SplitKV: Splitting IO Paths for Different Sized Key-Value Items with Advanced

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" summary

SplitKV is a prototype key-value store that writes small KV to PM then migrates to SSD and directly writes large KV to SSD, using Intel DC persistent memory plus NVMe SSDs and a global in-memory B+ tree index. It picks a 4 KB cutoff (≤4 KB → PM path) and reclaims PM by migrating cold items based on simple access-count hotness. Evaluation versus RocksDB, KVell and NoveLSM shows up to 3.5× throughput generally and up to 7.9× under Zipf-like mixes, with lower latencies for mixed small/large workloads.

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" chapters (5)

1. 0:00Introduction
2. 0:28Background
3. 5:32Key Idea
4. 12:17Evaluation
5. 16:58Conclusion

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