datomic 2018-09-27 | Slack Archive

Petrus Theron10:09:13

Is Datomic a good choice for IoT time series sensor readings? Esp. for intermittent connectivity, where a sensor might only connect once a day.

Mark Addleman17:09:39

We use Datomic for time series monitoring data from software environments. We are pretty pleased with the result. We store 300k+ metric streams of data every 30 minutes.

Mark Addleman17:09:06

We encode each 30 minute metric timeslice as a b64 compressed string.

Mark Addleman17:09:01

I’m familiar with infrequent metric streams (like you describe) and I can’t see why that would be a problem. Does the sensor report a series of data points or a single point when it connect?

stijn13:09:41

we are migrating from client to ions, but in the meantime we need to let our code run on elastic beanstalk for a while to give clients the opportunity to move to api gateway (we can't keep url's the same). Now, we have a codebuild project setup for the elastic beanstalk that creates a docker container, but I'm wondering what are the exact credential requirements for being able to download the ion jar from s3?

stijn13:09:29

can we fix this with iam instance profiles on the build server?

stijn14:09:36

Hmmm, nevermind, I should remove that dependency from the deps.edn profile that tries to create the beanstalk build

donaldball18:09:52

I probably need to handle this a layer up in my app stack, but: there’s no effective way to put a datomic connection into read-only mode, is there?

2018-09-27

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