Prague PostgreSQL Meetup #7

We are excited to announce our October meetup! The Seventh event of 2026 will take place on Friday, October 30th at 17:30 at Dataddo (Pod Dráhou 1637/6 (PORT7, building E3 - Dataddo offices 7th floor).

Lightning talks Submissions => [email protected]

Agenda:
17:30 Doors open
17:45 - 18:00 Dataddo - Host Introductory talk
18:00 - 18:30 DIY Branching in Postgres by Radim Marek
18:30 - 18:45 Coffee Break
18:45 - 19:00 Lightning Talks (Sergey Chehuta -- Developing Cloomba)
19:00 - 19:30 Introduction to Lakehouse with PostgreSQL by Josef Šimánek
19:30 - 20:30 Networking
20:30 End of event

Speakers:
Josef Šimánek is an open source enthusiast with contributions to PostgreSQL itself, former maintainer of RubyGems.org and RubyGems/Bundler projects and currently 11 years in FUGA (fuga.com).

Radim Marek spent two decades managing systems where the database was everyone's least favorite conversation. He is now the person who starts that conversation on purpose.

He writes about PostgreSQL at boringSQL.com, focusing on storage internals, query plans, and the fundamentals most developers skip until something breaks at 3am. He also builds open-source tools under the boringSQL banner and speaks at conferences about the things that feel boring right up until they page you.

Talks details :
DIY Branching in Postgres by Radim Marek
A database branch is a copy of data that starts shared and diverges on first write. That's it. Your filesystem has done this since 2005.

But a clone and a branch aren't the same thing.

I wrote about the simplest version: CREATE DATABASE as a zero-copy cloning machine. A single config change that drops a 6 GB clone from 67 seconds to 212 milliseconds on any filesystem that supports reflinks. A clone gives you an instant copy of data right now. A branch gives you a copy of data at any point in the past, one that can diverge, catch up, or be discarded. That second thing requires WAL replay, which is what Neon actually built.

This talk works through the available option. From what runs on your laptop tonight to what takes a team to operate and tries to be honest about where each one breaks down. You'll leave with a clearer picture of what you actually need, and what it would take to build it yourself.

Introduction to Lakehouse with PostgreSQL by Josef Šimánek :
Everything you want to know about open source Lakehouse. How to connect PostgreSQL to Datalakes and do an object storage based OLAP backed by transactional database.

Looking forward to meeting you all again!

https://www.meetup.com/prague-postgresql-meetup/events/316809979/