Why you should never, ever, ever use MongoDB - joepie91's Ramblings
MongoDB is evil. It... ... loses data (sources: 1, 2) ... in fact, for a long time, ignored errors by default and assumed every single write succeeded no matter what (which on 32-bits systems led to losing all data silently after some 3GB, due to MongoDB limitations) ... is slow, even at its advertised usecases, and claims to the contrary are completely lacking evidence (sources: 3, 4) ... forces
ソーシャルゲームにおけるAWS／MongoDB利用事例
5. Document-oriented • スキーマレス • BSON形式（Binary JSON） > db.users.save( { name : "Alex", age : 20 } ); > db.users.save( { name : "Beth" } ); > db.users.find(); { _id : ObjectId("..."), name : "Alex", age : 20 } { _id : ObjectId("..."), name : "Beth" } > db.items.save( { id : "item01", name : "hoge", price : 1 } ); > db.items.find(); { _id : ObjectId("..."), id : "item01", name : "hoge", price : 1 }
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