What is the difference between Oracle RAC and Data Guard?
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What is the difference between Oracle RAC and Data Guard?
Data Guard and RAC both are different and serve different purpose. RAC is multiple instances accessing a single database with key features availability, scalability and manageability. Data Guard software maintains a real time copy of the production database called a standby database.
What is Oracle Data Guard broker?
Oracle Data Guard Broker is a centralized framework that automates the configuration, management, and monitoring of an Oracle Data Guard configuration. Oracle Data Guard Broker further enhances Oracle RAC by providing apply instance failover for Oracle RAC standby databases.
What is single node RAC?
Oracle Real Application Clusters (RAC) One Node is an option to the Oracle Database Enterprise. Edition that was introduced with Oracle Database 11g Release 2. It provides enhanced high availability. for single instance Oracle Databases, protecting them from both, planned and unplanned downtime.
What are the types of data guard?
An Oracle Data Guard configuration can include any combination of these types of standby databases….2.1 Standby Database Types
- 1 Physical Standby Databases. A physical standby database is an exact, block-for-block copy of a primary database.
- 2 Logical Standby Databases.
- 3 Snapshot Standby Databases.
How do I setup a Data Guard broker?
You use the dgmgrl command to create the Oracle Data Guard Broker configuration. You need to know the name of the Oracle Data Guard Broker configuration that you want to create, the name of the primary database, and the net service name through which to connect.
How does Oracle RAC work?
Oracle Real Application Clusters (RAC) allow customers to run a single Oracle Database across multiple servers in order to maximize availability and enable horizontal scalability, while accessing shared storage.
How do I turn off RAC 1 node?
Shutdown one node in RAC
- Shutdown database instance. export ORACLE_SID=mydb1. sqlplus / as sysdba. shutdown immediate;
- shutdown ASM instance. . oraenv. +ASM1. sqlplus / as sysasm. shutdown immediate;
Is Oracle RAC free?
You get an Oracle Database to use in any environment, plus the ability to embed and redistribute – all completely free!
How much does Oracle Data Guard cost?
Pricing for Oracle Data Guard starts at $46 per user per year .
How do I connect to a Data Guard?
Welcome to DGMGRL, type “help” for information. DGMGRL> CONNECT sys; Password: password Connected. This example demonstrates how to connect to the Data Guard (DGMGRL) command-line interface on a remote system. DGMGRL> CONNECT sys@remote-stby; Password: password Connected.
Is Oracle RAC certified on Azure?
Oracle RAC is currently not certified or supported by Oracle on Azure. However, Azure offers features such as Azure offers Availability Zones and planned maintenance windows to help protect against instance-level failures.
