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| Topic |
Details |
| Topic 1 |
- Performing Role Transitions: Here, the concept of database roles is explained, along with the steps for performing switchovers, failovers, and maintaining physical standby sessions during role transitions.
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| Topic 2 |
- Using Flashback Database in a Data Guard Configuration: This topic covers the configuration and advantages of using Flashback Database in a Data Guard setup, as well as the process of enabling fast-start failover for seamless role changes.
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| Topic 3 |
- Creating a Logical Standby Database: This topic guides users through the process of creating and managing a logical standby database, including SQL Apply filtering.
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| Topic 4 |
- Monitoring a Data Guard Broker Configuration: The topic covers the use of Enterprise Manager and DGMGRL to monitor Data Guard configurations and explains the various data protection modes available.
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| Topic 6 |
- Oracle Data Guard Basics: This topic covers the essential architecture and concepts of Oracle Data Guard. It includes sub-topics such as the physical and logical standby database comparison, benefits of Data Guard, and its integration with multi-tenant databases.
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| Topic 7 |
- Oracle Data Guard Broker Basics: An overview of the Data Guard broker, its architecture, components, benefits, and configurations, is provided here. It serves as an introduction to the tool used for managing Data Guard configurations.
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| Topic 9 |
- Patching and Upgrading Databases in a Data Guard Configuration: This section provides guidance on patching and upgrading databases in a Data Guard environment, along with performance optimization techniques and monitoring considerations.
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Oracle Database 19c: Data Guard Administration Sample Questions (Q40-Q45):
NEW QUESTION # 40
Which FOUR database parameters might be affected by or influence the creation of standby databases?
- A. STANDBY_ARCHIVE_DEST
- B. COMPATIBLE
- C. ARCHIVE_LAG_TARGET
- D. db_file_name_convert
- E. DB_NAME
- F. FALSERVER
Answer: A,B,D,E
Explanation:
DB_NAME (A): The name of the database, which should remain consistent across the primary and standby databases.
db_file_name_convert (C): This parameter helps define the mapping of data file names from the primary to the standby database, which is crucial during the creation and operation of a standby database.
COMPATIBLE (D): The compatibility level can influence the features that can be used on the standby database and must be consistent with or higher than that of the primary database, especially after upgrades.
STANDBY_ARCHIVE_DEST (F): This parameter specifies the destination of archived redo log files on the standby database, which is important for log transport and apply services.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database Reference
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NEW QUESTION # 41
Which three actions are performed by the START PLAN procedure of the DBMS ROLLING package?
- A. creating a guaranteed restore point on the standby databases
- B. building a LogMiner dictionary on the primary database instance
- C. switching the primary database to the logical standby role
- D. creating a guaranteed restore point on the primary database
- E. starting media recovery on all the Leading Group Standby databases
- F. converting the designated physical standby database into a logical standby database
Answer: A,B,D
Explanation:
The DBMS_ROLLING package facilitates a rolling upgrade process across a Data Guard configuration. The START PLAN procedure in particular handles several critical actions, including:
* Creating a guaranteed restore point on the standby databases (B): This ensures that the standby databases can be reverted to their state before the rolling upgrade process in case of any issues.
* Building a LogMiner dictionary on the primary database instance (C): This is necessary for logical standby databases to interpret redo data during the SQL Apply process.
* Creating a guaranteed restore point on the primary database (D): Similar to the standby databases, this ensures that the primary database can be reverted to a known good state if necessary.References:
* Oracle Database PL/SQL Packages and Types Reference
* Oracle Data Guard Concepts and Administration Guide
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NEW QUESTION # 42
Examine the Data Guard configuration:
DGMGRL> show configuration;
Configuration - Animals
Protection Mode: Max Availability
Databases:
dogs - Primary database sheep
- Physical standby database cats
- Physical standby database
Fast-Start Failover: DISABLED
Configuration Status: SUCCESS
An attempt to enable fast-start failover raises an error:
DGMGRL> enable fast_start failover;
Error: ORA-16693: requirements not met for enabling fast-start failover Failed.
Identify three possible reasons for this error.
- A. The LogXptMode property is set to FASTSYNC on Cats while Sheep is the target standby database.
- B. The LogXptMode property is set to fastsync on Dogs.
- C. The LogxptModr property is set to async on Sheep while Sheep is the target standby database.
- D. The fastStartFailoverTarget property is not set on Dogs.
- E. The LogXptMode property is set to async on Dogs.
Answer: C,D,E
Explanation:
When enabling fast-start failover, certain conditions must be met:
The fastStartFailoverTarget property is not set on Dogs (A): The primary database (Dogs) needs to have a fast-start failover target configured for the operation to succeed.
The LogXptMode property is set to ASYNC on Sheep while Sheep is the target standby database (B): Fast-start failover requires synchronous redo transport (SYNC or FASTSYNC) to ensure zero data loss, which is a prerequisite for enabling the feature.
The LogXptMode property is set to ASYNC on Dogs (D): Similar to the previous point, the primary database must be configured to use synchronous redo transport for the fast-start failover to be possible.
Reference:
Oracle Data Guard Broker documentation
Oracle Database Error Messages Guide
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NEW QUESTION # 43
Which TWO are benefits of using Transaction Guard in a Data Guard environment?
- A. It protects against user errors being replicated to standby databases.
- B. It protects against logical corruptions being replicated to standby databases.
- C. It provides application continuity by rolling back uncommitted transactions interrupted by a failover or switchover.
- D. It provides application continuity by replaying transactions interrupted by a failover or a switchover
- E. It protects against recoverable errors during a planned or an unplanned outage of a primary database.
Answer: C,E
Explanation:
Transaction Guard provides benefits in terms of transaction consistency and recovery in a Data Guard environment:
It provides application continuity by rolling back uncommitted transactions interrupted by a failover or switchover (B): Transaction Guard ensures that any uncommitted transactions at the time of an outage are rolled back consistently, thus preserving the integrity of the application's data and state.
It protects against recoverable errors during a planned or an unplanned outage of a primary database (D): Transaction Guard offers protection against errors that can occur during outages, allowing applications to resume operations more quickly and reliably after recovery.
Reference:
Oracle Database High Availability Overview
Oracle Real Application Clusters Administration and Deployment Guide
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NEW QUESTION # 44
A Data Guard environment has this configuration and these attributes:
A primary database
A physical standby database named sbdb
The configuration is in maximum availability protection mode.
Then sbdb is converted to a snapshot standby database.
Which two statements are true?
- A. sbdb can still apply redo.
- B. The recovery time objective increases.
- C. sbdb can still receive redo.
- D. The protection mode is lowered to maximum performance.
- E. The recovery point objective increases.
Answer: C,E
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NEW QUESTION # 45
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