拥抱NoSQL何时不使用Redis（什么时候不用redis）

Redis is one of the most popular NoSQL databases. It is used in various web applications and has a number of advantages. However, there are some situations where Redis is not the best choice.

First, Redis is not suitable for projects which require high consistency. It is an in-memory database, and because of its high performance, Redis sacrifices some consistency guarantees to improve performance. This is especially true in a distributed system, as consistency is even more important.

Second, Redis is not ideal for certn types of data. For example, it is not suitable for storing large amounts of data, as the memory usage can become very high. For large datasets, it is better to use a more traditional database.

Third, Redis does not have many built-in security features. It lacks features such as authentication, authorization and encryption. In order to ensure data security, developers must implement their own security measures, or use third-party software.

Fourth, Redis is not the best choice for jobs which require large computations. It is designed to store and access data quickly and easily, not to process it. So if the job requires complex computations, it is better to use a more suitable technology, such as Hadoop.

Finally, although Redis is an excellent database for certn types of tasks, it is not always the best choice. If the project requires a more complex database with more features, it is better to use a different database, such as MongoDB.

Overall, Redis is an excellent NoSQL database for certn projects. However, developers must recognize its limitations and use other databases when appropriate. The best way to make this decision is to evaluate the project requirements and determine which database is the best fit.