Oracle Exam 1Z0-1093-25 Topic 3 Question 2 Discussion

Actual exam question for Oracle's 1Z0-1093-25 exam

Question #: 2
Topic #: 3

Which of the following is the recommended approach for migrating a large, mission-critical database from an on-premises Exadata system to Exadata Database Service with minimal downtime?

ATraditional export/import using Data Pump over a public network.

BCreating a physical standby database using Data Guard and switching over to the standby in OCI.

CPerforming a full backup and restore to a new Exadata Database Service instance.

DUsing SQL Developer to copy the data over a VPN connection.

Show Suggested Answer

Suggested Answer: B

B . Using Data Guard for physical standby and switchover:

This method enables minimal downtime migration.

Steps:

Configure Data Guard to synchronize the standby database with the primary on-premises database.

Once synchronized, perform a switchover to make the standby the new primary.

Downtime is limited to the switchover duration.

This approach leverages real-time replication to minimize disruption.

Why the other options are incorrect:

A . Export/Import with Data Pump: Too time-consuming for large databases.

C . Full backup and restore: High downtime due to the time required for data transfer and restoration.

D . Copying via SQL Developer: Not feasible for mission-critical and large databases due to slow transfer speeds.

Oracle Data Guard Documentation: Minimal Downtime Migration

by Elvera at Apr 07, 2025, 01:26 PM

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Gladys

9 hours ago

I agree with Rodney. It makes sense to minimize downtime by using Data Guard for migration.

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Kina

4 days ago

I'd go with option C. A full backup and restore might be the safest bet, even if it takes a bit longer.

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Rodney

12 days ago

I think the recommended approach is B) Creating a physical standby database using Data Guard and switching over to the standby in OCI.

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Twana

18 days ago

Option B seems like the way to go. Data Guard is the recommended approach for mission-critical databases.

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Marva

9 hours ago

That sounds like a solid plan. Data Guard is known for its reliability.

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Kasandra

4 days ago

B) Creating a physical standby database using Data Guard and switching over to the standby in OCI.

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