Use of redis

redis It's a non relational database .

Reasons for fast speed ,

Single thread ,

Memory io

multiple io Fast access of complex hash structure

data type 5 Kind of ,set zset list hash string

redis Simplest use .

For example, and mysql Continuous use .

Query data ,

The first check passed redis No

adopt mysql I'll give you the data you find redis Add one key value

Second check , Yes. , Go directly redis

Delete data

Delete mysql And delete redis

Modifying data

modify mysql And modify redis

Add data

To reset redis.

Use redis It's mainly about getting data quickly , Meet multiple concurrency .

As for how to set up list, You can leave a message , Then reply .

redis download , Follow the steps .

redis adopt pom.xml File configuration .

This is it. redis.

I won't set the expiration time .

Memory avalanche

5000 Data I 4000 Access database , Memory failure .

Memory penetration

Keep performing the same visit , Access through the database , Database crash .