HybridCache: FAST L1 + L2 Cache in NET

Microsoft’s HybridCache is now stable, offering a powerful solution for high-performance caching in .NET applications. It combines the speed of in-memory (L1) caching with the persistence of distributed (L2) caching, making it ideal for scalable applications.

🔗 Reference: HybridCache on LinkedIn

You Should Know:

1. How HybridCache Works

HybridCache merges the benefits of:

• L1 Cache: Lightning-fast in-memory storage (e.g., MemoryCache).
• L2 Cache: Distributed caching (e.g., Redis, SQL Server, or NCache).

2. Basic Implementation

Install the package:

dotnet add package Microsoft.Extensions.Caching.Hybrid 

Configure in `Program.cs`:

builder.Services.AddHybridCache(options => 
{ 
options.DefaultEntryOptions = new HybridCacheEntryOptions 
{ 
LocalCacheExpiration = TimeSpan.FromMinutes(5), 
DistributedCacheExpiration = TimeSpan.FromHours(1) 
}; 
}); 

3. Using HybridCache in Code

private readonly HybridCache _cache;

public MyService(HybridCache cache) 
{ 
_cache = cache; 
}

public async Task<string> GetCachedDataAsync(string key) 
{ 
return await _cache.GetOrCreateAsync(key, async () => 
{ 
// Fetch data if not cached 
return await FetchDataFromSource(); 
}); 
} 

4. Advanced Commands & Configurations

• Forced Eviction:

  await _cache.RemoveAsync(key); 
  

• Cache Invalidation Patterns: Use `CancellationToken` for dynamic invalidation.
• Redis L2 Cache Setup:

  builder.Services.AddStackExchangeRedisCache(options => 
  { 
  options.Configuration = "localhost:6379"; 
  }); 
  

5. Monitoring & Debugging

• Linux Command to Check Redis Cache:

  redis-cli monitor 
  

• Windows Performance Counter for MemoryCache:

  perfmon /sys 
  

What Undercode Say:

HybridCache bridges the gap between volatile and persistent caching, making .NET apps faster and more resilient. For Linux admins, integrating Redis (sudo apt install redis-server) ensures seamless L2 caching. Windows users can leverage `MemoryCache` with PowerShell monitoring (Get-Counter). Always test cache expiry policies (SlidingExpiration, AbsoluteExpiration) for optimal performance.

Expected Output:

A .NET app with HybridCache configured, logging cache hits/misses, and efficiently scaling under load.

🔗 Further Reading:

• Microsoft HybridCache Docs
• Redis CLI Commands

References:

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