E-MapReduce (EMR) Serverless StarRocks allows you to restart an instance for instance maintenance. For example, you can restart your instance for system updates, configuration changes, or other situations where a service restart is required to ensure that the new settings take effect.
The restart operation stops a instance for a short period of time and may interrupt services that run on the instance. We recommend that you restart an instance during off-peak hours. Before you restart an instance, make sure that the client has a service retry mechanism to prevent services from being affected.
Prerequisites
The instance that you want to restart is in the Running state.
Procedure
Go to the Instances tab.
Log on to the EMR console.
In the left-side navigation pane, choose .
In the top navigation bar, select a region based on your business requirements.
On the Instances tab, find the desired instance and click Restart in the Actions column.
In the Confirmation dialog box, configure the Restart Mode parameter and click OK. The following table describes available restart modes.
Restart mode
Description
Rolling restart
All nodes in a StarRocks instance are restarted in sequence. This ensures that specific nodes are running to maintain service availability. This mode applies to scenarios in which high service continuity is required and can effectively reduce the impact on your business.
Quick restart
The restart speed is fast. This mode applies to scenarios in which a restart operation needs to be completed as soon as possible.
Single-node restart
This mode applies to scenarios in which only a specific node needs to be restarted. To use this method, specify the node type and the target node.
If your instance is a shared-data instance, and the selected node type is CN, you can specify the warehouse to enable granular control over the restart scope.