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An interactive intro to CRDTs (jakelazaroff.com)

922 points by jakelazaroff · 1055 days ago · 130 comments on HN

Article summary

The article introduces Conflict-free Replicated Data Types (CRDTs), a type of data structure that allows for collaborative editing without a central server. It explains the basics of CRDTs, including state-based and operation-based CRDTs, and provides examples of how they can be used to build collaborative applications. The article also discusses the Last Write Wins Register and Map, two simple CRDTs that can be combined to create more complex data structures. The goal of the article is to provide an interactive introduction to CRDTs and demonstrate their potential for building rich collaborative apps.

Main themes

  • CRDTs
  • collaborative editing
  • distributed systems
  • data structures
  • conflict resolution
  • operational transforms
  • text editing
  • collaborative apps

What commenters say

  • CRDTs are a powerful tool for building collaborative applications, but they can be complex and difficult to understand.
  • The use of text editing as a example for CRDTs is not ideal, as it is a niche and complex problem.
  • CRDTs may not be suitable for all types of data, such as age or date of birth, which can be subject to errors or changes.
  • Some commenters argue that CRDTs are not widely used in production, while others mention examples of companies that are working on implementing CRDTs in their products.
  • The choice of CRDTs versus other technologies, such as operational transforms, depends on the specific use case and requirements.
  • CRDTs can be used to solve specific problems, such as collaborative editing, but may not be a general solution for all distributed systems problems.
  • The article's examples, such as the painting app, are too simple and do not demonstrate the full potential of CRDTs.
  • Some commenters believe that CRDTs have the potential to simplify the development of collaborative applications, but others are skeptical about their usefulness.