It's not possible to lock a mongodb document. What if I need to?

Question

I know that I can\'t lock a single mongodb document, in fact there is no way to lock a collection either.

However, I\'ve got this scenario, where I think I need some

Answer 1

"Doctor, it hurts when I do this"

"Then don't do that!"

Basically, what you're describing sounds like you've got a serial dependency there -- MongoDB or whatever, your algorithm has a point at which the operation has to be serialized. That will be an inherent bottleneck, and if you absolutely must do it, you'll have to arrange some kind of semaphore to protect it.

So, the place to look is at your algorithm. Can you eliminate that? Could you, for example, handle it with some kind of conflict resolution, like "get record into local' update; store record" so that after the store the new record would be the one gotten on that key?