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Book Open access Sep 2026

User Space Buffer Cache with the Bells and Whistles of a Kernel Page Cache

Modern NVMe SSDs push the I/O bottleneck into software. Kernel-bypass frameworks accelerate direct I/O but leave buffered I/O, the dominant mode in practice, unoptimized. We show that small buffered I/O (32 B–4 KB) incurs a 2–15 × kernel overhead and dominates real server and mobile workloads. Existing user-space cache...

Riwei Pan, Yu Liang, Sam H. Noh et al. · 0 citations

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