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Configuring Read Replica

Users can create a Read Replica by entering the required information through the Samsung Cloud Platform Console and configuring detailed options.

Configuring Replica

Replica configuration allows you to create a read-only replica server. You can create up to 5 replicas per database.

To configure a replica, follow these steps:

All Services > Database > EPAS(DBaaS) menu, click. Move to the Service Home page of EPAS(DBaaS).
On the Service Home page, click the EPAS(DBaaS) menu. Move to the EPAS(DBaaS) List page.
On the EPAS(DBaaS) List page, click the resource you want to configure the replica for. Move to the EPAS(DBaaS) Details page.
Click the Configure Replica button. Move to the Configure Replica page.
Enter the information in the Configure Replica section and click the Complete button.

Category	Required	Detailed Description
Number of Replicas	Required	The number of replicas to configure Up to 5 replicas can be configured per cluster. If you select 2 or more values, you need to enter additional information such as replica name and service type.
Replica Name	Required	The name of the replica server Start with a lowercase letter, and use lowercase letters, numbers, and special characters (`-`) to enter 3-19 characters. The entered replica name will be exposed as the cluster name in the list.
Service Type > Server Type	Required	The type of replica server Standard: Standard specification commonly used High Capacity: High-capacity server with 24vCore or more
Service Type > Planned Compute	Optional	The current status of resources with Planned Compute set In Use: The number of resources with Planned Compute set that are in use Set: The number of resources with Planned Compute set Coverage Preview: The amount applied to each resource with Planned Compute Apply for Planned Compute Service: Move to the Planned Compute service application page For more information, see Applying for Planned Compute
Service Type > Block Storage	Required	Block storage settings for the replica DB Basic OS: The area where the DB engine is installed DATA: The storage area for table data and archive files, etc. Applied equally to the storage type set in the original cluster Capacity settings are not available Additional: Storage area for DATA, Archive, TEMP, and Backup data Applied equally to the storage type set in the original DB Only DATA and TEMP purposes can be added in the replica. Select Use and enter the purpose and capacity of the storage. The capacity can be entered in the range of 16 to 5,120 in multiples of 8. To add storage, click the + button, and to delete, click the x button. Up to 9 can be added.
IP Access Control	Optional	Service access policy setting Access policy is set for the IP entered on the page, so you do not need to set a separate Security Group policy. Enter the 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	Optional	DB maintenance period Use: Select the day of the week, start time, and period It is recommended to set the maintenance period for stable DB management. Patch work will be done during the set time, and the service will be suspended. If not used, the company is not responsible for any problems that occur due to non-application of patches.

Table. EPAS(DBaaS) Replica Configuration Items

Reconfiguring Replica

If a network failure or replication delay occurs between the master cluster, you can reconfigure the replica to re-replicate the master cluster’s data.

To reconfigure a replica, follow these steps:

All Services > Database > EPAS(DBaaS) menu, click. Move to the Service Home page of EPAS(DBaaS).
On the Service Home page, click the EPAS(DBaaS) menu. Move to the EPAS(DBaaS) List page.
On the EPAS(DBaaS) List page, click the resource you want to reconfigure the replica for. Move to the EPAS(DBaaS) Details page.
Click the Reconfigure Replica button. The Reconfigure Replica Notification popup window opens.
In the Reconfigure Replica Notification popup window, click the Confirm button.

Promoting Replica Cluster to Master

You can promote a configured replica cluster to a master cluster.

Note

When promoting to a master, synchronization with the existing master cluster will be terminated.

To promote a replica cluster to a master, follow these steps:

All Services > Database > EPAS(DBaaS) menu, click. Move to the Service Home page of EPAS(DBaaS).
On the Service Home page, click the EPAS(DBaaS) menu. Move to the EPAS(DBaaS) List page.
On the EPAS(DBaaS) List page, click the resource you want to promote to a master. Move to the EPAS(DBaaS) Details page.
Click the More button and then click the Promote to Master button. The Promote to Master Notification popup window opens.
In the Promote to Master Notification popup window, click the Confirm button.

DB Backup and Recovery

Extension use