How many standby databases can we create?
We can create with Oracle 11g R2 30 redundant databases.
What is an Oracle standby database?
There is a standby database database replica created from a backup of the primary database. By applying archived redo logs from the primary database to the standby database, you can keep both databases in sync. The main purposes of the standby database are: Failure protection. Protection against data corruption.
How to create a standby database in Oracle 12c?
Perform the following tasks on the primary database to prepare for the physical creation of the standby database:
What’s the difference between Oracle RAC and data protection?
What’s the difference between Oracle RAC and Data Guard? RAC has one database and several associated instancesbut Data Guard has several databases (one primary and the other standby). RAC is the recommended solution in the event of software and hardware failure, for example. … A RAC can have a maximum of 100 nodes.
How many data keepers are there in Oracle?
In the case of Oracle 11g Release 2, a single Oracle Data Guard configuration can contain up to 30 standby databases in 3 standby database configurations: physical, snapshot and logical. Everything three kinds standby databases can be Oracle RAC or a single instance, regardless of the configuration of the primary database.
What is the Active Reserve database?
The backup database is an exact binary copy of the operational database on a remote serverready to use for backup, replication, disaster recovery, analysis, shadow environment and reporting, to name a few.
Why do we need Oracle RAC?
The main purpose of Oracle RAC is: implementation of a clustered database to ensure performance, scalability, resilience, and high data availability at the instance level.
What is Oracle RAC for?
Oracle True Application Clusters (RAC) enable customers to run one Oracle database on multiple servers to maximize availability and enable horizontal scalabilitywhen accessing shared memory.
What is a physical standby database?
There is a physical standby database exact, block to block copy of the underlying database. The physical fallback is kept as an exact copy in a process called Redo Apply, where the retry data received from the primary database is continuously applied to the physical fallback database using database recovery mechanisms.
What is a snapshot fallback database?
What is a snapshot backup database? The database is on standby for taking snapshots a fully updatable standby database created by converting a physical standby database to a standby snapshot database. Snapshot standby database receives and archives, but does not reuse, data from the primary database.
How many reserve databases can we create in 12c?
thirty standby databases The standby database is a transactionally consistent copy of the primary database. By using a primary database backup, you can create to thirty standby databases and include them in Oracle Data Guard configuration.
What is a standby database in Oracle 11g?
Data Guard is the name of Oracle’s fallback database solution used for disaster recovery and high availability. You should probably use the Data Guard broker to set up and manage the standby database as described here. …
What is database retry?
A retry record, also known as a retry entry, consists of a group of change vectors, each of which describes a change made to a single block in the database. … Retry entries data that you can use to reconstruct all changes made to the databaseincluding retraction segments.
What are partitions in Oracle?
Partitioning is a powerful feature that breaks tables, indexes, and index-organized tables into smaller partsallowing you to manage and access these database objects at a higher level of detail.
What is AWS RDS for Oracle?
Amazon RDS for Oracle include fully managed commercial database which makes it easier to configure, operate and scale Oracle deployments in the cloud. … You can run Amazon RDS for Oracle under two different licensing models – “License Included” and “Bring-Your-Own-License (BYOL)”.
How do I create a readiness check file?
To create a standby database control file:
How to mount a standby database?
To open a read-only standby database while it is currently closed:
What are Fal_server and Fal_client in Data Guard?
Answer: Fal_server and fal_client are including. ora parameters are used for the resolution of the gap. … Fal_client specifies the name of the FAL client (get log archive) that is used by the FAL service, configured with the fal_server initialization parameter, to refer to the FAL client.