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by dccoolgai
3600 days ago
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I would say the latter and the former are inexorably intertwined; i.e. Mongo causes problems for companies because it does things you would not expect a database to do, like your example of phantom indexes...and pretty much all bets being off when you try to leverage sharding... the one thing it was supposed to be able to do to scale... |
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We had more problems with sharding over the years than you could imagine...the distributed locking mechanism didn't work a lot of the time, the balancer didn't work, weird consistency issues between the config servers, configuration that didn't get replicated across all shards, stupid shard key selection (admittedly our fault but there really should be better guidance on this topic), etc.