HSE: Heterogeneous-memory storage engine designed for SSDs
> <a href="https://github.com/hse-project/hse" rel="nofollow">https://github.com/hse-project/hse</a><p>Their benchmarks show significant gains compared to RocksDB.<p>> <a href="https://github.com/spdk/rocksdb" rel="nofollow">https://github.com/spdk/rocksdb</a><p>But what I'd really like to see is a comparison against RocksDB using SPDK<p>> <a href="https://dqtibwqq6s6ux.cloudfront.net/download/papers/Hitachi_SPDK_NVMe_oF_Performance_Report.pdf" rel="nofollow">https://dqtibwqq6s6ux.cloudfront.net/download/papers/Hitachi...</a> 
Based on these results, SPDK performs significantly better than the kernel requiring only 1-2 cores to saturate IOPS on an NVMe SSD (compared to the kernel requiring 16)