Open e0d opened 2 years ago
Worth noting that this work cannot be fully completed until Old Mongo support is removed (DEPR-58).
Posted this on the forums:
To give a little more context, there are a few independent pieces of deprecation that need to happen before MongoDB can be removed:
Remove Old Mongo support entirely. @mikix done great work recently in cutting off access to Old Mongo courses:
What remains is a lot of code deletion and test fixing. This is an area where people can contribute with relatively little ramp-up, since it's mostly deleting test permutations. Please comment here if you're interested in that work.
This will require three parallelizable streams of work:
Once the two sections above this are finished, it's possible to have a basic install of Open edX without MongoDB. The last piece that I know of that actively uses MongoDB is the forums experience. I don't know what the current plans for deprecation of this usage is. The last I recall talking with anyone about it, the general idea was that we wanted to switch away from MongoDB and towards the Django ORM, but only after removing the Ruby code. But again, I'm not sure where that stands now.
At the very least, if the other sections are completed, MongoDB can be a dependency of only the forums, and not Open edX as a whole.
Can I ask what is the status of this issue? If I understand correctly, step 2 "Convert the Split Modulestore to use django-storages" is not yet completed, right?
TLDR;
Mongo DB introduces excessive hosting and maintenance cost for the value that we derive from in on the platform. With improvements to serializing courses in the RDBMS, it's even less valuable. Removing it will let us reduce cost and maintenance burden, scale down better, and thereby scale platform adoption.
The full details of this are here.
Related PRs: