gistfile1.txt

mongos> db.locks.find( { _id : "balancer" } ).pretty()
{
	"_id" : "balancer",
	"state" : 0,
	"who" : "ip-172-31-28-205:27018:1461037929:1804289383:Balancer:846930886",
	"ts" : ObjectId("5716450a5895fd10a3e9905e"),
	"process" : "ip-172-31-28-205:27018:1461037929:1804289383",
	"when" : ISODate("2016-04-19T14:47:38.286Z"),
	"why" : "doing balance round"
}
mongos> sh.setBalancerState( true )
mongos> db.settings.update(    { _id: "balancer" },    { $set: { activeWindow : { start : "00:00", stop: "23:59" }}}, { upsert: true } )
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 0 })
mongos> db.locks.find( { _id : "balancer" } ).pretty()
{
	"_id" : "balancer",
	"state" : 0,
	"who" : "ip-172-31-28-205:27018:1461037929:1804289383:Balancer:846930886",
	"ts" : ObjectId("5716451d5895fd10a3e99060"),
	"process" : "ip-172-31-28-205:27018:1461037929:1804289383",
	"when" : ISODate("2016-04-19T14:47:57.259Z"),
	"why" : "doing balance round"
}