What are some examples of cache replacement algorithms?

What are some examples of cache replacement algorithms?

Cache replacement algorithms are strategies used to decide which items to remove from the cache when it is full. Some common examples include LRU (Least Recently Used), FIFO (First In, First Out), and LFU (Least Frequently Used). Would you like to know more about how each of these works?

Yes, can you explain how LRU works?

LRU, or Least Recently Used, keeps track of the order in which items are accessed. When the cache is full, it removes the item that hasn't been used for the longest time. This method assumes that items used recently will likely be used again soon.

What about FIFO? How does that differ from LRU?

FIFO, or First In, First Out, removes the oldest item in the cache, regardless of how often it has been accessed. Unlike LRU, it doesn't consider usage patterns, which can sometimes lead to less efficient cache usage.

Can you give an example of LFU?

Sure! LFU, or Least Frequently Used, keeps track of how often items are accessed. When the cache is full, it removes the item that has been used the least number of times. This method is useful for keeping frequently accessed data in the cache.