What is cache coherence in distributed systems?
Cache coherence refers to the consistency of data stored in local caches of a distributed system, ensuring all caches reflect the same data.
Why is cache coherence important?
It's crucial for maintaining data integrity and consistency across multiple processors, preventing stale data access.
What are some common protocols for achieving cache coherence?
Common protocols include MESI, MOESI, and MSI, which manage how caches communicate and update data.
Can you explain the MESI protocol?
Sure! MESI stands for Modified, Exclusive, Shared, and Invalid. It helps manage cache states to ensure coherence.
What challenges do distributed systems face with cache coherence?
Challenges include increased latency, complexity in protocol design, and the overhead of maintaining consistency.
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