Blog

Engineering notes on databases, search, and AI infrastructure by the Cognica team.
Insights23 min read

The Missing Layer: A Structural Gap in the AI Infrastructure Stack

by Jaepil Jeong | April 10, 2026

Between models and hardware lies an invisible structural gap — a data layer that should exist but doesn't. We examine why the current AI infrastructure stack is fragmented, why this is a structural problem rather than a transitional one, and what conditions a proper solution must satisfy. We then present UQA and the Cognica engine as one concrete response to these conditions.

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Insights4 min read

An AI Database That Works Identically On-Device

by Tim Yang | December 23, 2025

We examine the database architecture changes required by on-device AI. Just as SQLite was the answer for on-device computing, on-device AI requires a new database that integrates transactions, analytics, full-text search, and vector search. We explain why Cognica works identically on-device and on servers.

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Insights3 min read

Distributed Databases: A Structural Constraint in the AI Era

by Tim Yang | November 17, 2025

Exploring how function-based distributed database architectures become structural constraints in the AI era. We examine the limitations and complexity of traditional approaches combining OLTP, OLAP, FTS, and Vector DB, and introduce Cognica's unified database as a technical turning point.

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Insights6 min read

Why a Single Database?

by Tim Yang | November 11, 2025

Moving beyond the complexity and limitations of the era of specialized databases, we explore why a unified database is now essential. Discover the value of Cognica's integrated database that provides OLTP, OLAP, cache, FTS, and vector search in a single engine, and the future direction of databases in the AI era.

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Insights5 min read

Why Did OpenAI Acquire Rockset?

by Tim Yang | July 11, 2024

On June 21, 2024, OpenAI announced the acquisition of database startup Rockset. According to OpenAI, the background of the Rockset acquisition is to improve search infrastructure to make AI more useful. Specifically, what advantages led OpenAI to acquire Rockset?

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Insights3 min read

Why Vector Databases Are Essential for Recommendation Systems

by Tim Yang | September 16, 2023

Many services are introducing recommendation systems to increase user retention time in modern applications, and this is an important factor directly related to sales, especially in content and e-commerce sectors. Recommendation systems analyze user behavior to understand their interests and provide related items, thereby increasing retention time and inducing purchases. How can vector databases be utilized in this context?

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Insights4 min read

Why We Need Vector Search

by Tim Yang | September 14, 2023

The mobile applications and web services we use have search functions. Most are developed using basic text search provided by databases or full-text search provided by search engines like Elasticsearch. Full-Text Search is one of the traditional methods mainly used for searching text data, focusing on finding specific keywords, words, phrases, etc., in documents, web pages, databases, and more. It typically involves inputting keywords or short sentences to search text data and finding documents that match the keywords, but it does not consider context or semantic similarity.

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