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CRDTs #2: Turtles All the Way Down

https://jhellerstein.github.io/blog/crdt-turtles/
53•pfarago•7h ago

Comments

holmesworcester•5h ago
What a great post! The section on expiring tombstones is a great illustration of the overall point and also helpful in practice.
AstralStorm•25m ago
Doesn't the consistent versioning approach make for eventual consistency which might never arrive? Suppose you have a node where tombstones never work...

The missing part is monitoring error conditions when it times out... Which also should be resistant to byzantine failure, so more than one monitor voting on it.

And when that happens you have to force stop the node or multiple thereof, diagnose which direction the consistency failed etc.

You need to have a well defined requirement set on the consistency and timeliness in the first place.

As far as turtles, assumption of faultlessness (of storage, of networking, of whole distributed machines, of the power supply) is one of these. The moment your CRDT starts to involve backups things get funny.

The Long Story of Liquid Ventilation

https://biostasis.substack.com/p/the-long-story-of-liquid-ventilation
1•rdl•4m ago•0 comments

OpenAI vs. R/Whereintheworld

https://www.whereisthisphoto.com/blog/openai-model-image-analysis
1•kylehigginson•8m ago•1 comments

GeoGuessr withdraws from Esports World Cup following fan backlash

https://esportsinsider.com/2025/05/geoguessr-esports-world-cup-withdrawal
2•outrunner•14m ago•0 comments

Shopify just launched a racing game built in threejs and React (R3F)

https://twitter.com/pushmatrix/status/1925584697200963958
1•taubek•16m ago•0 comments

OpenAI: Scaling PostgreSQL to the Next Level

https://www.pixelstech.net/article/1747708863-openai%3a-scaling-postgresql-to-the-next-level
1•thunderbong•16m ago•0 comments

Apple cannot miss its smart glasses swing

https://9to5mac.com/2025/05/22/apple-smart-glasses-swing/
2•fowler64•16m ago•0 comments

Vibe Code or Retire

https://www.infoworld.com/article/3960574/vibe-code-or-retire.html
1•carlos-menezes•17m ago•0 comments

I 3D printed Luigi Mangione's ghost gun

https://www.youtube.com/watch?v=tQB_ib-KQXA
1•mahmoudhossam•21m ago•0 comments

Intel direct liquid cooling for up to 1000W CPUs package-level approach

https://www.tomshardware.com/pc-components/cooling/intel-experimenting-with-direct-liquid-cooling-for-up-to-1000w-cpus-package-level-approach-maximizes-performance-reduces-size-and-complexity
1•rbanffy•21m ago•0 comments

Show HN: Square Image

https://squareimage.app/
1•artiomyak•29m ago•0 comments

CSS is easy they said

https://twitter.com/_devJNS/status/1925574688517874086
1•grxar•30m ago•0 comments

A closer look at the details behind the Go port of the TypeScript compiler

https://2ality.com/2025/03/typescript-in-go.html
1•beeburrt•33m ago•0 comments

Choose Boring Technology (2015)

https://mcfunley.com/choose-boring-technology
3•severusdd•35m ago•0 comments

Ask HN: What projects do you donate to?

1•xeonmc•37m ago•2 comments

Arrow IPC Support in DuckDB

https://duckdb.org/2025/05/23/arrow-ipc-support-in-duckdb.html
2•henrikhorluck•39m ago•0 comments

Show HN: ComputeLite: Python/R/JavaScript/SQLite in browser

https://www.ComputeLite.com
1•akhil977•43m ago•1 comments

The British Sundial Society

https://sundialsoc.org.uk/
1•jstanley•47m ago•0 comments

What Is Google Flow?

https://huzit.net/was-ist-google-flow-ki-video-tool-fuer-storyteller/
2•RobotHead•51m ago•0 comments

Robots, Small Models, and RL with DeepSeek Alumnus Zihan Wang [video]

https://www.youtube.com/watch?v=Rhb9oaCOv6Y
1•hunglee2•1h ago•0 comments

Discover Plastic: The Future of Password Storage

https://spectrum.ieee.org/plastic-data-storage
1•rbanffy•1h ago•0 comments

In 3.5 years, Notepad has gone from "barely maintained" to "it writes for you"

https://arstechnica.com/gadgets/2025/05/in-3-5-years-notepad-exe-has-gone-from-barely-maintained-to-it-writes-for-you/
2•rbanffy•1h ago•1 comments

There is no German word for "self-aware"

https://old.reddit.com/r/German/comments/a3tvsq/some_german_told_me_that_there_is_no_german_word/
2•amai•1h ago•3 comments

Ask HN: I'm suddenly hearing a lot about Quantum Computing again. Why?

3•b800h•1h ago•1 comments

My Request to Google on Accessibility

https://adrianroselli.com/2025/05/my-request-to-google-on-accessibility.html
1•agos•1h ago•0 comments

We built a Ruby library that saves 50% in testing time

https://www.datadoghq.com/blog/engineering/ruby-test-impact-analysis/
3•anvmarchenko•1h ago•0 comments

Airhull lets electric boats glide on a layer of air

https://www.heise.de/en/news/Pascal-Technologies-Airhull-lets-electric-boats-glide-on-a-layer-of-air-10392755.html
2•doener•1h ago•0 comments

AskHN: Best X (Twitter) accounts to follow for GTM and startup launch insights?

1•leo_dard•1h ago•0 comments

Card Game Rules

https://www.pagat.com/
2•Tomte•1h ago•0 comments

Sam Altman is a visionary with a trustworthiness problem

https://www.economist.com/culture/2025/05/20/sam-altman-is-a-visionary-with-a-trustworthiness-problem
2•edward•1h ago•0 comments

Letter from Home

https://bittersoutherner.com/2025/issue-10/imani-perry-letter-from-home
1•Tomte•1h ago•0 comments