Compare write-back vs write-through caches
Overview
This question evaluates understanding of caching policies and memory/storage hierarchy trade-offs, focusing on how write-back and write-through handle writes, coherence, durability, latency, bandwidth, dirty bits, write amplification, and power-loss risks.
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Aug 7, 2025, 12:00 AM
Software Engineer
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Coding & Algorithms
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Compare write-back and write-through caching policies. Explain how each handles writes, coherence, durability, latency, and bandwidth; discuss typical use in CPU caches vs storage systems and the trade-offs (e.g., dirty bits, write amplification, and risk on power loss).