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System Architect Go

Programming, architecture, application development, message queues, middleware, databases, containerization, big data, image processing, machine learning, AI, personal growth.

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Latest from System Architect Go

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System Architect Go

Feb 28, 2021 · Information Security

Cross-Origin Resource Sharing (CORS) and Same‑Origin Policy: Concepts, Vulnerabilities, and Mitigations

This article explains the fundamentals of Cross‑Origin Resource Sharing (CORS) and the Same‑Origin Policy, illustrates common misconfigurations and attack scenarios such as origin reflection, null origin whitelisting, and TLS downgrade, and provides best‑practice mitigation techniques for secure web development.

CORSCross-Origin AttacksSame-Origin Policy

0 likes · 20 min read

Cross-Origin Resource Sharing (CORS) and Same‑Origin Policy: Concepts, Vulnerabilities, and Mitigations

System Architect Go

Jan 28, 2021 · Information Security

OAuth 2.0 Authorization Code and Implicit Grant Flows

This article explains the OAuth 2.0 protocol, describes its four grant types, focuses on the Authorization Code and Implicit flows, outlines the involved roles, token types, client registration steps, and provides detailed request‑response examples for both grant types.

Authorization CodeImplicit GrantOAuth 2.0

0 likes · 8 min read

OAuth 2.0 Authorization Code and Implicit Grant Flows

System Architect Go

Dec 20, 2020 · Databases

Understanding the MySQL Client/Server Protocol: Connection and Replication

This article explains the MySQL client‑server communication protocol, detailing the connection phase—including handshake, authentication, and packet structure—as well as the replication process, covering registration as a slave, binlog streaming, and the various binlog event types and their formats.

Client-Server ProtocolHandshakeMySQL

0 likes · 12 min read

Understanding the MySQL Client/Server Protocol: Connection and Replication

System Architect Go

Nov 30, 2020 · Databases

Five Ways to Sync MySQL Data to Elasticsearch, Redis, MQ, etc.

This article outlines five practical methods for synchronizing MySQL data to external systems such as Elasticsearch, Redis, and message queues, covering business‑layer hooks, middleware integration, scheduled tasks using updated_at, binlog parsing with ROW format, and handling mixed or statement binlog formats, plus open‑source tools.

Data SynchronizationElasticsearchKafka

0 likes · 5 min read

Five Ways to Sync MySQL Data to Elasticsearch, Redis, MQ, etc.

System Architect Go

Nov 17, 2020 · Big Data

Elasticsearch Distributed Search Mechanisms: query_then_fetch and dfs_query_then_fetch

Elasticsearch provides two search types—query_then_fetch (default) and dfs_query_then_fetch—each involving a multi-step process where the client node distributes queries to relevant shards, shards execute searches using local or global term frequencies, aggregate results, and retrieve full documents, with noted trade‑offs.

DistributedElasticsearchSearch

0 likes · 5 min read

Elasticsearch Distributed Search Mechanisms: query_then_fetch and dfs_query_then_fetch

System Architect Go

Nov 16, 2020 · Backend Development

How to Decouple Elasticsearch Queries Using Mustache Search Templates

This article explains how to separate Elasticsearch DSL queries from application code by defining reusable search templates with Mustache placeholders, managing them via the scripts API, and rendering them with parameters to produce flexible, maintainable search requests.

DSLElasticsearchMustache

0 likes · 10 min read

How to Decouple Elasticsearch Queries Using Mustache Search Templates

System Architect Go

Nov 7, 2020 · Operations

Request Log Analysis System: Collected Fields, Derived Data, and Metrics

This article outlines a request log analysis system that records core request fields, adds proxy‑related data, derives IP‑based ASN and geographic information, parses user‑agent details, and provides comprehensive metrics such as PV/QPS, UV, traffic, latency, status monitoring, and business‑specific insights, all visualized via an ELK‑Kafka architecture.

ELKKafkaMetrics

0 likes · 5 min read

Request Log Analysis System: Collected Fields, Derived Data, and Metrics

System Architect Go

Nov 2, 2020 · Backend Development

Custom Scoring in Elasticsearch Using function_score

Elasticsearch calculates a relevance score for each document, but using the function_score query you can customize this scoring by combining the original query_score with a user-defined func_score through various functions such as weight, random_score, field_value_factor, decay_function, and script_score, allowing flexible ranking based on business needs.

Elasticsearchbackendcustom scoring

0 likes · 11 min read

Custom Scoring in Elasticsearch Using function_score

System Architect Go

Nov 1, 2020 · Big Data

Introduction to Logstash: Basics, Installation, Configuration, and Plugins

This article introduces Logstash as an open‑source data‑pipeline tool, explains why it simplifies data ingestion, filtering and output, walks through installation and a first‑pipeline example, and provides a comprehensive overview of its input, filter, and output plugins with configuration snippets.

ConfigurationELKLogstash

0 likes · 10 min read

Introduction to Logstash: Basics, Installation, Configuration, and Plugins

System Architect Go

Jun 4, 2020 · Artificial Intelligence

Evolution and Underlying Principles of the Billion‑Scale Image Search System at Youpai Image Manager

This article describes the two‑generation evolution of Youpai Image Manager's billion‑scale image search system, explaining the mathematical representation of images, the limitations of MD5, the first‑generation pHash‑ElasticSearch solution, and the second‑generation CNN‑Milvus approach for robust, large‑scale visual similarity search.

CNNMilvusimage search

0 likes · 9 min read