Hybrid Data Reliability for Emerging Key Value Storage Devices
summary
KVMD implements a hybrid reliability manager evaluated on prototype Samsung NVMe KV SSDs and supports 4–255 byte keys and up to 2 MB values. It plugs hashing, replication, splitting, packing, hashing as stateless mechanisms; replication (3x) yields roughly 1/3 throughput, splitting turns one write into k IOs so small-value throughput drops, and packing causes expensive updates. Measured against Linux mdadm RAID, throughput degradation is comparable or lower, rebuilds finish faster because recovery touches only written objects, and every value carries a checksum verification cost.
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