--- title: "Aurora DSQL: Scalable, Multi-Region OLTP" url: https://daily.dev/posts/aurora-dsql-scalable-multi-region-oltp-vavvmhnzn source_url: https://muratbuffalo.blogspot.com/2026/07/aurora-dsql-scalable-multi-region-oltp.html type: article source: "Metadata" published: 2026-07-24T00:19:22.418Z updated: 2026-07-28T17:29:48.574Z tags: ["postgresql"] reading_time: 6 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Aurora DSQL: Scalable, Multi-Region OLTP **[Metadata](https://daily.dev/sources/muratbuffalo)** · 6 min read · 0 upvotes · 0 comments ## Summary A deep technical analysis of the Aurora DSQL architecture paper by a former AWS team member who worked on the project. The post breaks down DSQL's core design philosophy of 'exploding the monolith' into independent horizontally scalable services: Query Processors, Storage Nodes, Adjudicators, Journals, and Crossbars. Key architectural bets include relying on synchronized physical clocks (AWS TimeSync) for coordination-free reads, Optimistic Concurrency Control paired with MVCC under Snapshot Isolation, strong linearizable consistency, hard transaction size caps (3,000 rows / 10MiB), and a Warp-inspired single-leader 2PC optimization. The payoff is 0-RTT consistent reads, 1-RTT commits, independent scalability of compute/storage/commit layers, and no pessimistic lock contention. Tradeoffs include write-write conflicts on hot keys under OCC, WAN latency penalties before conflict detection in multi-region scenarios, and friction with foreign key constraints and high-locality sequences. The author also reflects on how reusing existing AWS infrastructure (Journals, PostgreSQL engine) and strong upfront design made building a novel global database surprisingly tractable. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#postgresql](https://daily.dev/tags/postgresql) [View this post on daily.dev](https://daily.dev/posts/aurora-dsql-scalable-multi-region-oltp-vavvmhnzn)