Leiden.dev • Mapping the Cloud with Elixir • IT events & incident management

July edition

How managing an IT event taught me everything I needed to know about Incident Management by Adam Castle
A lightning talk about managing an IT event and the incidents that happened. What went wrong and could we have anticipated it? How do you deal with unknown unknowns? And most importantly: what did we learn?

Mapping the Cloud with Elixir by Peter Ullrich
The “Cloud” sometimes feels like this abstract thing you deploy your server to and otherwise forget about. But what does it look like? What pathways connect this globally spanning network of datacenters? I used Elixir to find out.
I deployed an Erlang cluster of tiny probes across 100+ datacenters on AWS, GCP, and Azure, collecting months of traceroute data in TimescaleDB to map the hidden topology of the cloud. This talk explores how I deployed the probes efficiently and cheaply, what the data revealed, and the practical challenges of running a globally distributed Elixir system.

Doors open at 19:00
Talks start at 19:30

📅 Thursday, 16 July 2026 🕒 19:00 - 22:00
📍 Café De Keyzer, Kaiserstraat 2-4, Leiden (city center)
❣️ Upstairs