Code Cùng Hợp

Code Cùng Hợp Code cùng Hợp là nơi chia sẻ kiến thức chuyên sâu về backend và hành trình từng bước để phát triển thành Solution Architect.

Cùng nhau học hỏi, chia sẻ tài liệu, kỹ năng phỏng vấn, tư duy hệ thống và lộ trình nghề nghiệp.

07/08/2026

If you can predict when a term query will return nothing — and explain why a search for "keyboards" may fail to find a d...
04/08/2026

If you can predict when a term query will return nothing — and explain why a search for "keyboards" may fail to find a document containing "keyboard" — you understand Elasticsearch text matching better than most people who query it every day.

The same analyzer runs when you index and when you search — and when it doesn't, matching silently breaks.

04/08/2026

03/08/2026

Same goals, different trade off

03/08/2026

02/08/2026
02/08/2026

Same Origin vs Different Origin Explained

If you can explain why an inverted-index lookup beats a LIKE scan, and why the source of truth still belongs in Postgres...
01/08/2026

If you can explain why an inverted-index lookup beats a LIKE scan, and why the source of truth still belongs in Postgres, you already understand what Elasticsearch is for.

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