Optimizations

• Different read and write paths

  • Reads do not place information in the cache
    • Reads use the cache (hits due write)
    • Reads do not modify the cache
  • Writes place information in the cache
    • Writes modify the cache

• Batched writes

  • Write many cache buffers to disk at the same time
    • Write them contiguously

• A page is never split among two buffers

  • Reads perform, at most, one disk access

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