I’ll introduce how to check the Storage Engine in MongoDB.
You can check whether the Storage Engine is MMAPv1 or WiredTiger using the db.serverStatus() command.
db.serverStatus().storageEngine
{ "name" : "wiredTiger" }
Don’t worry.
The Storage Engine is only MMAP and cannot be selected, so there’s no way to check it.
That’s all from the Gemba.