Introduction
- What Is DDS?
- Advantages
- Typical Application Scenarios
- Functions and Features
- System Architecture
  - Cluster
  - Replica Set
- Instances
- Basic Concepts
- Permissions Management
- Related Services
Overview
Getting Started with Clusters
- Creating a Cluster Instance
  - Quick Config
  - Custom Config
- Connecting to a Cluster Instance
Getting Started with Replica Sets
- Creating a Replica Set Instance
  - Quick Config
  - Custom Config
- Connecting to a Replica Set Instance
Logging In to the DDS Console
Data Migration
Instance Lifecycle Management
- Instance Statuses
- Exporting Instance Information
- Restarting an Instance or a Node
- Deleting a Instance
- Recycling an Instance
  - Modifying the Recycling Policy
  - Rebuilding an Instance
Instance Modifications
- Changing an Instance Name
- Modifying an Instance Tag
- Upgrading a Minor Engine Version
- Scaling Up Storage Space
  - Scaling Up a Cluster Instance
  - Scaling Up a Replica Set Instance
- Changing an Instance Class
  - Changing a Cluster Instance Class
  - Changing a Replica Set Instance Class
- Changing Cluster Instance Nodes
- Changing Replica Set Instance Nodes
- Configuring the Maintenance Window
- Changing an AZ
Data Backups
- Backup Principles and Solutions
- Configuring an Automated Backup Policy
- Configuring the Cross-Region Backup Policy
- Creating a Manual Backup
- Deleting a Manual Backup
- Deleting an Automated Backup
- Downloading a Backup File
  - Using OBS Browser+
Data Restorations
- Restoring Data to a New Instance
  - Restoring a Cluster Backup to a New Instance
  - Restoring a Replica Set Backup to a New Instance
- Restoring Data to the Original Instance
  - Restoring a Cluster Backup to the Original Instance
  - Restoring a Replica Set Backup to the Original Instance
Parameter Template Management
- Creating a Parameter Template
- Modifying a Parameter Template
- Viewing Parameter Change History
- Exporting a Parameter Template
- Comparing Parameter Templates
- Replicating a Parameter Template
- Resetting a Parameter Template
- Applying a Parameter Template
- Viewing Application Records of a Parameter Template
- Modifying the Description of a Parameter Template
- Deleting a Parameter Template
Connection Management
- Configuring Cross-CIDR Access
- Enabling IP Addresses of Shard and Config Nodes
- Changing a Private IP Address
- Changing a Database Port
Database Usage
- Creating a Database Account Using Commands
- Which Commands are Supported or Restricted by DDS?
Data Security
- Enabling or Disabling SSL
- Resetting the Administrator Password
- Changing a Security Group
Monitoring and Alarm Reporting
- DDS Metrics
- Viewing DDS Metrics
- Configuring Alarm Rules
Auditing
- Key Operations Recorded by CTS
- Viewing Events
Logs
- Log Reporting
- Error Logs
- Slow Query Logs
- Audit Logs
Task Center
DBA Assistant
- Real-Time Diagnosis
  - Real-Time Sessions
SQL Execution Control
DDS Usage Suggestions
- Design Rules
- Development Rules
FAQs
- Product Consulting
- Resource and Disk Management
- Capacity Expansion and Specification Changes
  - Can Nodes Be Added to DDS Instances?
  - Is DDS Available When Nodes Are Being Added?
- Database Performance
  - What Is the Time Delay for Primary/Secondary Synchronization in a Replica Set?
  - What Can I Do If a Query Error Is Reported After Data Is Written Into the DDS Cluster?
- Database Permissions
  - What Permissions Does User root Have?
- Creation and Deletion
  - Can I Use a Template to Create DDS DB Instances?
  - Will My Backups Be Deleted If I Delete My Cloud Account?
- Database Connection
- Installing a Client
  - How Can I Install a MongoDB Client?
  - How Do I Install Robo 3T?
- Database Usage
  - Does DDS Delete Expired Data Using TTL Indexes?
  - How Do I Manage Balancers?
- Database Storage
  - What Should I Do If My Data Exceeds the Database Storage Space of a DDS Instance?
- Database Parameters
- Backup and Restoration
  - How Do I Back Up DDS Databases to an ECS?
  - How Long Does DDS Store Backup Data For?
- Network Security
- Monitoring and Alarm
  - What DB Instance Monitoring Metrics Do I Need to Pay Attention To?
Change History

Is DDS Available When Nodes Are Being Added?