Add an OBServer node|V4.3.5| docs|Distributed Database

Add an OBServer node

Last Updated：2025-03-28 08:05:55 Updated

You can add OBServer nodes to a cluster that you manage to scale out the cluster.

Prerequisites

Make sure that you have the following permissions:
- Resource Permissions : Cluster Maintenance permission
- Menu Permissions : Permission on the Overview menu of Clusters
The target OceanBase cluster is managed in the current OceanBase Cloud Platform (OCP) cluster.

Otherwise, you need to take over the OceanBase cluster to the current OCP cluster. For more information, see Take over a cluster.
You cannot add an OBServer node to a standalone centralized database.

You can perform the following steps to add OBServer nodes to multiple zones at a time.

Log on to the OCP console.
In the left-side navigation pane, click Clusters . The Clusters page automatically appears.
On the Clusters page, find the target cluster and click its name.
Go to the Overview page of the cluster and click Add OBServer in the upper-right corner.

In the dialog box that appears, specify the following parameters.

Parameter	Description
Software Package Type	The software installation package type of the OBServer node, which is the same as that of the current OceanBase cluster. If the system cannot identify the software installation package type of the OceanBase cluster, you need to select an appropriate installation package based on the version of your operating system.
OBServer Information	The model and IP address of the host of one or more OBServer nodes to be added. If you do not need to add an OBServer node to a zone, click the Delete icon of the corresponding zone to remove the zone.
Custom Settings	The OS user, path, and port number of the OBServer node. For more information, see the section about custom settings in Create a distributed cluster.
Parameter Settings	The startup parameters of the OBServer node. For more information, see Overview.

You can select only a host that matches the hardware architecture of the current cluster.
In a production environment, we recommend that the size of the log disk for an OBServer node be at least three times the memory size of the host. To avoid performance issues, we recommend that you do not create the data directory and the log directory on the same disk.

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Click OK .

In the dialog box that appears, you can click View Task to view the progress. You can also view the task progress in Task Center .

When the task enters the Completed state, and the status of the OBServer node is displayed as Running in the OBServer node list on the Overview page of the cluster, the OBServer node is added.

You can perform the following steps to add one or more OBServer nodes to one zone.

Log on to the OCP console.
In the left-side navigation pane, click Clusters . The Clusters page automatically appears.
On the Clusters page, find the target cluster and click its name.
On the Overview page, find the row of the target zone in the Zones list, and click Add OBServer in the Actions column.

In the dialog box that appears, specify the following parameters.

Parameter	Description
Software Package Type	The software installation package type of the OBServer node, which is the same as that of the current OceanBase cluster. If the system cannot identify the software installation package type of the OceanBase cluster, you need to select an appropriate installation package based on the version of your operating system.
OBServer Information	The model and IP address of the host of one or more OBServer nodes to be added. By default, only one OBServer node will be added. To add more OBServer nodes, click Add OBServer .
Custom Settings	The OS user, path, and port number of the OBServer node. For more information, see the section about custom settings in Create a distributed cluster.
Parameter Settings	The startup parameters of the OBServer node. For more information, see Overview.

You can select only a host that matches the hardware architecture of the current cluster.
In a production environment, we recommend that the size of the log disk for an OBServer node be at least three times the memory size of the host. To avoid performance issues, we recommend that you do not create the data directory and the log directory on the same disk.

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