Refining Compaction Offloading I/O Stack for LSM-Based Key-Value Stores with SPDK

We analyze the compaction I/O characteristics and the resulting I/O time amplification problem in log-structured merge-tree based key-value stores. We also propose an I/O stack refinement using SPDK and NVMe-oF for compaction offloading. Using our proposed I/O stack, preliminary experimental results show a 37.7% improvement in compaction throughput.