From Consistency to Cosmos: 12 Years of DB Evolution at DTCC (2026 Review)

In his 2026 DTCC keynote titled “The universe has no consistency, consistency exists because of us,” the speaker (known as Hai Lanlan) argues that consistency is a human‑made concept, not a natural law, and introduces the C² framework where consistency sets the upper bound and robustness the lower bound of a database system.

He illustrates this philosophy with analogies to the cosmos, explaining that just as stars collide without protection, data must be guarded by transaction mechanisms to prevent chaos, turning “order from chaos” into a concrete design principle.

The narrative then maps twelve years of his talks to thematic milestones: 2014 deep dives into storage layers, 2017 explorations of concurrency control, 2018‑19 TDSQL engineering practice, 2020‑21 multi‑level consistency models, 2022‑23 systematized transaction consistency, 2024 theoretical C²DB work, 2025 architectural reconstruction, and 2026 the philosophical “consistency architecture.”

Parallel to this personal timeline, the article surveys DTCC’s evolution: 2010‑13 a DBA‑centric era dominated by Oracle, DB2 and SQL Server; 2014‑17 a shift toward open‑source MySQL and PostgreSQL as Chinese internet firms sought cheaper alternatives; and from 2018 onward a rapid rise of domestic databases driven by the “去IOE” movement and the national “信创” initiative, turning China’s database market from a dependent “backup” role to the primary stage.

The author highlights three framework shifts—buy‑out (using foreign products), open‑source (modifying external code), and autonomous (building native solutions)—as the underlying forces reshaping the industry, rather than purely technical breakthroughs.

Finally, two forthcoming books are introduced: “Database Past,” which narrates the historical and philosophical journey of Chinese databases, and “Consistency and Concurrency: Concurrency Semantics,” which aims to distill the infinite varieties of anomalies into a single underlying semantic rule.

The piece concludes that the speaker’s twelve‑year saga demonstrates how database consistency has moved from a technical detail to a foundational architectural principle that mirrors universal order.