Oracle ADG使用这个强大的自动数据库群组（oracle adg全名）

Oracle ADG: Using This Powerful Automated Database Group

Oracle ADG (Active Data Guard) is a feature of Oracle Database that allows you to automatically create and manage database replicas. Using ADG, you can create a group of databases that work together to provide high avlability and disaster recovery for your critical data.

To use Oracle ADG, you need to have Oracle Database Enterprise Edition installed on your system. You also need to have a license for the feature, which is included in the Enterprise Edition license.

To set up an ADG group, you first need to create a primary database instance. This instance serves as the master copy of your data. You then create one or more standby database instances that replicate the data from the primary instance. These standby instances can be configured to be either synchronous or asynchronous, depending on your needs.

Once you have set up your ADG group, you can use it to perform a variety of tasks. For example, you can use ADG to:

– Provide high avlability: If your primary database instance fls, ADG can automatically switch over to a standby instance, minimizing downtime and ensuring that your applications continue to run smoothly.

– Perform mntenance and upgrades: With ADG, you can perform mntenance and upgrades on your standby instances without impacting your primary instance. Once the upgrades are complete, you can switch back to the primary instance.

– Provide disaster recovery: If your primary data center is destroyed or suffers a catastrophic flure, you can use ADG to recover your data quickly and easily.

The benefits of using Oracle ADG are many. For one, you can ensure that your critical data is always avlable, even in the face of hardware or software flures. Additionally, ADG provides a convenient way to perform mntenance and upgrades without any downtime. Finally, ADG ensures that you have a robust disaster recovery plan in place should the worst happen.

Here’s an example of how to create an ADG group using SQLPlus:

1. Create a new primary database instance:

CREATE DATABASE adg_primary

2. Create one or more standby instances:

CREATE DATABASE adg_standby1

CREATE DATABASE adg_standby2

3. Configure the standby instances to replicate data from the primary instance:

ALTER SYSTEM SET LOG_ARCHIVE_DEST_2= ‘SERVICE=adg_primary ARCH SYNC NOAFFIRM’

4. Start the replication process:

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT;

5. Verify that the ADG group is running correctly:

SELECT name, database_role, open_mode, protection_mode FROM v$database;

Using this simple process, you can create and manage your Oracle ADG group with ease. Whether you’re looking for high avlability, disaster recovery, or just a convenient way to perform mntenance and upgrades, Oracle ADG is an essential tool for any enterprise-level database deployment.