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Overview

TencentDB for Redis allows you to view the instance node information, including node ID, role, running status, and used capacity. In addition, it supports node management operations, such as adjusting node specification, promoting replica node to master node, enabling read-only replica, and configuring master/replica failover. You can use node management to efficiently manage instance nodes and locate node exceptions.

Version Requirements

• All TencentDB for Redis 4.0 and 5.0 standard architecture multi-AZ instances support node management, while single-AZ instances don't.
• All TencentDB for Redis 4.0 and 5.0 cluster architecture single-AZ and multi-AZ instances support node management.
• TencentDB for Redis 2.8 instances don't support node management.

Viewing Node Information

1. Log in to the TencentDB for Redis console.
2. Above the Instance List on the right, select the region.
3. In the instance list, find the target instance.
4. Click the instance ID to enter the Instance Details page and click the Node Management tab.

• Standard architecture multi-AZ instance
  

  Parameter	Description
  Node ID	Node ID of the database instance.
  Monitoring	Click , and you can view the monitoring views of various metrics of the node on the monitoring panel on the right. For more information, see Monitoring at Five-Second Granularity.
  Status	Running status of the current node.
  AZ	AZ of the current node.
  Role	Role of the current node, which is Master Node or Replica Node.
  Used Memory	Node memory usage.

• Cluster architecture single-AZ instance

  Parameter	Description
  Node Name	Node name of the database instance.The node name is concatenated by Instance ID_Shard ID_Replica ID
  Node ID	Node ID of the database instance.
  Role	Node role, which is Master Node or Replica Node.
  Key Quantity	Number of keys stored on the node.
  Slots	Value range of the number of slots on the node.
  Used Capacity	Node capacity usage.

• Cluster architecture multi-AZ instance

  Parameter	Description
  Node ID	Node ID of the database instance.
  Role	Node role, which is Master Node or Replica Node.
  Monitoring	Click , and you can view the monitoring views of various metrics of the node on the monitoring panel on the right. For more information, see Monitoring at Five-Second Granularity.
  Status	Running status of the current node.
  Slots	Value range of the number of slots on the node.
  Used Memory	Node memory usage.

More Operations

Changing configuration

On the Node Management page, you can adjust the instance node specification by performing operations such as expanding/reducing node capacity, adding/deleting replicas, and adding/deleting shards (for cluster architecture). For more information on how to configure parameters, see Changing Instance Specification.

Multi-AZ standard architecture

Multi-AZ cluster architecture

Promoting replica node to master node in multi-AZ deployment

For a multi-AZ standard or cluster architecture instance, you can promote a replica node to the master node on the Node Management page. For detailed directions, see Manually Promoting to Master Node (Group).

Simulating failure

To help you perform simulated failure testing, TencentDB for Redis offers the failure simulation feature. You can use this feature on the Node Management page. For detailed directions, see Failover.

Failure simulation entry of cluster architecture instance:

Failure simulation entry of standard architecture instance:

Read-only replica

On the Node Management page, if the instance has at least one replica, you can enable automatic read/write separation to expand the read performance vertically. For detailed directions, see Enabling/Disabling Read/Write Separation.

Related APIs