Transcript for the sharding example from a mongo workshop

mongo-sharding-transcript.js

mkdir -p data/shard0/rs0 data/shard0/rs1 data/shard0/rs2
mongod --replSet s0 --logpath "s0-r0.log" --dbpath data/shard0/rs0 --port 37017 --fork --shardsvr
mongod --replSet s0 --logpath "s0-r1.log" --dbpath data/shard0/rs1 --port 37018 --fork --shardsvr
mongod --replSet s0 --logpath "s0-r2.log" --dbpath data/shard0/rs2 --port 37019 --fork --shardsvr
 
mongo --port 37017
config = {_id: "s0", members: [
  {_id: 0, host: "localhost:37017" },
  {_id: 1, host: "localhost:37018" },
  {_id: 2, host: "localhost:37019" }]};
rs.initiate(config);
^D
  
mkdir -p data/shard1/rs0 data/shard1/rs1 data/shard1/rs2
mongod --replSet s1 --logpath "s1-r0.log" --dbpath data/shard1/rs0 --port 47017 --fork --shardsvr
mongod --replSet s1 --logpath "s1-r1.log" --dbpath data/shard1/rs1 --port 47018 --fork --shardsvr
mongod --replSet s1 --logpath "s1-r2.log" --dbpath data/shard1/rs2 --port 47019 --fork --shardsvr
 
mongo --port 47017
config = {_id: "s1", members: [
  {_id: 0, host: "localhost:47017" },
  {_id: 1, host: "localhost:47018" },
  {_id: 2, host: "localhost:47019" }]};
rs.initiate(config);
^D
  
mkdir -p data/config/config-a data/config/config-b data/config/config-c
mongod --logpath "cfg-a.log" --dbpath data/config/config-a --port 57017 --fork --configsvr
mongod --logpath "cfg-b.log" --dbpath data/config/config-b --port 57018 --fork --configsvr
mongod --logpath "cfg-c.log" --dbpath data/config/config-c --port 57019 --fork --configsvr
 
mongos --logpath "mongos-1.log" --configdb localhost:57017,localhost:57018,localhost:57019  --fork
 
mongo
db.adminCommand( {addshard: "s0/localhost:37017"} );
db.adminCommand( {addshard: "s1/localhost:47017"} );
db.adminCommand( {enableSharding: "media"} );
db.adminCommand( {shardCollection: "media.photos", key: {user: 1}} );
 
show dbs
use media
db.photos.insert({user:'Alice', caption:'skiing', ts:1227389123744});
db.photos.insert({user:'Bob', caption:'skiing', ts:1227388883749});
db.photos.insert({user:'Carla', caption:'party', ts:1327388883749});
for (i = 0; i < 1000; i++) {   
    db.photos.insert({user:Math.random().toString(36).substr(2,16), caption:'x'}); 
}
sh.help()
sh.status()
db.photos.find({caption:'scuba'}).explain()
db.photos.find({user:'vladimir'}).explain()
db.photos.stats()