What is good block size for file cache on Linux?












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The device block size is usually 512 bytes while the filesystem block size is often 4096 bytes. Why are they different? Why are 512B and 4KB good choices for device and filesystem block sizes? What block size would work best for caching disk reads in a userspace library?






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    The device block size is usually 512 bytes while the filesystem block size is often 4096 bytes. Why are they different? Why are 512B and 4KB good choices for device and filesystem block sizes? What block size would work best for caching disk reads in a userspace library?






    filesystems cache block-device






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      The device block size is usually 512 bytes while the filesystem block size is often 4096 bytes. Why are they different? Why are 512B and 4KB good choices for device and filesystem block sizes? What block size would work best for caching disk reads in a userspace library?






      filesystems cache block-device






      share














      The device block size is usually 512 bytes while the filesystem block size is often 4096 bytes. Why are they different? Why are 512B and 4KB good choices for device and filesystem block sizes? What block size would work best for caching disk reads in a userspace library?






      filesystems cache block-device




      filesystems cache block-device





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      asked 8 mins ago









      CykerCyker

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