I would like to confirm my understanding of the current state of clients and Datomic Cloud: Cloud offers, at present, only the Client API in Clojure, correct? There isn’t a REST API server nor other implementations of the Client API wire protocol to allow for things like JavaScript or Python applications to natively consume Datomic Cloud databases?

@chris_johnson You’re correct. There are feature requests for a JavaScript Client, Python Client, Elixir Client on our suggest a feature page (top right of http://my.datomic.com). You should log in and add your vote to one of those features.

There is also a feature request to support ClojureScript Client lib.

I haven’t done much with Datomic. But the project on at work is ideal for it. It’s already months in and we are nowhere with the current DynamoDB/Serverless set up. I’m currently on front end tasked with Elm. Is there an easy way for me to pass queries to Datomic kind of like GraphQL In nature.

I’ve a fairly dumb question about Datomic pricing. https://www.datomic.com/pricing.html leads me straight to AWS Marketplace calculators which talk about “software and infrastructure” costs… but what about licence fees for Cognitect? I see those mentioned elsewhere, on https://www.datomic.com/get-datomic.html, but that seems to be talking only about the on-prem option.

@jonoflayham the “Software Cost” for Datomic Cloud when you’re on the Marketplace listing is the fee to Cognitect

Thanks, @marshall. So just the $0.012 per hour, roughly? I’ve tried in 3 browsers and on 2 laptops, but I can’t get the software cost or infrastructure cost figures to change no matter what I use for region or fulfilment option.

Sorry; crossed in post. Wow - that seems like great value.

That’s correct. The only difference is in the toplogy. So the Solo topology is $0.012 per hour and the production topology is $0.156 per hour

per instance

None of those figures updates for me when I change topology or region, at the moment. But great to know the ballpark values - thanks.

And - dumber still - you’ll stop being charged when you tear down whatever it is that the CloudFormation templates have built?

The fee to cognitect is only charged when you are running cluster node instances

We don’t charge anything for the other infrastructure (dynamo, s3, etc)

so, yes, when you delete your compute stack you are no longer paying Cognitect

there are some storage resources (s3, dynamo, efs) that are retained when you delete a stack

which you will still pay AWS for unless you explicitly delete them

info here: https://docs.datomic.com/cloud/operation/deleting.html

Understood. I guess much of that is obvious to people used to AWS Marketplace; but if it isn’t, maybe the Cloud-oriented page could drop a few hints.

Am I right in my assumption that I can pass a data structure in JSON, parse that and then send it off in a Datomic pull?

@grounded_sage are you wanting to access Datomic directly from your frontend app or via a webserver?

Web front end would be ideal.

It’s literally an app to keep track of inventory.

If I could query data and update data directly from my web app I would be happy as Larry. There is also an iOS app which is for warehouse workers.

Doesn’t seem to be any way to do it with Cloud.

can I switch between solo and production later on?

without losing data, I mean

@alex438 yep https://docs.datomic.com/cloud/operation/upgrading.html#upgrading-solo-to-production

make sure you’ve done your First Upgrade Ever before doing that ^ https://docs.datomic.com/cloud/operation/upgrading.html#first-upgrade