How to update a mongoDB collection having around 5 million documents in the collection? Which is the fastest way to update these documents?
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On using
updateMulti(), it will update all the matching documents in one transaction. It is more efficient than updating the files one by one, as it decreases the network round-trips across the DB and the application .For updating a large number of documents (5 million), I suggest you making use of
bulk operationsrather thanupdateMulti(). It allows you to do many write operations in groups; lowering the extra work of individual update instructions.