What are disk caching eviction policies?

What are disk caching eviction policies?

Disk caching eviction policies determine how data is removed from the cache when it becomes full. Common policies include LRU (Least Recently Used), FIFO (First In, First Out), and LFU (Least Frequently Used).

Can you explain how LRU works?

Sure! LRU keeps track of the order in which items are accessed. When the cache is full, it removes the least recently used item to make space for new data.

What are the advantages of using LFU?

LFU prioritizes frequently accessed data, which can improve cache hit rates for popular items. However, it may not adapt well to changing access patterns.

Are there any drawbacks to FIFO?

Yes, FIFO can lead to suboptimal cache performance because it doesn't consider how often or recently data is accessed, potentially evicting useful data.

How do I choose the right eviction policy for my application?

Choosing the right policy depends on your application's access patterns. Analyze your data usage to determine which policy aligns best with your needs.