gistfile1.txt

mongos> sh.status()
--- Sharding Status --- 
  sharding version: {
	"_id" : 1,
	"version" : 4,
	"minCompatibleVersion" : 4,
	"currentVersion" : 5,
	"clusterId" : ObjectId("54d13c0555c0347d23e33cdd")
}
  shards:
	{  "_id" : "shard01",  "host" : "shard01/hingo-sputnik:27018,hingo-sputnik:27019,hingo-sputnik:27020" }
	{  "_id" : "shard02",  "host" : "shard02/hingo-sputnik:27021,hingo-sputnik:27022,hingo-sputnik:27023" }
  databases:
	{  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }
	{  "_id" : "test",  "partitioned" : true,  "primary" : "shard01" }
		test.mycollection
			shard key: { "_id" : 1 }
			chunks:
				shard01	1
			{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : shard01 Timestamp(1, 0) 

mongos> sh.splitAt( "test.mycollection", { _id : 6 } )
{ "ok" : 1 }

mongos> sh.status()
--- Sharding Status --- 
  sharding version: {
	"_id" : 1,
	"version" : 4,
	"minCompatibleVersion" : 4,
	"currentVersion" : 5,
	"clusterId" : ObjectId("54d13c0555c0347d23e33cdd")
}
  shards:
	{  "_id" : "shard01",  "host" : "shard01/hingo-sputnik:27018,hingo-sputnik:27019,hingo-sputnik:27020" }
	{  "_id" : "shard02",  "host" : "shard02/hingo-sputnik:27021,hingo-sputnik:27022,hingo-sputnik:27023" }
  databases:
	{  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }
	{  "_id" : "test",  "partitioned" : true,  "primary" : "shard01" }
		test.mycollection
			shard key: { "_id" : 1 }
			chunks:
				shard02	1
				shard01	1
			{ "_id" : { "$minKey" : 1 } } -->> { "_id" : 6 } on : shard02 Timestamp(2, 0) 
			{ "_id" : 6 } -->> { "_id" : { "$maxKey" : 1 } } on : shard01 Timestamp(2, 1) 

mongos>