1 # mkdir -p /home/m17 //home/m18 /home/m20 /home/mlog
2 
3 ./bin/mongod --dbpath /home/m17 --logpath /home/mlog/m17.log --fork --port 27017 --smallfiles 
4 ./bin/mongod --dbpath /home/m18 --logpath /home/mlog/m18.log --fork --port 27018 --smallfiles

# ./bin/mongod --dbpath /home/m20 --logpath /home/mlog/m20.log --fork --port 27020 --configsvr 

1 # ./bin/mongos --logpath /home/mlog/m30.log --port 30000 --configdb 127.0.0.1:27020 --fork

1 # ./bin/mongo --port 30000
2 MongoDB shell version: 2.4.9
3 connecting to: 127.0.0.1:30000/test

 1 mongos> sh.addShard(‘127.0.0.1:27018‘)
 2 { "shardAdded" : "shard0000", "ok" : 1 }
 3 mongos> sh.addShard(‘127.0.0.1:27017‘)
 4 { "shardAdded" : "shard0001", "ok" : 1 }
 5 mongos> sh.enableSharding(‘shop‘);
 6 { "ok" : 1 }
 7 
 8 mongos> sh.status();
 9 --- Sharding Status --- 
10   sharding version: {
11         "_id" : 1,
12         "version" : 3,
13         "minCompatibleVersion" : 3,
14         "currentVersion" : 4,
15         "clusterId" : ObjectId("5746614b92e27268fdc306b4")
16 }
17   shards:
18         {  "_id" : "shard0000",  "host" : "127.0.0.1:27018" }
19         {  "_id" : "shard0001",  "host" : "127.0.0.1:27017" }
20   databases:
21         {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }
22         {  "_id" : "test",  "partitioned" : false,  "primary" : "shard0001" }
23         {  "_id" : "shop",  "partitioned" : true,  "primary" : "shard0000" }   

 1 mongos> sh.shardCollection(‘shop.goods‘,{goods_id:1});
 2 { "collectionsharded" : "shop.goods", "ok" : 1 }
 3 mongos> sh.status();
 4 --- Sharding Status --- 
 5   sharding version: {
 6         "_id" : 1,
 7         "version" : 3,
 8         "minCompatibleVersion" : 3,
 9         "currentVersion" : 4,
10         "clusterId" : ObjectId("5746614b92e27268fdc306b4")
11 }
12   shards:
13         {  "_id" : "shard0000",  "host" : "127.0.0.1:27018" }
14         {  "_id" : "shard0001",  "host" : "127.0.0.1:27017" }
15   databases:
16         {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }
17         {  "_id" : "test",  "partitioned" : false,  "primary" : "shard0001" }
18         {  "_id" : "shop",  "partitioned" : true,  "primary" : "shard0000" }
19                 shop.goods
20                         shard key: { "goods_id" : 1 }
21                         chunks:
22                                 shard0000       1
23                         { "goods_id" : { "$minKey" : 1 } } -->> { "goods_id" : { "$maxKey" : 1 } } on : shard0000 Timestamp(1, 0) 
24 
25 修改分片大小
26 mongos> use config
27 switched to db config
28 mongos> db.settings.find();
29 { "_id" : "chunksize", "value" : 64 }
30 mongos> db.settings.save({_id:‘chunksize‘,"value":1}); 

1 mongos>sh.shardCollection(‘shop.user‘,{userid:1}); 

1 mongos> for(var i=1;i<=40;i++) { sh.splitAt(‘shop.user‘,{userid:i*1000}) } .

 1 mongos> sh.status();
 2 --- Sharding Status --- 
 3 sharding version: {
 4 "_id" : 1,
 5 "version" : 3,
 6 "minCompatibleVersion" : 3,
 7 "currentVersion" : 4,
 8 "clusterId" : ObjectId("5746614b92e27268fdc306b4")
 9 }
10 shards:
11 { "_id" : "shard0000", "host" : "127.0.0.1:27018" }
12 { "_id" : "shard0001", "host" : "127.0.0.1:27017" }
13 databases:
14 { "_id" : "admin", "partitioned" : false, "primary" : "config" }
15 { "_id" : "test", "partitioned" : false, "primary" : "shard0001" }
16 { "_id" : "shop", "partitioned" : true, "primary" : "shard0000" }
17 shop.goods
18 shard key: { "goods_id" : 1 }
19 chunks:
20 shard0000 1
21 { "goods_id" : { "$minKey" : 1 } } -->> { "goods_id" : { "$maxKey" : 1 } } on : shard0000 Timestamp(1, 0) 
22 shop.user
23 shard key: { "userid" : 1 }
24 chunks:
25 shard0001 20              --  实例1 20个分片
26 shard0000 20              --  实例2 20个分片
27 too many chunks to print, use verbose if you want to force print

1 for(var i=1;i<=40000;i++) {db.user.insert({userid:i,username:‘hello world ‘+i});}; 

1 --节点1
2 > db.user.count();
3 19999 
4 
5 --节点2
6 > db.user.count();
7 20001