What do you think about Mongodb as a technology?

[tobleron]

@PragTob

I can’t find the post/presentation where I first saw this highlighted at the moment but this essentially means your change isn’t really there . It sits in RAM. It’s not written to disk or anything yet. If Mongodb crashes right then and there or the server goes out that change is lost although Mongodb has already acknowledged the write as “complete” - which is not what you expect from a database. To the best of my knowledge this was the same even if you distributed Mongodb - i.e. even if the change was written to none of the replicas (not even the primary) it was acknowledged which doesn’t give you a lot of durability.

This somehow reminds of the Optimistic UI used by frameworks like Meteor. The user receives a feedback that his actions are done, but in reality it’s just cached in a minimongo cache on the client side until the server responds with confirmation.

Thanks for your feedback Prag!