Overview

The RDS read-only instance is tailored to the read/write scenario that has a multitude of read requests rather than the write requests from the database. By creating multiple read-only instances for standard instance, it grants standard instance elastic read capacity expansion, which in turn raises the user's throughput capacity.

The RDS read-only instance is subordinate to the RDS standard instance, and they belong to a leader-follower relationship. The standard instance must be created before the creation of the read-only instance. Also, the subordinate read-only instance is automatically released if the standard instance is released.

Content below introduces the creation of an RDS for MySQL read-only instance, and you may create and manage the instance via the RDS console.

Notes:

• Presently, read-only instance supports the creation of master instances of MySQL 5.6 and MySQL 5.7
• Read-only instance only supports "Postpaid" rather than "Prepaid".
• Only one read-only instance can be purchased each time, and only five read-only instances may be purchased for one master instance.

Create Read-only Instance

1. Log in to Baidu AI Cloud Official Website, and enter the RDS console

   Select "Product Service > RDS", and enter the "RDS Console".

2. Select a master instance.

   After entering the RDS console, select one master instance of MySQL Dual-computer Version and click the "Instance Name" to enter the instance details page. On the "Instance Details" page, click "Create a Read-only Instance" at the top right corner to enter the "Create" page. Select the following information and confirm the instance configuration.

Region information

Availability zone

• See the master instance for allocation by default, for example, if the master instance is multi-AZ, it is assigned to a given single-AZ at random.
• The users may select an availability zone according to their needs.

Configuration Information

Notes:

• Read-only instance’s memory and disk capacity should be no less than the master instance's.

Purchase Information

Notes:

• Read-only instance only supports "Postpaid" rather than "Prepaid".
• Only one read-only instance can be purchased each time, and only five read-only instances may be purchased for one master instance.

3. Confirm the configuration.

After confirming the configuration information, click "Next" to go to the payment page. Here, you may view the selected instance's package and price for your confirmation.

4. Confirm the order.

After confirming, click the "Go to pay" button at the lower right corner. Then, the system shows the "Payment" page, on which you may confirm the payment and complete the order.

5. Make a payment successfully.

You may view the order by clicking "View Order Details", or click "Management Console" to enter "RDS-Instance List". The system creates RDS instance at the back end, which usually lasts for 5-10 minutes. After successful creation, you receive the information "Successfully create an RDS instance".

6. View the Instance.

After successful purchase, return to the "RDS-Instance List" page, where you may view the created RDS instance, instance status, location, database type, and expiry time.

7. View instance details.

In the instance list, click the instance name to enter the proxy instance details page. The "Basic Information" tag shows information such as instance running status and configuration. You may select other tags to manage and operate the instance.