[HN Gopher] Datomic and Content Addressable Techniques
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Datomic and Content Addressable Techniques
Author : lvh
Score : 106 points
Date : 2024-09-16 15:53 UTC (7 hours ago)
(HTM) web link (www.latacora.com)
(TXT) w3m dump (www.latacora.com)
| linotype wrote:
| Separate question: are there any new startups out there writing
| code primarily in Clojure?
| ekzy wrote:
| There are quite a few! We do at Doccla (and we're hiring :)
| (EU))
| ska80 wrote:
| > EU
|
| :(
| tsingy wrote:
| Anything for juniors?
| edem wrote:
| havent touched clojure in years, but i use FP daily, can i
| get an interview? :)
| refset wrote:
| InstantDB (YC S22) launched a few weeks ago
| https://news.ycombinator.com/item?id=41322281
| packetlost wrote:
| I don't know about startups, but I know of several more mature
| companies that are using it. It's, IMO, the best way to use the
| Java ecosystem.
| fiddlerwoaroof wrote:
| Even if you never push the code to production, it's a crazy
| gorse multiplier for the explore and adventure prototype
| phase of a project
| finnh wrote:
| "gorse multiplier" wins today's "best transcription error"
| award, IMO
|
| category: edit-distance-two
| pavlov wrote:
| I was momentarily convinced that "crazy horse multiplier"
| must be an American idiom, and then realized that maybe
| the misspelled thing being multiplied is a force rather
| than a horse after all.
| fiddlerwoaroof wrote:
| I usually catch these too and ninja edit them out
| jacobobryant wrote:
| 2nd place probably goes to another comment in this
| thread: https://news.ycombinator.com/item?id=41560711
| kaliszad wrote:
| Yes, in fact there is also a good number of conferences, for
| instance in less than two days https://2024.heartofclojure.eu/
| starts in Belgium for instance (meet me there ;-) ).
|
| We are writing a trading system for a small broker company in
| Clojure/ ClojureScript with a Datomic centered backend. The
| previous company some of us on the team worked at had the code-
| base also in Clojure/ ClojureScript.
| tsingy wrote:
| How is the job market for juniors? Functional programming
| jobs seems to be anti-juniors when hiring.
| kaliszad wrote:
| Hard to say, I was always contacted directly by the team/
| had other role and later it turned out I can do a fair bit
| of programming too ;-)
| nextos wrote:
| Sadly Common Lisp, Scheme, Clojure, Julia, OCaml, F# and
| Haskell jobs are quite scarce.
|
| For example, right now, I can only see ~50 LinkedIn EU
| Clojure ads. A dozen more mention Clojure but it does not
| seem to be the main focus of the job.
|
| Would love to be proven wrong, though. Perhaps these jobs
| are sometimes not advertised via LinkedIn.
| lvh wrote:
| (I'm one of the founders of Latacora and reviewed the post.)
| If any of you are at Heart of Clojure, I'll be there both
| wearing my Latacora hat and my Clojurists Together hat :)
| tvaughan wrote:
| Nalca Biotech
| thenonameguy wrote:
| Yup, it's still the best tool for me. Especially for complex
| domains, as it does not allow you to over-abstract data
| structures.
|
| Schemamap.io has a declarative SQL compiler and backend
| implemented in it, solving Postgres database syncing.
| jwr wrote:
| Definitely. It's a great tool, especially in a small and smart
| team.
| vincentdm wrote:
| We (https://basil.net) are not new and not a startup, but our
| main language is Clojure and each new project is written in it.
| Very satisfied with our choice.
| puredanger wrote:
| The annual Clojure/conj conference is coming up next month in
| Alexandria, VA (https://2024.clojure-conj.org) and there will
| be talks from a variety of companies, both big and small.
| w10-1 wrote:
| Their content-addressing hash would seem critical, but the
| "combineUnordered" hash they use just adds each byte. The API is
| clear that this is only as good as possible, and I'm not sure I
| would rely on it for data used for security investigations. I
| suspect they'll come up with something like an arbitrary but
| fixed order over keys that would improve hash quality.
|
| More generally, while I can maybe understand what they're doing,
| it's hard to imagine how to QA it in a way that's convincing to
| customers without a lot of data/compute/coverage analysis.
| lvh wrote:
| Re: hashing: Yes, but I'll leave that one to Paul who is a lot
| smarter than I am :)
|
| Re: QA: can you say a bit more about the type of coverage
| you're worried about? Is your concern that we'd be missing
| APIs, or that the storage format itself breaks, resulting in
| fact elision? payne (the underlying project) has a borderline
| obnoxious amount of tests, but that doesn't mean we didn't miss
| anything :)
| paulvrutledge wrote:
| I suspect you're right and was already having similar thoughts
| regarding the hashing scheme. I put a patch together and am
| going to supplement with some additional tests of the collision
| space.
|
| Unordered hashes made more sense for arbitrary Clojure data
| structures where the keys might be complex compound objects,
| but once we're in the land of datoms with finite value data
| types it's pretty easy to enforce a consistent ordering.
|
| (disclaimer: I wrote much of the feature and post)
| juoitre wrote:
| > in a way that's convincing to customers
|
| Customers of this sort of security consulting are largely
| uninterested in the security as much as the audit report that
| allows them to say to their customers and incestors "we had
| these security professionals look at our stuff and this is what
| they said".
| lvh wrote:
| Some of our customers, like Tailscale, are a helluva lot more
| picky than that.
| lvh wrote:
| FYI: we're planning a followup post for people who are less
| interested in the Datomic mechanics and more interested in the
| usefulness to investigations and other security functions.
| Informally, I think of it this way: your SIEM has the deltas, but
| often you want the contextual states in between the deltas (and a
| lot of investigation is about trying to reason about that state).
| We built this tool originally to support that, and it turned out
| that approach was also super useful for things like compliance,
| CSPM...
|
| We already wrote a high level blog post here:
| https://www.latacora.com/blog/2023/11/01/our-approach-to-bui...
| -- but the one I'm hoping to write is more of a case study.
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