The atomicity of MongoDB upsert operation concurrency, mongodbupsert

Source: Internet
Author: User

The atomicity of MongoDB upsert operation concurrency, mongodbupsert

When C ++ is used to perform the update operation on MongoDB, if the upsert parameter is set to true, data that does not exist is automatically inserted. In a high concurrency environment, data duplication may occur.

The solution is to add a unique index for the query condition. Refer to the official documentation:

Http://docs.mongodb.org/manual/core/write-operations-atomicity/

Http://docs.mongodb.org/manual/core/index-unique/#index-type-unique


After high-pressure tests, this solution proved to be reliable.





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