oracle data guard synchronous replication

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Oracle] Data Guard Analysis of Switchover and Failover

The following is a detailed analysis of the use of Switchover and Failover in Oracle. For more information, see Role Switching between Data Guard master and slave databases is divided into the following two types:1) SwitchoverSwithchover is generally designed to switch roles, such as upgrading. It is usually lossless, that is, there will be no

[Oracle] Data Guard-Redo Application

[Oracle] Data Guard-Redo applications physical Standby and logical Standby Log application services are divided into two types, one is physical Standby Redo applications, similar to media recovery, its advantage is that the speed is fast, but in 10g cases, Standby must be in the mount State and cannot share part of the read load for Primary (physical Standby can

Oracle] Introduction to three Protection modes of Data Guard

Data Guard provides the following three Data protection modes: Data Guard provides the following three Data protection modes: 1) Maximum Protection)The "maximum protection" here refers to protecting

Oracle Data Guard Learning (1) Three protection modes

The data guard provides the following three kinds of protection modes: 1 Maximum protection mode (Maximum Protection) "Maximum protection" here means that the maximum protection data is not lost, that is, at least one standby and primary maintain real-time synchronization, but this is costly, because as long as a transaction is committed, not only to write to t

Introduction to the three protection modes of Oracle] Data Guard

Data Guard provides the following three kinds of protection mode, the following is a detailed analysis of the three protection modes, the need for friends can refer to the next The data guard provides the following three kinds of protection modes: 1 Maximum protection mode (Maximum Protection)"Maximum protection" her

Oracle DG ERROR: Ora-16057:dgid from server not in Data Guard configuration

After the DG is set up, it is found that the repository does not accept logs from the main library.Executing in the main librarySelect dest_id,status,error from V$archive_dest where dest_id=3;Report: Ora-16057:dgid from server not in Data Guard configurationThe meaning of the error is obvious, Log_archive_config is not configuredBut I've configured it in the main library.alter system set Log_archive_config

Oracle Data Guard (4) Failover

Oracle Data Guard (iv) Failover 1. check for missing logs in the Standby database. Run the following command to check for missing logs: SQL> select thread #, log_sequence #, high_sequence # from v $ archive_gap; copy the missing log file from the primary database to the log directory specified by the standby database, and run the following command to register it

Oracle Data Guard master database archive deletion policy

  To delete an archive file of the master database in the Maximum Availability and Maximum Performance modes of Oracle Data Guard, the archive file must be deleted after the backup database is applied.   For Maximum Protection mode, logs in this mode are written to the master database and the slave database at the same time. Therefore, in this mode, there is no l

[Oracle] Introduction to three Data Guard protection Modes

Data Guard provides the following three Data protection modes: 1) Maximum Protection)The "maximum protection" here refers to protecting data from loss to the maximum extent, that is, at least one standby and primary are synchronized in real time, but this is costly, that is, when a transaction is committed, it should n

[Oracle] Data Guard Analysis of Switchover and Failover

Role Switching between Data Guard master and slave databases is divided into the following two types:1) SwitchoverSwithchover is generally designed to switch roles, such as upgrading. It is usually lossless, that is, there will be no data loss.Its execution is divided into two phases:1. convert Primary to Standby2. Convert Standby (one) to Primary2) FailoverFailo

[Oracle] Analysis of Data Guard switchover and Failover_oracle

The role switching between Data guard master and subordinate libraries is divided into the following two kinds:1) SwitchoverSwithchover are usually artificial and planned for role swaps, such as upgrades. It is usually lossless, that is, there will be no loss of data. its implementation is mainly divided into two stages:1.Primary Switch to Standby2.Standby (one)

Oracle Data Guard Learning (5) Creating a logical repository

Before you can create a logical repository, you must first create a physical repository, and for how to create a physical library, refer to the Data Guard series (4)-Creating a physical repository without stopping the main library. 1. Stop the Log Application service on the physical repository sys@jkka> ALTER database RECOVER MANAGED STANDBY database CANCEL; Database altered. 2. Reset the main

[Oracle] Introduction of three protection modes of Data Guard _oracle

The data guard provides the following three kinds of protection modes: 1 Maximum protection mode (Maximum Protection)"Maximum protection" here refers to the maximum protection of the data is not lost, that is, at least one standby and primary maintain real-time synchronization, but this is costly, that is, when a transaction is committed, not only to write to th

Oracle 10 Gb single-instance database data guard logical standby configuration details (according to the official documents)

a dictionary in the redo dataTo build dictionary in the redo data, you must enable the logminer at first.Issuing the following statement when the primary database is in the open state:04:59:50 SQL> alter database add Supplemental log data;If you do not run the command above to enable the logminer, the alter database recover to logical standby cuuo will never end up even if you run;Execute dbms_logstdby.bui

Manual management of data files in Oracle via guard

/standby/system01.dbf /data/oradata/standby/undotbs01.dbf /data/oradata/standby/sysaux01.dbf /data/oradata/standby/users01.dbf /data/oradata/standby/test01.dbf Sql> Show Parameter Standby_file NAME TYPE VALUE ------------------------------- ----------- ------------------------------ Standby_file_management stri

Oracle Data Guard _ Delete tablespace in the master database

set to MANUAL or AUTO: Drop the tablespace from the primary database:1. delete a tablespace from the master databaseSQL> drop tablespace tbs_4; SQL> ALTER SYSTEM SWITCH LOGFILE; Make sure that Redo Apply is running (so that the change is applied to the standby database). If the following query returns the MRP or MRP0 process, Redo Apply is running.Make sure that the redo application is running, so that the slave database will apply these changes. If the MRP or MRP0 process returned by the f

Oracle Data Guard _ starts and closes a physical standby Database

When the application redo log is started, the redo log is canceled when the application is disabled:8.1 Starting Up and Shutting Down a Physical Standby Database This section describes the SQL * Plus statements used to start up and shut down a physical standby database.8.1.1Starting Up a Physical Standby Database8.1.1 start the Physical Standby Database To start a physical standby database, use SQL * Plus to connect to the database with administrator privileges, and then use either the SQL * Plu

Oracle Distributed System Data Replication Technology

database to another or multiple physical sites to maintain consistency between the source database and the specified data in the target database. Based on the Real-time Data replication, data replication can be divided into synchronous

Oracle cross-database query replication table data distributed query, oracle

Oracle cross-database query replication table data distributed query, oracle Method 1: Currently, most databases require distributed queries. The following describes how to configure cross-database access in oracle. For example, there are two database servers and two databas

Oracle cross-database query replication table data distributed query introduction, oracle

Oracle cross-database query replication table data distributed query introduction, oracle Method 1: Currently, most databases require distributed queries. The following describes how to configure cross-database access in oracle.For example, there are two database servers and two databases are installed. Database server

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