The Xueersi Online School Tech Team, dedicated to innovating and promoting internet education technology.
This article explains the RTMP protocol’s handshake process, chunking and message formats, details command flows such as connect, createStream, publish and play, and describes how the Nginx‑RTMP module implements live streaming, acceleration, authentication, recording and HLS slicing.
This article explains how computers store text using binary, introduces ASCII, Unicode and UTF‑8 encoding rules, discusses the limitations of C‑style null‑terminated strings, and describes Redis's Simple Dynamic String (SDS) data structure, its old and new versions, advantages, and related APIs.
At Gopher China 2021, Go expert Yang Le Duo presented a detailed exploration of a proactive in‑memory cache architecture, describing how his team tackled real‑time data, complex queries, hot‑cold data swapping, and language constraints to improve performance and developer productivity in large‑scale streaming applications.
This article describes how the PC teacher desktop client adopts a layered MVL architecture, introduces unit testing with GoogleTest and GoogleMock, explains the underlying TEST and RUN_ALL_TESTS macro mechanisms, demonstrates mock view implementation, and shows how code coverage is measured to achieve targeted test coverage levels.
This article details the background, goals, architectural analysis, migration scope, step‑by‑step containerization process, code‑level challenges, and post‑migration results of moving a large‑scale live‑classroom platform from virtual machines to a Kubernetes‑based container environment, highlighting performance, reliability, and operational improvements.
This article explains the concepts of SSR and CSR, introduces Serverless cloud functions, details the installation and configuration steps for deploying a Serverless‑based SSR application using Tencent Cloud, and shares practical tips, component choices, and billing considerations.
This article explains why 5xx errors occur during service upgrades, describes the container and pod lifecycle in Kubernetes, and provides practical smooth‑upgrade techniques—including traffic routing, readiness probes, preStop scripts, and exec‑based entrypoints—to achieve lossless deployments for web and micro‑services.
This article analyzes why Kubernetes pods experience occasional one‑second connect() delays due to SNAT port‑collision issues in the iptables conntrack table, explains the underlying networking mechanisms, and offers practical mitigation techniques such as random‑fully SNAT selection and long‑lived connections.
This article investigates why OkHttp timeouts appear ineffective in a Retrofit‑RxJava network stack, examines the internal flow of connectTimeout, readTimeout and writeTimeout through StreamAllocation, AsyncTimeout, and the Watchdog thread, and proposes configuration adjustments to avoid request stalls.
This article provides a comprehensive guide to Redis, covering its role as a non‑relational database, detailed data types and commands, persistence mechanisms (RDB and AOF), memory eviction strategies, high‑availability features such as replication, Sentinel and clustering, and solutions to typical cache problems like penetration, avalanche, and hot‑key handling.
