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Load Balancing

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718 articles
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Tencent Database Technology
Tencent Database Technology
Oct 20, 2021 · Databases

Percona Thread Pool Implementation and TXSQL Optimizations: Architecture, Dynamic Switching, Load Balancing, and Disconnection Handling

This article explains the background, principles, architecture, and detailed implementation of Percona's thread pool, and describes TXSQL's dynamic thread‑pool activation, load‑balancing strategies, disconnection optimizations, related configuration parameters, status variables, and a concise summary.

Database performanceMySQLPercona
0 likes · 27 min read
Percona Thread Pool Implementation and TXSQL Optimizations: Architecture, Dynamic Switching, Load Balancing, and Disconnection Handling
Tencent Database Technology
Tencent Database Technology
Dec 28, 2017 · Databases

CDB for MySQL Read-Only Instances and RO Group Architecture and Features

This article explains the architecture and key features of CDB for MySQL read-only instances and RO groups, including read-write separation, horizontal scaling, automatic load balancing, health checks, and dynamic instance removal for high-delay instances.

Database ScalingMySQLRO Group
0 likes · 5 min read
CDB for MySQL Read-Only Instances and RO Group Architecture and Features
政采云技术
政采云技术
Jan 10, 2024 · Operations

Understanding and Improving Elasticsearch Shard Balancing Strategies

This article analyzes Elasticsearch shard imbalance incidents, explains the built‑in shard balancing algorithm and its configuration parameters, demonstrates weight calculations with source code, and proposes practical improvements—including shard count adjustments and a custom load‑aware balancing tool—to achieve more effective cluster load distribution.

Cluster OperationsElasticsearchPerformance Optimization
0 likes · 17 min read
Understanding and Improving Elasticsearch Shard Balancing Strategies
政采云技术
政采云技术
Mar 29, 2020 · Backend Development

Understanding Nginx Load Balancing

This article explains how Nginx implements load balancing, covering algorithms like round-robin and IP hash, and provides a practical setup guide using Node.js and Nginx.

Cloud ComputingNginxbackend development
0 likes · 13 min read
Understanding Nginx Load Balancing
Sohu Tech Products
Sohu Tech Products
Jul 19, 2023 · Backend Development

Understanding RocketMQ Consumption Logic in Version 4.9.x

This article provides a comprehensive walkthrough of RocketMQ 4.9.x consumption architecture, covering the four core roles, publish‑subscribe model, storage structures, load‑balancing, long‑polling, concurrent and ordered consumption flows, progress persistence, and retry mechanisms, with illustrative diagrams and code snippets.

ConsumerRetryRocketMQ
0 likes · 28 min read
Understanding RocketMQ Consumption Logic in Version 4.9.x
Sohu Tech Products
Sohu Tech Products
Aug 10, 2022 · Backend Development

Designing a High-Concurrency Ticket Booking System with Load Balancing, Nginx Weighted Round Robin, and Redis

This article presents a comprehensive design and implementation of a high‑concurrency train‑ticket flash‑sale system, covering distributed architecture, load‑balancing strategies, Nginx weighted round‑robin configuration, Go‑based services, Redis‑backed stock management, and performance testing results.

Distributed ArchitectureGoHigh Concurrency
0 likes · 20 min read
Designing a High-Concurrency Ticket Booking System with Load Balancing, Nginx Weighted Round Robin, and Redis
JD Tech
JD Tech
Jan 20, 2022 · Backend Development

Consistent Hash Algorithm and Its Application in Dubbo Load Balancing

This article explains the principles of consistent hashing, its data‑skew issue, how virtual nodes mitigate that problem, and demonstrates the implementation and usage of ConsistentHashLoadBalance in Dubbo with detailed code analysis and practical load‑balancing examples.

Consistent HashDubboJava
0 likes · 14 min read
Consistent Hash Algorithm and Its Application in Dubbo Load Balancing
JD Tech
JD Tech
Nov 29, 2021 · Fundamentals

Four‑Tier Load Balancer (FLB): Topology, NAT Model, and Direct Route Model

The article explains four‑tier load balancer fundamentals, detailing its OSI‑layer‑4 topology, then derives and compares the NAT and Direct Route (DR) models, highlighting their mechanisms, advantages, drawbacks, and deployment constraints, with illustrative network diagrams.

Direct RouteNATNetwork Fundamentals
0 likes · 6 min read
Four‑Tier Load Balancer (FLB): Topology, NAT Model, and Direct Route Model
JD Tech
JD Tech
Jun 7, 2021 · Operations

Configuring Nginx Reverse Proxy for Persistent (Keep‑Alive) Connections and Performance Optimization

This article explains how to configure Nginx as a reverse proxy to maintain long‑lived HTTP/1.1 keep‑alive connections between client and Nginx and between Nginx and upstream servers, covering required directives, upstream and location settings, performance implications for high QPS workloads, and advanced WebSocket handling.

HTTPNginxPerformance
0 likes · 9 min read
Configuring Nginx Reverse Proxy for Persistent (Keep‑Alive) Connections and Performance Optimization
JD Tech
JD Tech
Mar 14, 2019 · Operations

Understanding Server Clustering and Load Balancing: LVS, Nginx, and HAProxy

This article explains server clustering and load‑balancing concepts, detailing the architecture and operation of LVS, Nginx, and HAProxy, and compares their advantages, disadvantages, and typical deployment scenarios; it also discusses NAT and DR modes, load‑balancer placement, and best‑practice recommendations for different traffic volumes.

HAProxyLVSNginx
0 likes · 12 min read
Understanding Server Clustering and Load Balancing: LVS, Nginx, and HAProxy
JD Tech
JD Tech
May 2, 2018 · Operations

ContainerLB: A High‑Performance, High‑Reliability Distributed Load Balancer Based on Intel DPDK for JD.com

The article presents ContainerLB, a software‑defined L4 load‑balancing service built on Intel DPDK and X86 servers for JD.com, detailing its architecture, FULLNAT mode, high‑availability design, performance optimizations, and test results that demonstrate near‑line‑rate packet processing and scalable deployment in a container‑native data‑center.

ContainerDPDKFULLNAT
0 likes · 14 min read
ContainerLB: A High‑Performance, High‑Reliability Distributed Load Balancer Based on Intel DPDK for JD.com
JD Tech Talk
JD Tech Talk
Aug 3, 2024 · Operations

Evolution of Load Balancing Strategies in JD Advertising Online Model System

This article examines the progression of load‑balancing techniques used in JD's advertising online model system, analyzing current challenges, outlining requirements, reviewing static and dynamic strategies, and presenting a multi‑objective, hierarchical approach that improves service availability, resource utilization, and overall system stability.

Dynamic Schedulingdistributed systemsload balancing
0 likes · 14 min read
Evolution of Load Balancing Strategies in JD Advertising Online Model System
JD Tech Talk
JD Tech Talk
Jan 6, 2021 · Backend Development

JDDLB Architecture and QAT SSL/TLS Hardware Acceleration Optimization

This article details the overall architecture of JD.com Data Science's JDDLB load balancer, its high‑performance and high‑availability features, and presents a comprehensive performance comparison of SSL/TLS offloading using Intel QAT acceleration cards, including async processing, user‑space driver zero‑copy implementation, crash analysis, and process‑level engine scheduling.

Hardware OffloadNginxPerformance Optimization
0 likes · 13 min read
JDDLB Architecture and QAT SSL/TLS Hardware Acceleration Optimization
JD Tech Talk
JD Tech Talk
Oct 28, 2020 · Backend Development

Performance Optimization of SSL/TLS in JD.com JDDLB Load Balancer Using Freescale Acceleration Cards

This article describes the architecture of JD.com’s JDDLB public‑traffic load balancer and details how offloading CPU‑intensive SSL/TLS cryptographic operations to Freescale C291 acceleration cards—via custom NGINX modules, OpenSSL Engine integration, and synchronous/asynchronous driver interfaces—significantly improves connection‑establishment rates and overall throughput.

NginxOpenSSLSSL/TLS
0 likes · 30 min read
Performance Optimization of SSL/TLS in JD.com JDDLB Load Balancer Using Freescale Acceleration Cards
Ctrip Technology
Ctrip Technology
Mar 6, 2025 · Backend Development

Design and Implementation of Ctrip's Soft Load Balancer: Evolving from Nginx Reverse Proxy to an OpenResty‑Based API Gateway

This article details how Ctrip's Soft Load Balancer (SLB) transitioned from a simple Nginx reverse‑proxy to a multi‑datacenter, dynamic routing gateway using OpenResty, Lua scripts, and a three‑layer architecture that eliminates reloads and supports high‑frequency configuration updates.

API gatewayLuaNginx
0 likes · 14 min read
Design and Implementation of Ctrip's Soft Load Balancer: Evolving from Nginx Reverse Proxy to an OpenResty‑Based API Gateway
Ctrip Technology
Ctrip Technology
Apr 14, 2022 · Backend Development

Implementing QUIC in Trip.com App: Server Architecture, Connection Migration, and 0‑RTT Optimization

This article describes how Trip.com’s backend engineers introduced QUIC to the Trip.com App, redesigned the Nginx‑based server architecture for multi‑process deployment, solved connection‑migration challenges with a custom load‑balancing layer, and enabled 0‑RTT support using shared ticket keys, achieving roughly a 20% reduction in request latency.

0-RTTConnection MigrationNginx
0 likes · 16 min read
Implementing QUIC in Trip.com App: Server Architecture, Connection Migration, and 0‑RTT Optimization
Ctrip Technology
Ctrip Technology
Mar 17, 2022 · Cloud Native

High‑Performance Layer‑4 Software Load Balancer TDLB Based on DPVS and DPDK

The article describes how Trip.com built a high‑performance, software‑based layer‑4 load balancer (TDLB) using DPVS and DPDK, detailing its lock‑free session handling, user‑IP pass‑through, asynchronous logging, cluster session synchronization, resource isolation, configuration management via etcd/operator, health‑check strategies, and multi‑dimensional monitoring.

DPDKDPVSKubernetes
0 likes · 13 min read
High‑Performance Layer‑4 Software Load Balancer TDLB Based on DPVS and DPDK
Ctrip Technology
Ctrip Technology
Dec 12, 2019 · Backend Development

Improving Load Balancing for a Compute‑Intensive Ticket Query Engine with a Pooling Strategy

The article analyzes why a round‑robin load‑balancing approach caused severe response‑time spikes in Ctrip's compute‑intensive international ticket query engine and demonstrates how switching to a proactive pooling model using a Redis‑backed queue eliminated the spikes and reduced average latency by about 20%.

Performance OptimizationRedisbackend
0 likes · 6 min read
Improving Load Balancing for a Compute‑Intensive Ticket Query Engine with a Pooling Strategy
Ctrip Technology
Ctrip Technology
Jul 20, 2017 · Operations

Ctrip's Fourth‑Generation Architecture: Elastic Routing (SLB) and the TARS Release System

This article reviews Ctrip's two‑year architecture transformation, describing how the company replaced hardware load balancers with a software‑defined SLB, introduced application‑level grouping, multi‑update mechanisms, health‑check sharing, monitoring, and the TARS release platform to achieve faster, more reliable deployments.

CtripOperationsRelease Management
0 likes · 16 min read
Ctrip's Fourth‑Generation Architecture: Elastic Routing (SLB) and the TARS Release System