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tonsky
datascript
Clojure2014–2026
tonsky / datascript

datascript

Immutable database and Datalog query engine for Clojure, ClojureScript and JS

Data & DatabasesLanguages & Compilers
Explore on GitHubRead Hacker News discussions
55Distinct people
74Mentions
0Explicit recommenders
5.8KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Immutable database and Datalog query engine for Clojure, ClojureScript and JS

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 6:01:08 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year74 dated mentions

Observed mentions: 2014-04-24 14:32:47 UTC to 2026-09-03 15:53:42 UTC.

0369122014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments20142015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 10 mentions; 5 submissions, 5 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 7 mentions; 1 submissions, 6 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 6 mentions; 1 submissions, 5 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 11 mentions; 3 submissions, 8 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 9 mentions; 2 submissions, 7 comments20202021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 6 mentions; 0 submissions, 6 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 4 mentions; 0 submissions, 4 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 8 mentions; 1 submissions, 7 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-01-01 00:00:00 UTC to 2027-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments. Incomplete calendar period.2026*

* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC413
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC1055
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC303
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC716
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC615
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC1138
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC927
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC413
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC606
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC404
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC817
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC000
2026 (partial)2026-01-01 00:00:00 UTC2027-01-01 00:00:00 UTC202

What Hacker News says

10 sources
espeed·Nov 19, 2015
Datomic's immutable storage and time-travel query capabilities are awesome, and I often miss them in other DBs. But Datomic currently isn't designed for write-intensive workloads. And while you can shard Datomic's transactor and then combine multiple DBs in a query (http://nosql.mypopescu.com/post/19310504456/thoughts-about-d...), that's only going to get you so far. However, Apache Geode lets you add custom indexes so it might not be too hard to add Clojure's persistent data structures as a custom index scheme and hook in Apache Geode as a backend to Clojure Datalog: Clojure Datalog: https://github.com/fogus/bacwn Datscript: https://github.com/tonsky/datascript Clojure's Persistent Data Structures for Java: https://github.com/grignaak/clj-ds
In Apache Geode: Distributed, in-memory database
onetom·Sep 20, 2015
It is closed source, just like DynamoDB. However - unlike DynamoDB - it has a quite usable free version and an even better starter version, which are good enough for production use. (The DDB local version is really only good for development) By production use, I mean for example a non-replicated MongoDB/PgSQL/MySQL, which is what I see from many smaller companies... They would be already really better of with Datomic. If you really need more features, like high availability and transparent query caching with memcached, then the cheapest paid version has a one-time cost of $3000: http://www.datomic.com/pricing.html You can easily save that amount of money by not spending 3-6 months developing tons of unnecessary queries, try to maintain that code and try to optimize its performance for scale... On the "open-sourceness" note, I feel obliged
Read the rest
to mention https://github.com/tonsky/datascript which IS open-source, and has a Datomic-like interface, but it's "just" an in-memory implementation. But we are getting off-topic here I guess...
In AWS US East is experiencing high error rates on several services

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