How to see oplog in standalone MongoDB -

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i want see oplog have started mongodb suggested in here

mongod --master --port 8888 --dbpath ...

but when run

>db.oplog.rs.find()

it returns nothing

when run 

>db.oplog.rs.stats()

returns error 

{ "ok" : 0, "errmsg" : "ns not found" }

i have tried these commands '>use local'. see same results.i planning read using java oplog watcher api. not able it. missing.how see oplog.

ok isn't replica set when use --master deprecated master-slave replication got me thinking maybe different name:

> show collections oplog.$main startup_log > db.oplog.$main.find() { "ts" : timestamp(1394104629, 1), "op" : "n", "ns" : "", "o" : {  } } { "ts" : timestamp(1394104643, 1), "op" : "n", "ns" : "", "o" : {  } } { "ts" : timestamp(1394104653, 1), "op" : "n", "ns" : "", "o" : {  } } { "ts" : timestamp(1394104663, 1), "op" : "n", "ns" : "", "o" : {  } } { "ts" : timestamp(1394104673, 1), "op" : "n", "ns" : "", "o" : {  } } { "ts" : timestamp(1394104683, 1), "op" : "n", "ns" : "", "o" : {  } } { "ts" : timestamp(1394104693, 1), "op" : "n", "ns" : "", "o" : {  } }

turns out right.


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