ADL Open Source LRS vs Jupiter

ADL Open Source LRS stores learning data collected through the Experience API, or xAPI. The repository says this version conforms to IEEE 9274.1.1, also known as xAPI 2.0, and describes it as stable but intended for proof-of-concept use with a small number of users. It is free and distributed under the Apache License, Version 2.0.

Docker and Docker Compose are the recommended installation route. The deployment includes a Django web service using uWSGI, an nginx HTTP/HTTPS proxy, PostgreSQL, RabbitMQ, and Redis. OAuth is off by default; the project describes enabling it with the OAUTH_ENABLED setting and registering clients with the LRS. Optional webhooks can filter incoming statements and send matches to a client endpoint, and they are disabled by default. A webhook can include a secret used to send an HMAC hex digest in the X-LRS-Signature header. Celery handles activity metadata retrieval, statement voiding, and LRS hooks asynchronously. Database settings can be changed in settings.ini. The Docker guide describes an included Certbot container for obtaining a certificate for a public domain and restarting nginx to use it.

Jupiter is an open-source Learning Record Store (LRS) for collecting learning activity data using the xAPI and Caliper specifications. Its repository ingests Experience API and Caliper API payloads, and the maker describes it as scalable and fault tolerant. Jupiter includes Metis, an open-source interface for constructing queries and reviewing metrics. Metis presents results as tables or visualizations, exports them in multiple formats, and monitors cluster health with notices about network or hardware failures. The software can be self-hosted. Transcordia also offers Jove, a hosted LRS built on Amazon Web Services and powered by Jupiter; the maker says it can handle tens of thousands of learning events per second. Jove costs nothing for up to 1 million events per year. Above that allowance, the listed price is $1 a month for each 10,000 events per month. The repository identifies an MIT license, and the maker welcomes coding contributions and pull requests. Its stated audience includes educational institutions and research organizations.