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TencentDB for Redis®
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    Inspect Node Information

    Last updated: 2024-11-05 10:10:15
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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. It also supports node management, which includes: adjusting node specifications, promoting replica nodes to primary nodes, enabling read-only for replicas, and switching due to primary/secondary failures. Ops personnel can manage instance nodes efficiently and locate related anomalies during node operation through node management.

      Version Description

      TencentDB for Redis® 4.0, 5.0, 6.2 versions standard architecture and cluster architecture instances, whether it's a single availability zone or multiple availability zones deployment, all support node management.
      TencentDB for Redis® 2.8 version does not 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. On the Instance List, find the target instance whose node you need to view.
      4. Click on its Instance ID to enter the Instance Details page, then click the Node Management tab.
      Standard Architecture
      
      Parameter Name
      Parameter Description
      Node ID
      The node ID number of the database instance.
      Roles
      The role of the current node, primary node or replica node.
      Availability Zone
      The availability zone to which the current node belongs.
      Monitoring
      click
      
      , view the monitoring views of various metrics of the node on the right monitoring panel. For specific information, see Monitoring at Five-Second Granularity.
      Status
      Running status of the current node.
      Slots
      Range of Slots on node.
      Memory usage
      Situation of memory capacity use on node.
      Cluster Structure
      Single Availability Zone
      
      Multiple Availability Zones
      
      Parameter Name
      Parameter Description
      Shard Name
      The shard name of a database sharded cluster. The shard name is concatenated from InstanceID_shard_Shard Number, and the shard number starts from 1 and is orchestrated in natural number order. For example: crs-mufy****_shard_1.
      Node ID
      The Node ID of the database instance, automatically generated by the system, serves as the unique identifier for the node.
      Node Group Name
      This parameter is displayed in cluster architectures spanning multiple availability zones.
      Multiple primary nodes from different shards logically form one primary node group, while replica nodes form a replica node group (replica set).
      Each node group name is concatenated from 'ng-number', where the number starts from 00 and is orchestrated in natural number order.
      Each node group name represents the primary-secondary role of the node.
      Roles
      This parameter represents the primary-secondary role of the node. It is displayed in cluster architecture within a single availability zone.
      Availability Zone
      The availability zone where the node is located. Multi-AZ instances will mark the primary availability zone or backup availability zone.
      Monitoring
      click
      
      , view the monitoring views of various metrics of the node on the right monitoring panel. For specific information, see Monitoring at Five-Second Granularity.
      Status
      Running status of the current node.
      Slots
      Range of Slots on node.
      Memory Usage
      Situation of memory usage on node.

      More Actions

      Configuration Adjustment

      On the Node Management page, you can adjust the specifications of the instance node, including: expanding/reducing node capacity, adding/removing replicas, adding/removing shards (cluster configuration) and other operations. For how to configure specific parameters, see Changing Instance Specifications.
      

      Promoting A Replica Node to Primary Node

      For a single availability zone deployment instance, TencentDB for Redis® supports manually promoting a replica node to primary node; for multi-availability zone instances, TencentDB for Redis® supports promoting a replica node to primary node; the cluster configuration supports promoting a replica node group to primary node group, and promotes the original replica node or replica node group's availability zone to primary availability zone. For specific operations, see Manually Promoting to Primary Node.
      

      Simulate Failure

      To facilitate failure simulation tests for your service, TencentDB for Redis® provides a feature for simulating failures in instances deployed across multiple availability zones. You can use the failure simulation feature on the Node Management page. For specific operations, see Failover.
      The entry for the failover simulation for Cluster Architecture instances:
      
      The entry for failover simulation in Standard Architecture instances:
      

      Read-Only Replica

      On the Node Management page, when the number of replica database instances is greater than or equal to 1, you can enable automatic read-write separation to improve the read performance vertically. For specific operations, see Enabling Read-Only Replica.
      

      Related APIs

      API Name
      API Description
      Query instance node information
      Query Redis node detailed information
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