Configure Read Replica

Users can create the service by entering required information for Read Replica through Samsung Cloud Platform Console and selecting detailed options.

Configure Replica

Through Replica configuration, you can create replica servers for read-only or disaster recovery purposes. You can create up to 5 Replicas per Database.

Follow these steps to configure Replica.

1. Click All Services > Database > MySQL(DBaaS) menu. You will move to the Service Home page of MySQL(DBaaS).
2. On the Service Home page, click the MySQL(DBaaS) menu. You will move to the MySQL(DBaaS) List page.
3. On the MySQL(DBaaS) List page, click the resource to configure Replica. You will move to the MySQL(DBaaS) Details page.
4. Click the Replica Configuration button. You will move to the Replica Configuration page.
5. After entering information in the Replica Configuration area, click the Complete button.

   Classification	Required	Detailed Description
   Region	Required	Region to configure Replica Displayed only when Replica Configuration (Other Region) is selected
   Replica Count	Required	Number of Replicas to configure Can configure up to 5 per cluster If you select a value of 2 or more, you need to additionally enter Replica name and service type information
   Replica Name	Required	Replica server name Start with lowercase English letters and enter 3 to 19 characters using lowercase letters, numbers, and special characters (-) Entered Replica name is displayed as cluster name in the list
   Service Type > Server Type	Required	Replica server type Standard: Standard specifications generally used High Capacity: Large capacity server with 24vCore or more
   Service Type > Planned Compute	Optional	Resource status where Planned Compute is set In Use: Number of resources in use among resources where Planned Compute is set Set: Number of resources where Planned Compute is set Coverage Preview: Amount applied as Planned Compute per resource Create Planned Compute Service: Move to Planned Compute service application page For details, refer to Apply for Planned Compute
   IP Access Control	Optional	Service access policy setting Since access policy is set for IPs entered on the page, 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 entered IP, click the x button next to the entered IP
   Maintenance Window	Optional	DB maintenance window If you select Use, set day of week, start time, and duration It is recommended to set a maintenance window for stable DB management. Patch work is performed at the set time and service interruption occurs If set to Not Used, Samsung SDS is not responsible for problems caused by not applying patches.
   Tags	Optional	Add tags Click the Add Tag button and then enter or select Key, Value values

   Table. MySQL(DBaaS) Replica Configuration Items

Reconfigure Replica

In case of network failure or Replication delay with Master Cluster occurs, you can replicate Master Cluster’s data again through Replica reconfiguration functionality.

Follow these steps to reconfigure Replica.

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

Promote Replica Cluster to Master Cluster

You can promote the configured Replica Cluster to Master Cluster.

Follow these steps to promote Replica Cluster to Master.

1. Click All Services > Database > MySQL(DBaaS) menu. You will move to the Service Home page of MySQL(DBaaS).
2. On the Service Home page, click the MySQL(DBaaS) menu. You will move to the MySQL(DBaaS) List page.
3. On the MySQL(DBaaS) List page, click the resource to promote to Master. You will move 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. On the Master Promotion Notification popup window, click the Confirm button.