一般分片

# test_shard01 test_shard02 为2个分片（1主1从1仲裁）
# 登录对应分片集群的mongos
#  /path/to/bin/mongo  --host xx.xx.xx  --port  XXX  -u "username"  -p "XXX"   --authenticationDatabase admin


use admin
sh.addShard("test_shard01/172.18.65.101:20002,172.18.65.102:20002");
sh.addShard("test_shard02/172.18.65.103:20003,172.18.65.104:20003");

sh.enableSharding("testDB");
admindb = db.getSisterDB('admin');
admindb.runCommand({shardcollection : "testDB.T1",key:{_id: 1}});
admindb.runCommand({shardcollection : "testDB.T2",key:{groupId: 1}});

文件分片

# file_shard01 file_shard02 为2个分片（1主1从1仲裁）

# fs.files         元数据
# fs.chunks        实体数据

# 登录对应分片集群的mongos
# /path/to/bin/mongo  --host xx.xx.xx   --port XXX   -u "username"   -p "XXX"   --authenticationDatabase admin

use admin
sh.addShard("file_shard01/172.18.65.105:30002,172.18.65.106:30002");
sh.addShard("file_shard02/172.18.65.107:30003,172.18.65.108:30003");


sh.enableSharding("fileDB");

filedb=db.getSisterDB("fileDB");
filedb.fs.chunks.ensureIndex({files_id:1, n:1}, {unique: true})

admindb=db.getSisterDB('admin');
admindb.runCommand({shardcollection : "fileDB.fs.chunks",key:{files_id: 1}});

参考

Mongo分片之选择片键
http://t.zoukankan.com/lizexiong-p-15386985.html

mongoDB Sharding GridFS
https://www.mongodb.com/docs/manual/core/gridfs/

如何在MongoDB中轻松使用GridFS？
https://mp.weixin.qq.com/s/z7ke5OCBnNzutCMwW_hOuA
https://mp.weixin.qq.com/s/6moozgPJfdZcKOOE37IFeg
https://mp.weixin.qq.com/s/kYLcc175hux5VRgy524UBg
https://mp.weixin.qq.com/s/2qvZBg1wedhlOLrPvo4-ZQ