Setting up Read Replica

The user can enter the necessary information for the Read Replica through the Samsung Cloud Platform Console and create the service through detailed options.

Configuring Replica

You can create a read-only replica server through Replica configuration. Up to 5 Replicas can be created per Database.

To configure a replica, follow these procedures.

1. All services > Database > MySQL(DBaaS) menu, click. It moves to the Service Home page of MySQL(DBaaS).
2. Service Home page, click the MySQL(DBaaS) menu. Move to the MySQL(DBaaS) list page.
3. MySQL(DBaaS) list page, click on the resource to configure the Replica. Move to the MySQL(DBaaS) details page.
4. Click the Replica Configuration button. It moves to the Replica Configuration page.
5. Enter information in the Replica Configuration area, then click the Complete button.

   Classification	Necessity	Detailed Description
   Number of Replicas	Required	Number of Replicas to configure Up to 5 can be configured per cluster If selecting 2 or more values, additional input of Replica name and service type information is required
   Replica name	required	Replica server name Starts with lowercase English letters, using lowercase letters, numbers, and special characters (-) to input 3 ~ 19 characters The entered Replica name is exposed as the cluster name in the list
   Service Type > Server Type	Required	Replica Server Type Standard: Standard specification commonly used High Capacity: High-capacity server with 24vCore or more
   Service Type > Planned Compute	Select	Current status of resources with Planned Compute set In Use: Number of resources with Planned Compute set that are in use Settings: Number of resources with Planned Compute set Coverage Preview: Amount applied by Planned Compute for each resource Create Planned Compute Service: Move to the Planned Compute service application page For more information, refer to Apply for Planned Compute
   IP Access Control	Select	Set service access policy Set access policy for IP entered on the page, so separate Security Group policy setting is not required Enter in IP format (e.g., 192.168.10.1) or CIDR format (e.g., 192.168.10.0/24, 192.168.10.1/32), and click the Add button To delete the entered IP, click the x button next to the entered IP
   Maintenance period	Select	DB maintenance period Use is selected, set the day of the week, start time, and duration It is recommended to set the maintenance period for stable management of the DB. Patch work is performed at the set time and service interruption occurs If set to not used, the company is not responsible for the problems that occur due to non-application of patches.
   tag	selection	add tag add tag button click after Key, Value value input or selection

   Table. MySQL(DBaaS) Replica Configuration Items

Replica reconstruction

In the event of a network failure or replication delay with the Master Cluster, the Replica reconstruction function can be used to re-replicate the Master Cluster’s data.

To reassemble the replica, follow the procedure below.

1. Click All Services > Database > MySQL(DBaaS) menu. It moves to the Service Home page of MySQL(DBaaS).
2. Service Home page, click the MySQL(DBaaS) menu. Move to the MySQL(DBaaS) list page.
3. Click on the resource to be reconstructed as a replica on the MySQL(DBaaS) list page. It moves to the MySQL(DBaaS) details page.
4. Replica Reconstruction 버튼을 클릭하세요. Replica Reconstruction Notification 팝업창이 열립니다.
5. Replica Reconstruction Alert popup window, click the Confirm button.

Promote Replica Cluster to Master Cluster

You can promote a fully configured Replica Cluster to a Master Cluster.

To promote the Replica Cluster to Master, follow these steps.

1. All Services > Database > MySQL(DBaaS) menu is clicked. It moves to the Service Home page of MySQL(DBaaS).
2. On the Service Home page, click the MySQL(DBaaS) menu. It moves to the MySQL(DBaaS) list page.
3. Click the resource to be promoted to Master on the MySQL(DBaaS) list page. It moves to the MySQL(DBaaS) details page.
4. Click the More button and click the Master Promotion button. The Master Promotion Notification popup window opens.
5. In the Master Promotion Alert popup window, click the OK button.