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Concepts
ORACLE
ORACLE is a large-scale relational database based on advanced Structured Query Language (SQL). It is a set of regular data manipulation in a language that facilitates logical management. It is one of the databases in the CLIENT/SERVER architecture.
Advanced Replication
What is
by the response mechanism, and the data transfer is not considered until the confirmation message is received, otherwise the transfer of the information will be automatically transferred, thus ensuring that all the extracted data can be sent to the backup side. The data transmission process supports both the encryption and compression functions.
Oracle Data Guard provides the most effective and comprehensive data availability, data protection, and disaster recovery solutions for enterprise databases. It integrates management, monitoring, and automated software infrastructure to create and maintain one or more
OriginRecent 10g and 11g physical standby configuration experiments found that Data Guard is actually easy, but lacks good documentation. I was experimenting with the official documentation and thought it wasn't very clear.Google out of two PDF documents, read it feel much stronger than official documents. It may be useful for some friends to translate. I am also better acquainted with these two documents w
Distributed replicated Block Device (DRBD) is a software-free, shared-sharing, storage-replication solution that mirrors the contents of a piece of equipment between servers.
Data mirroring: Real-time, transparent, synchronous (returned after all successful servers), asynchronous (returned after the local server succeeds)
DRBD's core functionality is implemente
Some things really need to be used constantly before they can be better remembered. Let's talk about data guard. I checked concepts several times, I can see Data guard related content on the Internet every other time. The concept in my mind has become blurred and there are still too few practices. Today, I simply wrote
database to the control file. Note: The STANDBY_FILE_MANAGEMENT initialization parameter must be set to MANUAL.SQL> ALTER DATABASE RENAME FILE '/disk1/oracle/oradata/payroll/tbs_4.dbf' 2> TO '/disk1/oracle/oradata/payroll/tbs_x.dbf ';
On the standby database, restart Redo Apply:9. Restart the redo application in the slave database:SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE2> DISCONNECT FROM SESS
Oracle Data Guard provides the most effective and comprehensive Data availability, Data protection, and disaster recovery solutions for enterprise databases. It integrates management, monitoring, and automated software infrastructure to create and maintain one or more
in the Oracle Data Guard configuration. See ' performance Versus Protection in Maximum availability Mode ' For information about the Redo transport settings NEC Essary to support Maximum availability and associated trade-offs. Transactions on the primary is considered protected as soon as Oracle
Tags: database oracle Standby databases activeA data guard configuration consists of a production library and one or more standby databases, in the data guard configuration, both the primary and standby environments can be either RAC or standalone.This article mainly introdu
Oracle Data Guard is an important configuration parameter. Oracle Data Guard provides one or more backup databases for the production database (a copy of the database ), to ensure that data
Setting up MYSQL Data synchronization
MySQL provides database replication functionality after version 3.23.15. The function of two database synchronization, master-slave mode and mutual backup mode can be realized by this feature.
The settings for database synchronization replication are reflected in the MySQL settings file. MySQL's configuration file (typically
), this function is similar to the function of querying read-only standby databases when redo logs are being applied in real time. It provides an optional solution for the read-only data warehouse to use basic replication.
But there is an important exception:
There is no way to deal with any significant delay in redo logs on the physical standby database. Oracle
Tags: is technology sharing images session learning notes es2017 physical standby Sele 1.5DG is a backup recovery tool, but more strictly the meaning of it is disaster recovery Data Guard is a collection of one primary database and one or more standby databases, divided into two classes of logical standby and physical standby 10.2.1 preparation of physical standb before creation Whether it is physical stan
Tags: 11.2 mysql tab arch scope show error not docRecently in the customer site to build a disaster tolerance environment, found that encountered a bug, in the case can not be resolved, give up the broker, can still achieve adg,oracle can't realize the dual-master, but MySQL can ha. The official website says to record a bit.OERR: ORA-16597 "Oracle Data
The Oracle installation and configuration process is closely related to the operating system, storage, and network. Especially in Linux and AIX environments, the configuration process is relatively complex. A link error may cause a series of faults in the future.In addition, the steps and methods for executing the same installation project vary greatly with the Oracle version. For example,
Oracle Active Data Guard adjustment case [2]
The customer's Oracle 11gR2 Active Data Guard environment, the master database's standby_file_management = AUTO, the Standby database's standby_file_management = MANUAL, resulting in th
configuration file implementations, back to the primary database. The SQL configuration file implemented on the primary database is recommended to be applied to the ADG standby database using the Redo application mechanism.For more new features, please click :Oracle 12.2 New features handheld handbook-Performance and Diagnostics for volume sixth ADGDeploying Columnstore on ADGWe are doomed to lose the people we love, otherwise how do we know how impo
meaningless if there is an interruption in the connection between the primary and standby libraries. The value of the Datum_time column corresponding to the transport lag, apply lag, if not changed, indicates that they have not been updated and is meaningless, possibly due to an interruption in communication between the primary and standby libraries.1.1.3SwitchoverSwitchover is typically used to reduce the downtime of the main library during planned outages, such as upgrades to the operating sy
Oracle Data Guard provides one or more slave databases for the production database (a copy of the database ), to ensure that data is not lost when the master database is unavailable or when exceptions occur, and continue to provide services through the slave database. For the configuration of
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