https://tuanhiep.github.io/posts/Recent content in Posts on Tuan Hiep TRAN — System Design & AI InfraHugoen-usSat, 09 May 2026 12:04:39 -0700https://tuanhiep.github.io/posts/series_3/2.global_flash_sale_engine_admission/Sat, 09 May 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_3/2.global_flash_sale_engine_admission/Auto-scaling alone cannot save you from TCP connection exhaustion. We architect a Virtual Waiting Room using Async Polling with Jitter, Edge Bot Defense, and Cryptographic Tokens to decouple traffic flow from inventory capacity.https://tuanhiep.github.io/posts/series_3/1.global_flash_sale_engine_thundering_herd/Sat, 02 May 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_3/1.global_flash_sale_engine_thundering_herd/You don’t survive a flash sale by scaling up your database. You survive by ruthlessly shaping and dropping traffic before it reaches your core.https://tuanhiep.github.io/posts/series_2/4.global_payment_gateway_reconciliation/Fri, 24 Apr 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_2/4.global_payment_gateway_reconciliation/Internal systems do not become correct at the API boundary; they become correct through reconciliation with external truth.https://tuanhiep.github.io/posts/series_2/3.global_payment_gateway_ledger/Sat, 18 Apr 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_2/3.global_payment_gateway_ledger/Balance is a lie; the journal is the truth. Explore how to architect a high-throughput ledger that preserves financial correctness under extreme concurrency.https://tuanhiep.github.io/posts/series_2/2.global_payment_gateway_sagas/Sat, 11 Apr 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_2/2.global_payment_gateway_sagas/Why Two-Phase Commit (2PC) fails at scale, and how to architect the Saga Pattern and Transactional Outbox to guarantee data consistency across microservices.https://tuanhiep.github.io/posts/series_2/1.global_payment_gateway_idempotency/Fri, 03 Apr 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_2/1.global_payment_gateway_idempotency/Exactly-once delivery is an illusion in distributed networks. In this post, we architect an Idempotent Payment API to guarantee financial correctness amidst network timeouts, race conditions, and retry storms.https://tuanhiep.github.io/posts/series_1/4.stock_exchange_tradeoffs/Sun, 29 Mar 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_1/4.stock_exchange_tradeoffs/When does the LMAX Disruptor fail? We explore the CAP theorem, quantify the brutal costs of Kernel Bypass, and provide a strict decision framework for system design.https://tuanhiep.github.io/posts/series_1/3.stock_exchange_architecture/Sun, 22 Feb 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_1/3.stock_exchange_architecture/How to survive hardware crashes without a database. We explore Event Sourcing, the Sequencer pattern, and UDP Multicast to achieve 99.999% uptime in a single-threaded architecture.https://tuanhiep.github.io/posts/series_1/2.stock_exchange_matching_engine/Fri, 20 Feb 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_1/2.stock_exchange_matching_engine/Why multi-threading kills High-Frequency Trading systems. We explore lock-free concurrency, Mechanical Sympathy, and the LMAX Disruptor pattern to achieve sub-microsecond matching.https://tuanhiep.github.io/posts/series_1/1.stock_exchange_order_book/Wed, 18 Feb 2026 00:00:00 +0000https://tuanhiep.github.io/posts/series_1/1.stock_exchange_order_book/Designing a high-frequency trading Order Book. We formalize memory layout, trace state execution, and achieve strict O(1) cancellations.https://tuanhiep.github.io/posts/0.my_blog_system_design/Fri, 29 Aug 2025 00:00:00 +0000https://tuanhiep.github.io/posts/0.my_blog_system_design/A personal space to explore system design, AI infrastructure, and deep reflections on the world of technology.