redis as a cache feature has many advantages, which can ease the pressure on the server
first determine whether there is any in the cache. If not, check DB
, then directly use
. What if DB is updated? Isn"t the data in redis just the old dirty data?
immediately update the redis cache data after updating the redis data. You can use message queuing and other methods to update the cache immediately, add a timeout elimination, and set the expiration time for the cache. If there is a problem with the active update, the dirty data will also be expired and deleted.
1. After the new DB, you can directly let the cache expire. The next query will check the database first, and then save it to redis.
2. Use queues to update asynchronously.
1. You can find out how much money you can get for each order first. Note: you can t inquire about it when you place an order. (the current consideration is to slow down the memory when querying, but if this order is checked, the order will not necessa...
what webapp, does is because the business logic is relatively complex, and the server is a stateless service (session, etc., cannot be used to store page data), pages are nested with each other, and it is complex to process data back and forth. Now, in ...
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I can get it from the command line, but I just can t get it in the code. How to solve it? ...
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