sh.removeShardTag("rs1", "US");

sh.removeShardTag("rs2", "EU");

sh.addShardTag("rs1", "US");

sh.addShardTag("rs2", "EU");

sh.disableBalancing("test.sample");

db.sample.drop();

db.createCollection("sample"); 

db.sample.createIndex( { factoryId: 1 } );



sh.enableSharding("test");



sh.shardCollection("test.sample",{ location: 1, factoryId: 1});

sh.addTagRange(
  "test.sample",
  { "location" : "US", "factoryId" : MinKey },
  { "location" : "US", "factoryId" : MaxKey },
  "US"
);

sh.addTagRange(
  "test.sample",
  { "location" : "EU", "factoryId" : MinKey },
  { "location" : "EU", "factoryId" : MaxKey },
  "EU"
);




sh.enableBalancing("test.sample");



for(var i=0; i<100; i++){

    db.sample.insert({

        "location": "US",

        "factoryId": NumberInt(i)

    });

    

    db.sample.insert({

        "location": "EU",

        "factoryId": NumberInt(100+i)

    });

}


sh.startBalancer();

db.sample.find();