Accelerate Ceph by SPDK on AArch64
summary
SPDK is used to drive NVMe from user space on AArch64, replacing the kernel NVMe driver to reduce context-switch and interrupt overhead; microbenchmarks show up to ~300k IOPS and ~1.1 GB/s on raw SPDK tests and ~27x IOPS versus kernel NVMe in fio, while integrated Ceph/BlueStore yields modest cluster gains (≈5% IOPS, ≈10% latency) but shows surprising 90th‑percentile read latency spikes; deployment requires replace kernel NVMe driver, enable hugepages and configure VA bits, and benefits from zero-copy and page-size tuning.
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