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Xueersi Online School Tech Team

The Xueersi Online School Tech Team, dedicated to innovating and promoting internet education technology.

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Latest from Xueersi Online School Tech Team

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Xueersi Online School Tech Team

Nov 1, 2019 · Backend Development

Understanding Nginx Process Management: Signals, Master‑Worker Loops, and Worker Initialization

This article explains how Nginx creates and controls its master and worker processes using Linux signals, global flag variables, and a series of initialization steps—including signal handling, process spawning, socketpair communication, and worker loop execution—to achieve robust, high‑concurrency request handling.

Backendmaster-workernginx

0 likes · 14 min read

Understanding Nginx Process Management: Signals, Master‑Worker Loops, and Worker Initialization

Xueersi Online School Tech Team

Oct 25, 2019 · Backend Development

Understanding Nginx Configuration Parsing: Data Structures, ngx_conf_parse, and HTTP Block Processing

This article explains how Nginx parses its configuration file by introducing the core data structures ngx_conf_t and ngx_command_t, describing the versatile ngx_conf_parse function, and detailing the step‑by‑step processing of HTTP, server, and location blocks, including conflict resolution.

BackendHTTPconfiguration

0 likes · 18 min read

Understanding Nginx Configuration Parsing: Data Structures, ngx_conf_parse, and HTTP Block Processing

Xueersi Online School Tech Team

Oct 18, 2019 · Backend Development

Understanding Nginx Startup Process and Core Design Principles

This article explores Nginx’s elegant architecture, detailing its master‑worker process model, modular design, event‑driven engine, and the step‑by‑step initialization sequence—including command‑line parsing, cycle creation, container setup, configuration parsing, socket inheritance, and listening socket creation—based on version 1.15.8.1.

BackendC++Event-driven

0 likes · 25 min read

Understanding Nginx Startup Process and Core Design Principles

Xueersi Online School Tech Team

Oct 12, 2019 · Backend Development

Understanding Swoole Coroutines: Architecture, Zend VM Integration, and Implementation Details

This article explains the concept and history of coroutines, surveys language support, and provides an in‑depth analysis of Swoole’s coroutine implementations from version 1.x to 4.x, including PHP Zend VM integration, C‑stack management with assembly, and practical code examples.

C++PHPSwoole

0 likes · 23 min read

Understanding Swoole Coroutines: Architecture, Zend VM Integration, and Implementation Details

Xueersi Online School Tech Team

Sep 27, 2019 · Big Data

Design Principles and Architecture of Apache Kylin for Sub‑Second OLAP Queries

This article explains how Apache Kylin, an open‑source distributed analytics engine built on Hadoop/Spark, achieves sub‑second OLAP query performance through pre‑computed cubes, a layered cuboid generation algorithm, bitmap‑based distinct counting, dimension optimization techniques, and tight integration with HBase for storage and fast SQL querying.

Apache KylinBig DataCube

0 likes · 15 min read

Design Principles and Architecture of Apache Kylin for Sub‑Second OLAP Queries

Xueersi Online School Tech Team

Sep 20, 2019 · Operations

WebRTC Domestic Acceleration Mirror and Compilation Guide

This article explains the background, principles, and step‑by‑step instructions for using a non‑intrusive domestic mirror to accelerate WebRTC dependency synchronization and compilation across macOS, iOS, Linux, Android, and Windows platforms, including proxy configuration and repository URL replacement.

DevOpsMirrorProxy

0 likes · 18 min read

WebRTC Domestic Acceleration Mirror and Compilation Guide

Xueersi Online School Tech Team

Sep 6, 2019 · Big Data

Real-Time Data Architecture, Evolution, and Applications at an Online School

The article details the six‑layer big‑data architecture of an online school, chronicles its migration from Storm to Spark Streaming and finally to Flink, and showcases concrete real‑time applications such as gateway monitoring, user‑profile tagging, renewal reporting, and advertising analysis, while outlining future development directions.

AnalyticsBig Data ArchitectureFlink

0 likes · 14 min read

Real-Time Data Architecture, Evolution, and Applications at an Online School

Xueersi Online School Tech Team

Sep 1, 2019 · Databases

Elasticsearch Data Write Process: Coordinating Node Phase Explained

This article explains how Elasticsearch handles data ingestion by detailing the roles of cluster nodes, the coordinating node workflow, index structures, shard allocation, request validation, pipeline processing, automatic index creation, and the underlying code paths involved in the write operation.

Bulk RequestClusterCoordinating Node

0 likes · 25 min read

Elasticsearch Data Write Process: Coordinating Node Phase Explained

Xueersi Online School Tech Team

Aug 23, 2019 · Fundamentals

Understanding the Qt Signals and Slots Mechanism Through Source Code Analysis

This article provides a detailed, step‑by‑step explanation of Qt's signals‑and‑slots system, covering its core concepts, the role of the Meta‑Object Compiler (moc), generated code structures, connection types, and runtime activation, illustrated with a concrete demo project and reference images.

C++GUI DevelopmentMOC

0 likes · 12 min read

Understanding the Qt Signals and Slots Mechanism Through Source Code Analysis

Xueersi Online School Tech Team

Aug 9, 2019 · Fundamentals

Understanding Go (Golang) Memory Allocation and Management in Go 1.12.6

This article examines Go's memory allocation mechanisms in version 1.12.6, detailing the roles of spans, mcache, mcentral, and mheap, explaining tiny, small, and large object handling, and describing GC and heap reclamation improvements for efficient runtime performance.

Goallocationgc

0 likes · 16 min read

Understanding Go (Golang) Memory Allocation and Management in Go 1.12.6