yaml format

arbiter.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/arbiter.log"
  logAppend: true
storage:
 journal:
   enabled: false
 smallFiles: true
 dbPath: "/data/arb"
processManagement:
 fork: true
net:
 port: 30000
replication:
 oplogSizeMB: 10
 replSetName: rs

mongoc.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/mongoc.log"
  logAppend: true
storage:
 journal:
   enabled: true
 smallFiles: true
 dbPath: "/data/configdb"
processManagement:
 fork: true
 pidFilePath: "/opt/mongodb/mongoc.pid"
net:
 port: 27019

mongod-s1.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/mongod-s1.log"
  logAppend: true
storage:
 journal:
   enabled: true
 smallFiles: true
 dbPath: "/data/s1"
processManagement:
 fork: true
 pidFilePath: "/opt/mongodb/mongod-s1.pid"
net:
 port: 27017

mongod-s2.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/mongod-s2.log"
  logAppend: true
storage:
 journal:
   enabled: true
 smallFiles: true
 dbPath: "/data/s2"
processManagement:
 fork: true
 pidFilePath: "/opt/mongodb/mongod-s2.pid"
net:
 port: 27018

mongod-s3.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/mongod-s3.log"
  logAppend: true
storage:
 journal:
   enabled: true
 smallFiles: true
 dbPath: "/data/s3"
processManagement:
 fork: true
 pidFilePath: "/opt/mongodb/mongod-s3.pid"
net:
 port: 27019

mongod.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/mongod.log"
  logAppend: true
storage:
 journal:
   enabled: true
 smallFiles: true
 dbPath: "/data/db"
processManagement:
 fork: true
 pidFilePath: "/opt/mongodb/mongod.pid"
net:
 port: 27017
replication:
 oplogSizeMB: 10
 replSetName: rs

mongos.conf

systemLog:
  destination: file
  path: "/var/log/mongodb/mongos.log"
  logAppend: true
processManagement:
 fork: true
 pidFilePath: "/opt/mongodb/mongos.pid"
sharding:
 configDB: ""
 chunkSize: 1

test-data.txt

use test;
var bulk = db.test_collection.initializeUnorderedBulkOp();
people = ["Marc", "Bill", "George", "Eliot", "Matt", "Trey", "Tracy", "Greg", "Steve", "Kristina", "Katie", "Jeff"];
for(var i=0; i<1000000; i++){
   event_id = 2;
   user_id = i;
   name = people[Math.floor(Math.random()*people.length)];
   number = Math.floor(Math.random()*10001);
   bulk.insert( {"event_id": event_id, "user_id":user_id, "name":name, "number":number });
}
bulk.execute();