https://donnyeatstech.com/writing/ Long-form technical deep-dives on distributed systems, databases, and backend engineering. en Fri, 17 Jul 2026 00:00:00 +0000 https://donnyeatstech.com/writing/should-you-store-jsons-in-postgres/ https://donnyeatstech.com/writing/should-you-store-jsons-in-postgres/ Fri, 17 Jul 2026 00:00:00 +0000 A production RCA: what happens when a large JSON report lives in a jsonb column — how Postgres pages, TOAST, WAL and MVCC turn one write into thousands. https://donnyeatstech.com/writing/from-birthday-paradox-to-consistent-hashing/ https://donnyeatstech.com/writing/from-birthday-paradox-to-consistent-hashing/ Sat, 13 Jun 2026 00:00:00 +0000 How the birthday problem and balls-into-bins explain why classic consistent hashing leaves hot spots — and where the power of two choices comes in.