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CRDTs: The Hard Parts

Martin Kleppmann · talk · Watch on YouTube

Distributed systemsAlgorithms & data structures

What it is

Martin Kleppmann surveys current research on CRDTs, the algorithms for merging concurrent edits across offline replicas. He covers the hard parts such as rich text, moves and merge results that are technically correct but poor.

Why Hacker News recommends it

Recommended as an excellent first education on CRDTs and their limits.

  • 3 people recommended it
  • 3 different months
  • 1 strong recommendations
  • first 2020, last 2024

What HN commenters said

  1. “I found this video from him to be an excellent first education on CRDTs”

    Excellent first education on CRDTs, their uses and limits.

    rkangel, 2021-01 · Strong recommendation · in “Decentralised Content Moderation”

  2. “Here's some introductory material I found helpful”

    Listed among helpful introductory material.

    iamwil, 2024-01 · Recommendation · in “CRDTs Turned Inside Out”

  3. “This beautiful talk has some examples”

    Shows examples of technically correct but bad merge results.

    williamstein, 2024-12 · Recommendation · in “Lies I was told about collab editing, Part 1: Algorithms for offline editing”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: crdt, collaborative editing, distributed systems, automerge, replication

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