[redis] key hierarchy

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Key Hierarchical structure

reflection

Redis There's nothing like MySQL Medium table Concept , How can we distinguish between different types of key Well ？

• for example ： Need to store users 、 Product information to redis in , There's a user id yes 1, There is a commodity id It happens to be 1.

Redis Of key Multiple words are allowed to form a hierarchy , Use... Between multiple words ： separate , The format is as follows ： Project name ： Business name ： type ：id, This format is not fixed , You can delete or add entries according to your own needs .

• user dependent key -> zyx：user：1
• product dependent key -> zyx：product：1

If value It's a java object , For example, one User object , You can serialize the object to JSON Store after string ：

Using the above ideas, we are Redis Store two... In User Object data and two Product Object data ：

127.0.0.1:6379[2]> SET zyx:user:1 '{"id":1, "name":"Jack", "age": 21}'
OK
127.0.0.1:6379[2]> SET zyx:user:2 '{"id":1, "name":"Rose", "age": 18}'
OK
127.0.0.1:6379[2]> SET zyx:product:1 '{"id":1, "name":" millet 11", "price": 4999}'
OK
127.0.0.1:6379[2]> SET zyx:product:2 '{"id":2, "name":" glory 6", "price": 2999}'
OK
127.0.0.1:6379[2]> KEYS *
1) "zyx:product:2"
2) "zyx:user:2"
3) "zyx:user:1"
4) "zyx:product:1"

When we open it through the graphical interface, we can clearly find our stored User、Product Object data is classified into files , Implements a hierarchical structure ：

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