Last week, the .NET Team announced the release of HybridCache, a new .NET 9 library, now available through Microsoft.Extensions.Caching.Hybrid package. According to the source, the library is designed to enhance data storage and retrieval performance by combining both in-memory and distributed caches, such as Redis. This approach aims to ensure optimal performance and security for applications, regardless of their scale or complexity.
As explained, HybridCache simplifies common development tasks by reducing the need for boilerplate code, such as object serialization, cache-aside pattern implementation, and data consistency management. By integrating both in-memory and distributed cache stores, HybridCache is stated to improve application speed and responsiveness. It is particularly recommended for developers working with ASP.NET Core applications that involve complex data queries, operate within microservice architectures, or require real-time data processing.
The key features of HybridCache, include its compatibility with existing cache backends like Redis, SQL Server, CosmosDB, and Garnet. Additionally, the library offers a simple API, cache-stampede protection, and cache invalidation using tags. It also provides support for newer caching APIs, such as IBufferDistributedCache. Furthermore, HybridCache allows for flexible serialization options, including JSON and Protobuf, while ensuring secure data handling and authentication by default.
As reported, one of the notable features of HybridCache is its so-called cache-stampede protection. A cache stampede occurs when multiple clients simultaneously request the same data after it has expired from the cache. This often leads to redundant computations and database queries, which can slow down web applications.
According to the source, HybridCache addresses this issue by ensuring that when multiple requests for the same data arrive, only one computation is performed. The result is then returned to all queued requests, reducing unnecessary load and maintaining data consistency.
Additionally, HybridCache enables cache invalidation using tags, which are string values that categorize cache data. This feature simplifies managing and deleting cache items in bulk. Instead of deleting individual cache entries, developers can now delete all items with a specific tag or a set of tags with a single API call. Based on the documentation, this approach improves efficiency, particularly when handling large volumes of cached data.
It is important to note, that when cache entries are invalidated by key or tag, they are removed from both the current server and its secondary out-of-process storage. However, the in-memory cache on other servers remains unaffected.
HybridCache is compatible with older .NET runtimes, including .NET Framework 4.7.2 and .NET Standard 2.0, making it accessible to a wide range of developers.
Regarding the extensibility, the library includes a concrete implementation of the HybridCache abstract class, which is provided through dependency injection. Developers are also free to create custom implementations of the API for specific use cases.
Microsoft provides detailed documentation for interested readers to explore more about HybridCache features.
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