Redis-key的設計技巧

1. 把表名轉換為key前綴, 比如:　tag:
2. 第二段放置用於區分key的字段--對應mysql中的主鍵的列名
3. 第三段放置主鍵值
4. 第三段寫列名

用戶表user, 轉換為redis的key-value存儲

userid	username	password	email
9	Lisi	111111	[e-mail]

比如:

127.0.0.1:6379> set user:userid:9:username lisi
OK
127.0.0.1:6379> set user:userid:9:password 111111
OK
127.0.0.1:6379> set user:userid:9:email [e-mail]
OK
127.0.0.1:6379>
127.0.0.1:6379> keys user:userid:9*    #查找有幾個屬性
1) "user:userid:9:password"
2) "user:userid:9:username"
3) "user:userid:9:email"
127.0.0.1:6379> 

---

注意: 實際中經常要通過username來查找信息, 只能通過再建立一個對應關系

127.0.0.1:6379> set user:username:lisi:userid 9    #建立一個username和userid對應的表
OK
127.0.0.1:6379> 
127.0.0.1:6379> get user:username:lisi:userid    #獲取到userid
"9"
127.0.0.1:6379> 
127.0.0.1:6379> keys user:userid:9*    #通過userid找到所有鍵
1) "user:userid:9:password"
2) "user:userid:9:username"
3) "user:userid:9:email"
127.0.0.1:6379> 
127.0.0.1:6379> get user:userid:9:email    #獲取其它鍵的信息
"[e-mail]"
127.0.0.1:6379> 

如果要通過email查詢, 只能再維護

127.0.0.1:6379> set user:email:[e-mail]:userid 9
OK
127.0.0.1:6379> get user:email:[e-mail]:userid
"9"
127.0.0.1:6379> keys user:userid:9*
1) "user:userid:9:username"
2) "user:userid:9:email"
3) "user:userid:9:password"
127.0.0.1:6379>