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Comment by cheez | Hacker News Reader

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cheez·

And if you aren't convinced, SQLite (and postgres) implemented MongoDB as a feature ;-)

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Which should be used very sparingly, unlike the actual MongoDB, which shouldn't be used at all.

haha.

I use it for application plugin configuration values which allows plugins to do whatever they want but also provides some structure just in case sweeping changes need to be made.

Basically where schemas aren't important or will be defined by someone else.

I’ve heard (way) more than one story about MongoDB mysteriously annihilating all the data. Launched into oblivion.

The worst imaginable outcome for a database.

Oh yeah, I have two of those myself.

jeebus

It's worth mentioning that MongoDB used to have a terrible storage engine--and it would do all sorts of stuff like this under stress.

But it was replaced with a much better engine (WiredTiger) with write-ahead journaling and checkpoints around the year 2016.

In 2020, MongoDB continues to fail consistency tests.

"Jepsen Disputes MongoDB’s Data Consistency Claims" https://www.infoq.com/news/2020/05/Jepsen-MongoDB-4-2-6/

"MongoDB 4.2.6" http://jepsen.io/analyses/mongodb-4.2.6

I've worked at MongoDB for seven years right next to our EMEA/APAC support teams. We've never come across and instance where MongoDB was "mysteriously annihilating all the data". We would take any incidence of that whether it was a paying customer or not very seriously. If you know someone this has happened to I would encourage you to get them contact us.

Joe Drumgoole Director of Developer Relations, MongoDB

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