How to ensure data consistency between redis and mysql

Redis and MySQL data consistency guarantee

In order to ensure data consistency between Redis and MySQL, the following strategies can be adopted:

1. Master-slave replication

• #Set MySQL as the master database and Redis as the slave database.
• Use MySQL's replication function to synchronize updates to Redis.
• Use the Pub/Sub mechanism of Redis to notify subscribers of updates.

2. Transaction Queue

• Create a transaction queue and send update requests to the queue.
• Queue consumers get update requests from the queue and apply them to MySQL and Redis.
• Ensure updates are applied in the same order to maintain data consistency.

3. API Gateway

• Create an API gateway between MySQL and Redis.
• All update requests to the database must be made through the API Gateway.
• The API Gateway is responsible for coordinating updates and ensuring they are applied in the correct manner.

4. Regular synchronization

• Regularly use scripts or tools to synchronize data in MySQL to Redis.
• This ensures that the data in Redis remains consistent with MySQL over time.

5. Compromise

• In some scenarios, perfect real-time consistency may not be achieved.
• In this case, an acceptable consistency level, such as eventual consistency, can be chosen based on the specific needs of the application.

Choose the appropriate method

Which mechanism you choose depends on the specific requirements and performance goals of your application. Here are some factors to consider:

• Data consistency requirements
• Performance requirements
• Application complexity
• Available resources

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