Mongodb enable oplog not working

Question

I have a standalone instance of mongodb (on windows) and want to enable oplog without replicaset.

I found this SO post and set the --master option in my windows service path. But oplog is not created. Any advice?

D:\\MongoDB\\2.6.5\\bin\\mongod.exe --dbpath=D:\\MongoDB\\2.6.5\\data\\db\\ --logpath=D:\\MongoDB\\2.6.5\\log\\mongo.log --service --master

oplog enable on standalone mongod not for replicaset

Answer 1

Besides starting it with --master and --logpath you also need to enable it manually by executing the following in mongo shell:

use local

rs.initiate( { _id : 'q', version : 1, members : [ {_id : 0, host : '127.0.0.1'} ] } )