#### WARNING: This documenmt needs a run through and a few things left too.  

  # I am going to assume we are not using thetemporary
  # Mongo servers and they are not running. 
  # This will delete them. 

killall mongod
killall mongos
killall mongo
sleep 1

  # If restarting, kill the mogo processes and then do 
rm -rf  mongo/d1 mongo/d2 mongo/d3 mongo/logs
  # Setup 3 directories:
mkdir -p mongo/d1 mongo/d2 mongo/d3 mongo/logs

  # If not AWS,	    ignore or already did it.  
sudo  -s -- bash -c   '  echo "127.0.0.1 localhost ">> /etc/hosts '

  # Start the mongod with shard option. 
mongod --shardsvr --dbpath mongo/d1 --smallfiles --oplogSize 10 --bind_ip 127.0.0.1 --port 4001 > mongo/logs/1.log 2>&1  &

  # Start a mongo config server --- in the Sharding2 document, we will
  # have 3 in a replica set. 
mongod --configsvr --replSet c --dbpath mongo/d3 --smallfiles --oplogSize 10  --bind_ip 127.0.0.1 --port 4003 > mongo/logs/3.log 2>&1  &
  # Stupid but single config server still has to be in a replica set. 
sleep 2
mongo --port 4003 --eval "rs.initiate({ _id: 'c', version: 1, members: [ {_id :0, host: 'localhost:4003' } ] })"

  # Start a mongos -- this connects to the mongod, since the default for a config server is 4003
mongos --configdb "c/127.0.0.1:4003" --bind_ip 127.0.0.1 > mongo/logs/ms_1.log 2>&1  &
sleep 5
  # Start a mongo, which will connect to mongos to execute commands
  # Change the data server to a shard server. 
#mongo --eval 'sh.addShard( "localhost:4001" ,  { name: "s1" })'
mongo --eval 'db.runCommand({addShard: "localhost:4001", name: "s1"})' admin

sleep 2

  # Lets add some data. 
echo "
function fillData() { 
    db = db.getSiblingDB('shard_test')
    for( var i = 0; i < 1000; i++ ) {
        db.no.insert( {value: i } );
    }
}
fillData()
" > mongo/fill.js
mongo mongo/fill.js

  #Shard the database. 
mongo --eval 'sh.enableSharding("shard_test")'
  # Add an index which is required for sharding. 
mongo --eval 'db.no.createIndex( { value : 1}, {unique:1 })' shard_test
  # shard the collection. 
mongo --eval 'sh.shardCollection("shard_test.no", {value: 1}, 1)' 


   #Now add a 2nd shard. 
mongod --shardsvr --dbpath mongo/d2 --smallfiles --oplogSize 10 --bind_ip 127.0.0.1 --port 4002 > mongo/logs/2.log 2>&1  &
sleep 3
#mongo --eval 'sh.addShard( "localhost:4002", { name: "s2" } )'
mongo --eval 'db.runCommand({addShard: "localhost:4002", name: "s2"})' admin

  # Move some chunks over to 2nd server
mongo --quiet --eval 'sh.status()' | egrep '\-\->>|state'
  # Move chunk
mongo --quiet --eval 'sh.moveChunk("shard_test.no", { value: 500 }, "s2")'
mongo --quiet --eval 'sh.status()' | egrep '\-\->>|state'
  # Move it back
mongo --quiet --eval 'sh.moveChunk("shard_test.no", { value: 500 }, "s1")'

  # Now split it so it is uneven. Made a Mistake?
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 100 } )'
  # move the 2nd half to second server. 
mongo --quiet --eval 'sh.status()' | egrep '\-\->>|state'
mongo --quiet --eval 'sh.moveChunk("shard_test.no", { value: 500 }, "s2")'
  # you should see an uneven shard split still at 100
mongo --quiet --eval 'sh.status()' | egrep '\-\->>|state'
 
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 200 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 300 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 400 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 500 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 600 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 700 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 800 } )'
mongo --quiet --eval 'sh.splitAt( "shard_test.no", { "value": 900 } )'

  # Turn on the balancer.
mongo --quiet --eval 'sh.getBalancerHost()'
mongo --quiet --eval 'sh.isBalancerRunning()'
mongo --quiet --eval 'sh.setBalancerState(true)'
mongo --quiet --eval 'sh.isBalancerRunning()'

# sleep for a few seconds
echo "Sleep for 5 seconds to let the balancer do its stuff".
sleep 5
mongo --quiet --eval 'sh.status()' | egrep '\-\->>|state'
mongo --quiet --port 4001 --eval "db.no.count()" shard_test
mongo --quiet --port 4002 --eval "db.no.count()" shard_test