Edge Acceleration
  • Site Acceleration
    • Overview
    • Quickly Import and Export Site Configuration
    • Access Control
      • Token Authentication
    • Smart Acceleration
    • File Optimization
      • Smart Compression
    • Network Optimization
      • HTTP/2
      • HTTP/3(QUIC)
        • Overview
        • Enable HTTP/3
        • QUIC SDK
          • SDK Overview
          • SDK Download and Integration
          • Sample Code
            • Android
            • iOS
          • API Documentation
            • Android
            • iOS
      • IPv6 Access
      • Maximum Upload Size
      • WebSocket
      • Client IP Geolocation Header
      • Client IP Geographical Location
      • gRPC
    • URL Rewrite
      • Access URL Redirection
      • Origin-Pull URL Rewrite
    • Modifying Header
      • Modifying HTTP Response Headers
      • Modifying HTTP Request Headers
    • Custom Error Page
    • Request and Response Actions
      • Processing order
      • Default HTTP Headers of Origin-Pull Requests
      • Default HTTP Response Headers
    • Media Services
      • Audio and Video Pre-pulling
      • Just-in-Time Image Processing
      • Just-in-Time Media Processing
      • VOD Media Origin
  • L4 Proxy
    • Overview
    • Creating an L4 Proxy Instance
    • Modifying an L4 Proxy Instance
    • Disabling or Deleting an L4 Proxy Instance
    • Batch Configuring Forwarding Rules
    • Obtaining Real Client IPs
      • Obtaining Real TCP Client IPs via TOA
      • Obtaining Real Client IPs Through Protocol V1/V2
        • Overview
        • Method 1: Obtaining Real Client IPs Through Nginx
        • Method 2: Parsing Real Client IPs on Application Server
        • Format of Real Client IPs Obtained Through Proxy Protocol V1/V2
      • Transmitting Client Real IP via SPP Protocol
  • Edge DNS
    • Hosting DNS Records
      • Modifying DNS Servers
      • Configuring DNS Records
      • Advanced DNS Configuration
    • Domain Connection
      • Adding A Domain Name for Acceleration
      • Ownership Verification
      • Modifying CNAME Records
    • Domain alias
      • Overview
      • Configuration Guide
      • Batch Connecting SaaS Domain Names
      • Configuring Alias Domain Names for Disaster Recovery
    • Traffic Scheduling
      • Traffic Scheduling Management
    • Origin Configuration
      • Origin-pull configuration
        • Configuring Origin-Pull HTTPS
        • Host Header Rewrite
        • Controlling Origin-pull Requests
        • Redirect Following During Origin-Pull
        • HTTP/2 Origin-Pull
        • Range GETs
      • Load Balancing
        • Overview
        • Quickly Create Load Balancers
        • Health Check Policies
        • Viewing the Health Status of Origin Server
        • Related References
          • Load Balancing-Related Concepts
          • Introduction to Request Retry Strategy
      • Origin Group Configuration
      • Related References
        • ld Version Origin Group Compatible Related Issues
      • Collect EdgeOne origin-pull node IP
  • Edge Cache
    • Overview
    • EdgeOne Cache Rules
      • Content Cache Rules
      • Cache Key Introduction
      • Vary Feature
    • Cache Configuration
      • Custom Cache Key
      • Node Cache TTL
      • Status Code Cache TTL
      • Browser Cache TTL
      • Offline Caching
      • Cache Prefresh
    • Clear and Preheat Cach
      • Cache Purge
      • URL Pre-Warming
    • How to improve the Cache Hit Rate of EdgeOne
  • Rules Engine
    • Overview
    • Supported Matching Types and Actions
    • Rule Management
    • variables
Docs Overview/
Edge Acceleration/
Edge DNS/
Origin Configuration/
Load Balancing/
Related References/
Load Balancing-Related Concepts/

Load Balancing-Related Concepts

This document introduces the relevant concepts involved in Load Balancing.
Note:
Tencent Cloud EdgeOne Load Balancing feature is in beta testing. If you want to use it, you can Contact Us.

Load Balancer

A load balancer is a virtual concept, comprising Origin groups and health check policies. Within a single load balancer, up to ten origin groups can be configured in priority order, accompanied by one health check policy. The load balancer intelligently directs business traffic based on probe results and the configured traffic scheduling policy.


Origin Group

An origin group is the smallest unit of origin configuration within the Load Balancing. You can add one or more origins. When you add multiple Origin Servers, you can configure weights to adjust traffic load. For more details, see Origin Group Configuration.

Health Check Policy

The health check policy consists of probe methods and health assessment criteria. Currently, four probe methods are supported: ICMP Ping, HTTP/HTTPS, TCP, and UDP. For more details, see Detailed Health Checks.

Traffic Scheduling Policy

The traffic scheduling policy only takes effect when the health check policy is enabled. Currently, it supports a Failover-by-Priority-Order policy, that is, based on probe results, it disables failed origins and routes traffic to healthy ones according to the priority order of origin groups.

Request Retry Policy

In the event of a request failure to a particular origin during normal business operations, the Load Balancing feature, guided by its request retry policy, can schedule the request to another origin for a retry. This helps reduce business request failures due to network issues or origin malfunctions. For more details, see the Introduction to Request Retry Policy.