View the details of a disaster recovery instance group - ApsaraDB RDS

The instance group details page gives you a consolidated view of your disaster recovery setup. It shows basic group metadata, a topology graph of replication links between the primary and disaster recovery instances, a configuration list of all RDS and Data Transmission Service (DTS) instances, and replication performance metrics.

Prerequisites

Before you begin, ensure that you have:

A disaster recovery instance created

Open the instance group details page

Go to the Global Distributed Cache page.
In the instance group list, click the ID of the instance group you want to view.

The details page opens with sections for basic information, topology, configuration list, and replication performance.

View basic information

The Basic information section shows the following fields for the instance group:

Field	Description
Instance Group ID	Unique identifier for the instance group
Name	Display name of the instance group
Type	Group type
Database Type	Database engine type
Creation Time	Time the instance group was created
Running Status	Current operational status of the instance group
Region	Region where the instance group is deployed

View the topology

The topology graph visualizes the replication links between the primary instance and disaster recovery instances. For each link, the graph displays the link status, instance status, and basic instance information.

Click an instance ID in the topology to open the RDS instance details page for that instance.

View the configuration list

The configuration list has two tabs: RDS Instance List and DTS Instance List.

RDS instance list

The RDS Instance List shows all instances in the group and their properties:

Column	Description
Running Status	Current operational status of the instance
Region/Zone	Region and zone where the instance is deployed
Role	Role of the instance (primary or disaster recovery)
Creation Time	Time the instance was created

You can view and manage the instances of each role in this list.

DTS instance list

The DTS Instance List shows the data synchronization links from the primary instance to each disaster recovery instance, along with each link's Region, Running Status, and Creation Time.

When you promote a disaster recovery instance to primary, the DTS synchronization link attached to that instance is automatically released. No manual action is required.

View replication performance

Specify a time range to view the following metrics:

Metric	Description
`dag_lag_seconds`	Replication latency (seconds)
`dag_unhealthy_db_count`	Number of unhealthy databases in replication
`dag_log_send_queue_size_kb`	Size of the log sending queue (KB)
`dag_log_send_rate_kb_per_sec`	Rate at which logs are sent to the disaster recovery instance (KB/s)
`dag_log_redo_queue_size_kb`	Size of the log application queue (KB)
`dag_log_redo_rate_kb_per_sec`	Rate at which logs are applied on the disaster recovery instance (KB/s)