Oracle 1z0-915-1 - MySQL HeatWave Implementation Associate Rel 1

Given the SSH command sets up port forwarding from the local port3311to the remote MySQL DB system port3306, the correct command to connect to the MySQL DB system from the client machine is:

C.mysqlsh mysql://admin@127.0.0.1:3311

This command connects to the local machine's port3311, which forwards the connection to the MySQL DB system at10.10.1.187:3306.

Three operations that can be performed on a MySQL HeatWave backup are:

B.Change the retention period of an active manual backup: You can adjust how long the backup is retained. C.Restore an active backup to a new DB system in another region: You can restore backups to different regions for disaster recovery or data migration. E.Move an active backup to another compartment: You can organize and manage backups by moving them to different compartments.

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

Automatic DB system version upgrades in OCI are performed to the next release in sequence. This means that the system is upgraded to the next available version rather than skipping to the most recent release, ensuring a stable and tested upgrade path.

The MySQL usermysql.sysis a reserved username used by the system for internal purposes. It cannot be used as a customer-defined user account to prevent conflicts with the system operations and maintain the integrity of the database's internal workings.

A.Reduce query latency: By distributing read queries across multiple replicas, the load on the primary instance is reduced, which can decrease query latency. D.Scale read queries: Read replicas allow scaling of read operations by providing additional instances to handle read queries, improving overall performance and throughput.

To use the point-in-time recovery feature in a DB system,automatic backupsmust be enabled (Answer B).

Point-in-Time Recovery: This feature allows you to restore your database to a specific point in time, which is crucial for recovering from accidental data loss or corruption.

Automatic Backups: These provide the necessary backup data that can be used to restore the database to the desired point in time.

References:

OCI MySQL Database Service Point-in-Time Recovery

Automatic Backups Documentation

To create a connection in Database Tools to use the SQL Worksheet feature, the following steps are required:

Create an OCI password(Answer A): This password is necessary for authentication when connecting to the MySQL DB system.

Create an OCI secret(Answer D): Secrets are used to store sensitive information like passwords securely. The secret will contain the database credentials.

Import an X.509 certificate into the OCI vault(Answer E): This certificate is required for secure connections to the database, ensuring encrypted communication.

References:

OCI Database Tools Documentation

Using OCI Secrets

X.509 Certificates Documentation

Before enabling a MySQL HeatWave cluster,you must create a DB system with a HeatWave shape(Answer D). The HeatWave shape includes the necessary resources and configuration to support the HeatWave in-memory query accelerator.

Steps:

Create a MySQL DB system in OCI Console.

Choose a HeatWave shape during the DB system creation process.

Once the DB system is created, you can enable and configure the HeatWave cluster.

References:

MySQL HeatWave Documentation