1z0-915-1 Exam Dumps - MySQL HeatWave Implementation Associate Rel 1

Based on the provided SQL statements, the following two are true:

The data placement key of the airport table is airport_id(Answer A): The primary keyairport_idis used as the data placement key in theairporttable. This means that the data in the table is organized based on theairport_idvalues.

The data of the airport table is loaded into the MySQL DB system(Answer D): TheALTER TABLE airport SECONDARY_LOAD;statement successfully loads the data from the specified object storage file into the MySQL DB system.

References:

MySQL HeatWave Documentation

MySQL Engine Attributes

When changing the storage size of a DB system,you cannot decrease the DB system's storage size(Answer B). This restriction ensures data integrity and prevents potential data loss that could occur if the storage size were reduced.

You can only increase the storage size of the DB system.

The storage increase is done online without shutting down the DB system, allowing for uninterrupted operations.

References:

OCI MySQL DB System Scaling Documentation

Initialization variables(Answer A) cannot be modified in MySQL custom configurations. These variables are set at the start of the MySQL service and are not changeable without restarting the service.

Initialization variables are parameters that define how the MySQL server initializes.

Changes to these variables require restarting the MySQL server to take effect.

Examples include variables likeinnodb_buffer_pool_size, which determine memory allocation settings on startup.

References:

MySQL Configuration Variables Documentation

To migrate an on-premises MySQL database to a MySQL DB system on OCI with the least amount of application downtime,use inbound replication to synchronize the MySQL database transactions to the DB system(Answer C).

Inbound Replication: This method involves setting up replication from your on-premises MySQL database to the MySQL DB system in OCI. This ensures that all changes and transactions are continuously replicated, keeping the DB system up to date with minimal downtime.

Steps to Implement:

Set up the MySQL DB system in OCI.

Configure the on-premises MySQL database as the master and the OCI DB system as the slave.

Start the replication process to keep the DB system synchronized with the on-premises database.

When ready, switch the application to the DB system with minimal downtime as the data is already synchronized.

References:

MySQL Replication Documentation

OCI MySQL Database Service Replication

To copy transactions from an on-premises MySQL instance to a DB system, you useinbound replication(Answer B).

Inbound Replication: This feature allows the MySQL DB system to receive and apply changes (transactions) from an external MySQL instance.

Replication Configuration: You need to set up replication between the on-premises MySQL instance and the MySQL DB system by configuring the master (on-premises) and the slave (DB system) appropriately.

References:

MySQL Replication Documentation

OCI MySQL Database Service Documentation