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Talks

Semantic Searching with RAG and Ruby

  • Dan Milne

Dan Milne

08 May 2025

Hey! I did a talk at Ruby Australia on how to build a Semantic Search system using Ruby.

I really enjoyed building this little demonstration toy. I first got a glimpse of how they work with Simon Willison's excellent video "Embeddings: What they are and why they matter"

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Nipsu

15 Aug 2025

Migrating PostgreSQL across the planet, with almost no downtime.

TL;DR: Using PostgreSQL logical replication and Tailscale VPN, I migrated 200GB of data from California to Sydney with seconds of downtime and no time pressure. The replica synchronized over several days while production ran normally.
07 Aug 2025 7 min read

Using PostgreSQL Tablespaces on your VPS

Moving PostgreSQL indexes to the local NVMe drive from Hetzner's remote volumes boosted TPS by 86% (3,161→5,870). Using tablespaces to split storage between fast local and slower remote disks gives massive performance gains for free when your database is too big for the local drive alone.
04 Aug 2025 5 min read
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