This topic describes how to add a tenant replica.
Note
Adding a replica triggers partition replica migration, and increases the storage I/O of OBServer nodes and the network traffic between OBServer nodes. To control traffic surges, we recommend that you change the values of the ha_high_thread_score and ha_mid_thread_score parameters, or perform resource isolation for HA_HIGH and HA_MID background tasks.
Prerequisites
Make sure that you have the following permissions:
-
Resource Permissions : Cluster Maintenance or Tenant Maintenance permission -
Menu Permissions : Permission on theOverview menu ofTenants
-
In a standalone centralized database, you cannot add replicas for a tenant.
Procedure
Log in to the OceanBase Cloud Platform (OCP) console.
In the left-side navigation pane, select
Tenants . TheTenants page automatically appears.On the
Tenants page, find the target tenant and click its name to go to theOverview page of the tenant.Click
Create Replica in the upper-right corner of the page.
In the dialog box that appears, configure the
Target Zone ,Replica Type ,Unit Specifications , andUnits parameters. You can add replicas for multiple zones.
Parameter Description Target Zone The zone where the new replica exists. You can select a zone of the current cluster. Replica Type The type of the replica. Select multiple full-featured replicas to ensure that they are in the majority. For more information, see the description of the Replica Type parameter in Create a primary tenant.Unit Specifications The unit specifications for the new replica. For more information, see the description of the Unit Specification parameter in Create a primary tenant.Units The number of units for the new replica. For more information, see the description of the Units parameter in [Create a primary tenant.Click
OK .