Deploy a Sharded database for Testing

mongosharded

//start 2 db instances
mongod --port 27010 --dbpath data/s-0
mongod --port 27011 --dbpath data/s-1

//start the config server
mongod --configsvr --dbpath data/configsvr --port 27015

//start the router
mongos --configdb localhost:27015 --port 27017

//add 2 shard
mongo --host localhost --port 27017
sh.addShard("localhost:27010")
sh.addShard("localhost:27011")

sh.enableSharding("sharded_test_db")
sh.shardCollection("sharded_test_db.users", { "zipcode": 1 } )
sh.shardCollection("sharded_test_db.test_collection", { "_id": "hashed" } )


use sharded_test_db

db.users.insert({name:"G", "zipcode": 25030 })
db.users.insert({name:"P", "zipcode": 25030 })
db.users.insert({name:"A", "zipcode": 25030 })
db.users.insert({name:"S", "zipcode": 25030 })

db.users.insert({name:"X", "zipcode": 31230 })
db.users.insert({name:"Y", "zipcode": 31230 })
db.users.insert({name:"Z", "zipcode": 31230 })
db.users.insert({name:"SA", "zipcode": 20030 })


//distribute data between shards using tags
sh.addShardTag("shard0000", "DC1")
sh.addShardTag("shard0001", "DC2")

sh.addTagRange("sharded_test_db.users", { zipcode: 0 }, { zipcode: 29999 }, "DC1")
sh.addTagRange("sharded_test_db.users", { zipcode: 30000 }, { zipcode: 39999 }, "DC2")

//verify data distribution
use config
db.chunks.find({ns: "sharded_test_db.users"}, {shard:1, _id:0}).sort({shard:1})