gistfile1.txt

$ mongo --port 27021
MongoDB shell version: 2.6.7
connecting to: 127.0.0.1:27021/test
shard02:PRIMARY> db.mycollection.find()
{ "_id" : 1, "data" : "hello" }
{ "_id" : 3, "data" : "hello" }
{ "_id" : 5, "data" : "hello" }
shard02:PRIMARY> use local
switched to db local
shard02:PRIMARY> db.oplog.rs.find().pretty()
{
	"ts" : Timestamp(1422998531, 1),
	"h" : NumberLong(0),
	"v" : 2,
	"op" : "n",
	"ns" : "",
	"o" : {
		"msg" : "initiating set"
	}
}
{
	"ts" : Timestamp(1422998890, 1),
	"h" : NumberLong("-6780991630754185199"),
	"v" : 2,
	"op" : "i",
	"ns" : "test.system.indexes",
	"fromMigrate" : true,
	"o" : {
		"v" : 1,
		"key" : {
			"_id" : 1
		},
		"name" : "_id_",
		"ns" : "test.mycollection"
	}
}
{
	"ts" : Timestamp(1422998890, 2),
	"h" : NumberLong("-165956952201849851"),
	"v" : 2,
	"op" : "i",
	"ns" : "test.mycollection",
	"fromMigrate" : true,
	"o" : {
		"_id" : 1,
		"data" : "hello"
	}
}
{
	"ts" : Timestamp(1422998890, 3),
	"h" : NumberLong("-7432242710082771022"),
	"v" : 2,
	"op" : "i",
	"ns" : "test.mycollection",
	"fromMigrate" : true,
	"o" : {
		"_id" : 3,
		"data" : "hello"
	}
}
{
	"ts" : Timestamp(1422998890, 4),
	"h" : NumberLong("6790671206092100026"),
	"v" : 2,
	"op" : "i",
	"ns" : "test.mycollection",
	"fromMigrate" : true,
	"o" : {
		"_id" : 5,
		"data" : "hello"
	}
}