataguard normal switching and emergency switching Oracle Dataguard provides disaster-tolerant solutions that can effectively prevent single points of failure and provide highly available technology, here is a description of the Dataguard normal main-standby switch and emergency switching (emergency switching simulation Master library problems cannot b

Db_unique_name Defines the unique name of the database, because the db_name parameter must be the same for the physical database and must be different for the logical database, so the Db_unique_name parameter is introduced in Oracle 10g to determine each database in the Dataguard configuration, if it is not defined, The db_name parameter value is used by default. Log_archive_config Defines a valid db_unique_name parameter list for a

is made up of two computers and a shared storage device, which can be switched through third-party software (HA rose, etc.) without the need for data synchronization It is recommended to apply Rac+dataguard, RAC guarantees availability, Dataguard on the RAC group stand-alone disk and on another host, ensuring reliability. Double machine is what people call the dual-machine hot standby, the database on the

Dataguard provides support for high availability of enterprise data, data security, and disaster recovery, typically consisting of a dataguard configuration of a primary db with several physical or logical standby db.System environmentOperating system for Windows Server 2003 R2 Enterprise x64 Edition Service Pack 2,database for Oracle 10g 10.2.0.4 Enterprise x64 Edition. The server is AMD64 architecture, ho

Enable encryption for Dataguard's Redo TransportFrom:Enabling encryption for Data Guard Redo Transport (document ID 749947.1)Suitable for:Oracle database-enterprise edition-version 10.2.0.1 to 11.2.0.3 [Release 10.2 to 11.2]Information in this document applies to any platform.Checked for relevance on 08-may-2013***Reviewed for relevance 16-jul-2015 * * *Objective:This article describes the use of advanced security options to enable encryption for Dataguard