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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:

  1. Click All Services > Database > MariaDB(DBaaS). This will take you to the MariaDB(DBaaS) Service Home page.
  2. Click MariaDB(DBaaS) on the Service Home page. This will take you to the MariaDB(DBaaS) list page.
  3. Click the resource you want to configure a replica for on the MariaDB(DBaaS) list page. This will take you to the MariaDB(DBaaS) details page.
  4. Click the Replica Configuration button. This will take you to the Replica Configuration page.
  5. Enter the information in the replica configuration area and click the Complete button.
Category
Required
Detailed Description
Number of ReplicasRequiredThe 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 NameRequiredThe name of the replica server
  • Start with a lowercase letter, and use lowercase letters, numbers, and special characters (-) to enter a 3-19 character string.
  • The entered replica name will be displayed as the cluster name in the list.
Service Type > Server TypeRequiredThe type of replica server
  • Standard: Standard specification commonly used
  • High Capacity: High-capacity server with 24vCore or higher (to be provided later)
Service Type > Planned ComputeOptionalThe 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 based on Planned Compute
  • Apply for Planned Compute Service: Move to the Planned Compute service application page
Service Type > Block StorageRequiredBlock 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 cluster
    • Only DATA and TEMP purposes can be added in the replica.
    • Select Use and enter the storage purpose and capacity
    • To add storage, click the + button, and to delete, click the x button
    • Capacity can be entered in multiples of 8 within the range of 16 to 5,120, and up to 9 can be created, including the number set in the original cluster
IP Access ControlOptionalService 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 PeriodOptionalDB maintenance period
  • Use is selected, and the day, start time, and period are set
  • It is recommended to set a maintenance period for stable DB management. Patch work is performed during the set time, and service interruption occurs
  • If not used, the company is not responsible for problems that occur due to non-application of patches.
Table. MariaDB(DBaaS) Replica Configuration Items

Reconfiguring Replica

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

To reconfigure a replica, follow these steps:

  1. Click All Services > Database > MariaDB(DBaaS). This will take you to the MariaDB(DBaaS) Service Home page.
  2. Click MariaDB(DBaaS) on the Service Home page. This will take you to the MariaDB(DBaaS) list page.
  3. Click the resource you want to reconfigure a replica for on the MariaDB(DBaaS) list page. This will take you to the MariaDB(DBaaS) details page.
  4. Click the Reconfigure Replica button. The Reconfigure Replica notification popup will open.
  5. Click the Confirm button in the Reconfigure Replica notification popup.

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 is terminated.

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

  1. Click All Services > Database > MariaDB(DBaaS). This will take you to the MariaDB(DBaaS) Service Home page.
  2. Click MariaDB(DBaaS) on the Service Home page. This will take you to the MariaDB(DBaaS) list page.
  3. Click the resource you want to promote to a master on the MariaDB(DBaaS) list page. This will take you to the MariaDB(DBaaS) details page.
  4. Click the More button and then click the Promote to Master button. The Promote to Master notification popup will open.
  5. Click the Confirm button in the Promote to Master notification popup.
DB Backup and Recovery
Release Note