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If you can turn that behavior on and off (by using getLastError or whatever), why not have this feature?

If I'm logging upvotes on a post or comments on a blog, which is about as serious as 99% of these b.s. startups are doing, I think it's fair to ignore errors.

I do agree that this should be pointed out in huge blinking letters though, or be a driver flag that is on by default. The amount of people who don't know this about Mongo, but are still using it to store gigs of data, is horrifying.




  If I'm logging upvotes on a post or comments on a blog, 
  [...] I think it's fair to ignore errors.
Even in that situation, you need to know whether you're discarding 1% of upvotes or 99% of upvotes.

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I am reminded of the time, back deep in the past of MySQL, that someone complained about MySQL not providing locks. The development replies amounted to "But it is FAST!" The reply was "But the results are often wrong" and the developers again "But it is FAST!"

Acceptable software, particularly in the class of databases, is obligated to tell you that it didn't complete your request. This is not an option.

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