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Home Backend Development Golang Analysis of the differences and advantages and disadvantages of memory cache and Redis cache in Golang.

Analysis of the differences and advantages and disadvantages of memory cache and Redis cache in Golang.

Jun 19, 2023 pm 09:28 PM
golang memory cache redis cache

As the scale of applications continues to expand, the demand for data is also increasing. Caching, as an optimized way to read and write data, has become an integral part of modern applications. In terms of cache selection, Golang's built-in memory cache and Redis cache are relatively common choices. This article will compare and analyze the two to help readers make a more appropriate choice.

1. The difference between memory cache and Redis cache

  1. Data persistence

The biggest difference between memory cache and Redis cache is the persistence of data. The data in the memory cache only exists in the memory where the application is running. If the application is unexpectedly closed or restarted, all data will be cleared. The Redis cache is an independent cache server, and the data can be persisted on the disk. Even if the Redis server is restarted, the data will not be lost.

  1. Data structure support

Memory cache usually only supports simple key-value data structures, such as map, slice, etc. The Redis cache supports more complex data structures, such as strings, lists, sets, ordered sets, and hash tables.

  1. Data interaction method

The memory cache reads and writes data directly through the data structure within the application. The Redis cache requires data interaction through the network, and the application needs to communicate with the Redis server through the Redis client library.

2. Analysis of the advantages and disadvantages of memory cache and Redis cache in Golang

  1. Advantages of memory cache

(1) Fast access: due to memory cache It exists directly in the memory of the application, and the data reading and writing speed is very fast, which can meet the application scenarios with high performance requirements.

(2) Data consistency: The memory cache directly uses the data structure within the application to read and write data, so there will be no data exception problems caused by inconsistency between the cache and the database. And since the memory cache does not have data persistence issues, data will not be lost due to cache server failure.

(3) Simple development and maintenance: The built-in memory cache in Golang does not need to rely on third-party components and is very convenient to use. At the same time, because the memory cache does not require special management and maintenance, it also has small maintenance costs.

  1. Disadvantages of memory cache

(1) Space resource occupation: The memory cache exists directly in the memory of the application. If the amount of cached data is too large, this will This causes the application to occupy too many memory resources and affects the overall performance of the application.

(2) Data loss when the application restarts: Since the memory cache data is only stored in the memory, all data will be lost when the application restarts, and the data needs to be read from the database again for caching.

  1. Advantages of Redis cache

(1) Data persistence: Redis cache supports data persistence, and data will not be lost due to Redis server failure or restart.

(2) Support complex data structures: Redis supports complex data structures and can more flexibly meet the needs of applications.

(3) Multiple language support: Redis is an independent cache server that has nothing to do with the language of the application. It supports client libraries in multiple languages ??and is suitable for applications in various languages.

  1. Disadvantages of Redis cache

(1) Network delay: Redis cache requires data interaction through the network. Due to network factors, there will be a certain delay, resulting in read and write Slower speed.

(2) Data consistency: Since the Redis cache and the database are two independent systems, if the application modifies the database but does not update the corresponding data in the Redis cache, data inconsistency will occur. question.

(3) High maintenance costs: Redis is an independent cache server, which requires specialized management and maintenance. It has high requirements on the deployment environment and maintenance personnel, and needs to bear corresponding costs.

3. Conclusion

For applications with small data volume and large memory requirements, memory cache is an efficient caching option. But for applications with large amounts of data that need to share cached data among multiple applications, Redis cache is a better choice. In short, the choice of cache should be reasonably weighed based on actual needs and application scenarios.

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