CacheKontinuität

CacheKontinuität refers to the property of a cache that ensures data consistency across multiple cached copies or between the cache and the main memory. In computing, when data is fetched and stored in a cache for faster access, it creates a potential for inconsistency if the original data in main memory is modified without updating the cached version. CacheKontinuität addresses this by implementing mechanisms to maintain coherence.

Different cache coherence protocols exist to manage this consistency. For instance, a write-through policy immediately writes any modified data to both the cache and main memory, ensuring immediate consistency but potentially increasing write latency. Conversely, a write-back policy delays writing to main memory until the cache line is evicted, improving write performance but requiring more complex mechanisms to track modifications and ensure eventual consistency. In multi-processor systems, cache coherence becomes even more critical as multiple processors might cache the same data. Protocols like MESI (Modified, Exclusive, Shared, Invalid) are employed to manage the states of cache lines and ensure that all processors have access to the most up-to-date version of the data. The goal of CacheKontinuität is to prevent stale data from being used, which could lead to incorrect program execution.