Configure Read Replica

Users can enter the required information for a Read Replica through the Samsung Cloud Platform Console and create the service using detailed options.

Configure Replica

You can create replica servers for read‑only or disaster‑recovery purposes through replica configuration. You can create up to 5 replicas per database.

To configure a Replica, follow these steps.

1. All Services > Database > MySQL(DBaaS) Click the menu. 1. Navigate to the Service Home page of MySQL (DBaaS).
2. On the Service Home page, click the MySQL(DBaaS) menu. 2. MySQL(DBaaS) List Navigate to the page.
3. On the MySQL(DBaaS) List page, click the resource to configure a Replica. 3. MySQL(DBaaS) Details Navigate to the page.
4. Click the Replica configuration button. 4. Go to the Replica configuration page.
5. After entering information in the Replica configuration area, click the Done button.

   Category	required status	Detailed description
   Region	required	Region to configure the Replica Replica configuration (Other Region) is displayed only when selected
   Replica count	Required	Number of Replicas to configure Up to 5 can be configured per cluster If you select more than one value, additionally enter the Replica name and service type information
   Replica name	Required	Replica server name Start with a lowercase English letter, and use lowercase letters, numbers, and special characters (-) to enter 3 to 19 characters The entered Replica name is displayed as the cluster name in the list
   Service Type > Server Type	Required	Replica server type Standard: standard specification commonly used High Capacity: large-capacity server with 24 vCores or more
   Service Type > Planned Compute	Selection	Status of resources with Planned Compute configured In Use: Number of resources with Planned Compute configured that are currently in use Configured: Number of resources with Planned Compute configured Coverage Preview: Amount applied per resource by Planned Compute Create Planned Compute Service: Navigate to the Planned Compute service application page For more details, see Apply for Planned Compute
   IP access control	Select	Service Access Policy Configuration Since the access policy is set for the IP entered on the page, a separate Security Group policy configuration is not required Enter in IP format (example: 192.168.10.1) or CIDR format (example: 192.168.10.0/24, 192.168.10.1/32) and click the Add button To delete an entered IP, click the x button next to the entered IP
   maintenance period	Select	Database maintenance window If you select Use, set the day of week, start time, and duration It is recommended to set a maintenance window for stable management of the DB. Patch operations will be performed at the scheduled time, causing service interruptions If set to unused, we are not responsible for issues arising from patches not being applied.
   Tag	Select	Add Tag Add Tag after clicking the button, enter or select Key, Value values

   Table. MySQL (DBaaS) Replica configuration items

Reconfigure Replica

If a network outage or replication delay with the Master Cluster occurs, you can use the Replica reconstruction function to replicate the Master Cluster’s data again.

To reconfigure the Replica, follow the steps below.

1. All Services > Database > MySQL(DBaaS) Click the menu. 1. Navigate to the Service Home page of MySQL (DBaaS).
2. On the Service Home page, click the MySQL(DBaaS) menu. 2. MySQL(DBaaS) List Navigate to the page.
3. On the MySQL(DBaaS) List page, click the resource to reconfigure the Replica. 3. MySQL(DBaaS) Details Navigate to the page.
4. Click the Replica reconstruction button. 4. Replica Reconfiguration Notification A popup window opens.
5. Replica Reconfiguration Notification In the popup window, click the Confirm button.

Promoting a Replica Cluster to a Master Cluster

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

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

1. Click the All Services > Database > MySQL (DBaaS) menu. 1. Go to the Service Home page of MySQL (DBaaS).
2. On the Service Home page, click the MySQL(DBaaS) menu. 2. MySQL(DBaaS) List Go to the page.
3. MySQL(DBaaS) List On the page, click the resource to promote to Master. 3. MySQL(DBaaS) Details Go to the page.
4. Click the More button and then click the Promote to Master button. 4. Master Promotion Notification The popup window opens.
5. In the Master Promotion Notification popup, click the Confirm button.