Why do data files still exist after Mongodb deletes the database?
1kw pieces of data were inserted circularly. Then the database was deleted in rockmongo. However, there are still a lot of files in the data directory, and they are not small.
After deleting the database, the disk still has preallocated space, so it needs to be executed:
PS: It is not recommended to use the online environment, which may cause excessive load and service interruption.