#datomic
Even though I mostly use #Datalog databases these days (mostly #Datomic), many #PostgreSQL tidbits make me (unreasonably?) happy. Like this one: “Aggregate first - join later”
https://www.cybertec-postgresql.com/en/super-fast-aggregations-in-postgresql-19/
Awesome to hear Davis Shepherd and Jonathan Indig from Netflix talk about how stable the Clojure / Datomic ecosystem has been over the past 10 years, especially in comparison to the number of breaking changes that other open-source infrastructure projects have gone through in the same amount of time.
The talk is called ”A Decade on Datomic” for when videos are published
Today's Google "AI overview" hallucination: "#Datomic between".
No, there is no `:between` operator in Datomic. As a Google user, I need to waste time figuring out that this is a hallucination, and then scroll down to results that actually make sense.
I'm increasingly fed up. I guess I'll just bite the bullet and switch to Kagi.
New blog post! „No, really, you can’t branch #Datomic from the past (and what you can do instead)”
https://blog.danieljanus.pl/2025/04/22/datomic-forking-the-past/
Is it possible to make a re-frame #localfirst app, syncing #datomic on the back-end and #datascript on the front-end? How would you do that?
Me finally deciding I should try #datomic, going all the way through helloworld only to realize that the "datomic local" flavor doesn’t do stored functions.
(╯°□°)╯︵ ┻━┻
So to even try those I'd have to spin up a local postgres, deploy datomic transactor, and figure the pg schema.
#xtdb looks like fun again.
I was sick for the last ~ 10 days. Done almost nothing. 🤒 Feeling kinda recovered today. 🙏 ☀️
But had some shorts moments of clarity to play with #xtdb (#clojure) https://xtdb.com
I saw it ~ year ago when it was v1. Then they've released v2 with some breaking changes.
Summary: cool idea, but still raw as f.
The last drop for me was: they have an option to add metadata to the transaction but it's hidden from the public api and the PR is there for ~ 2 years
Switching to #datomic
A little attempt at "programmer's humor", I hope you may enjoy it :-p #clojure #datomic https://news.ycombinator.com/item?id=41645499
soooo close to getting my evil #datomic on #sqlite+#litestream idea running and I’m now running into an undebuggable fly.io error 😵💫😭
Jepsen (a small consultancy focused on #distributed #systems safety) released their analysis of #Datomic safety and correctness - and concluded:
We found no behavior which violated Datomic’s core safety claims ... Indeed, we believe Datomic’s inter-transaction safety properties are stronger than promised. https://jepsen.io/analyses/datomic-pro-1.0.7075
For those of you who are Datomic users, and database users in general, I'd love to hear what you think about #Datomic's concurrent intra-transaction semantics. Do you struggle with traditional databases that let transactions observe intermediate state from earlier in the same transaction? Have you accidentally written transaction functions that assumed serial semantics? How has Datomic's model changed the way you design transactions?
🌗 Jepsen: Datomic Pro 1.0.7075
➤ Datomic Pro 1.0.7075的交易模型和一致性特性
✤ https://jepsen.io/analyses/datomic-pro-1.0.7075
本文分析了Datomic Pro 1.0.7075的交易模型和一致性特性。儘管該數據庫在交易之間的安全性方面表現出色，但在交易內部的操作則存在一致性問題。這可能違反了已被廣泛接受的三個一致性定義，也可能導致不變式違反。該分析工作由Nubank（Nu Pagamentos S.A）資助，按照Jepsen的道德政策進行。
+ 這篇文章很好地分析了Datomic Pro 1.0.7075的一致性問題，讓人對這個數據庫的性能有了更深入的瞭解。
+ 在進行交易時確保一致性是非常重要的，對於使用Datomic Pro 1.0.7075的人來說，這篇文章提供了有價值的洞察。
#Datomic Pro 1.0.7075 #OLTP數據庫 #平行一致性
As it is getting spring over here in the northern hemisphere, time to get the garden ready. https://application.garden I mean.
I've been moaning for something like this for years: just push a #Clojure app via git to application.garden and it will run it for you within seconds, complete with persistent storage, ability to use #Datomic and a on a domain of your choosing. No Docker, no <insert fancy pants tech stack no one understands here>.
Oh, and you can connect to the running app with your REPL♻️
We, Sharetribe, are launching tomorrow on Product Hunt! 🚀
Sharetribe is a no-code marketplace builder fully extendable with code.
And Sharetribe is built with your favorite tech stack, #clojure, #clojurescript, and #datomic! ❤️
I'd love it if you could follow our page and support us at https://www.producthunt.com/products/sharetribe !
Read more about us at https://www.sharetribe.com/
This is a really well done tutorial on datalog, https://www.learndatalogtoday.org #clojure #datalog #datomic
@haskman now if we could just replace Postgres with a functional database such as Datomic. Actually that's the only one I know of and sadly because it was closed source and commercially licensed very few other people have heard of it or used it. But I love the concept because fundamentally data isn't mutable, that's just an aberation of our desire to snapshot a view ignoring time.