Data center

Memory management

Key (lock)

Bandwidth (computing)

Government (linguistics)

Computer network

Latency (audio)

Memory controller

Operating system

Philosophy

Embedded system

CAS latency

Universal memory

Economic shortage

Computer science

Linguistics

Interleaved memory

Computer hardware

Dram

Telecommunications

Semiconductor memory

Popular SSD-based key-value stores consume a large amount of DRAM in order to provide high-performance database operations. However, DRAM can be expensive for data center providers, especially given recent global supply shortages that have resulted in increasing DRAM costs. In this work, we design a key-value store, MyNVM, which leverages an NVM block device to reduce DRAM usage, and to reduce the total cost of ownership, while providing comparable latency and queries-per-second (QPS) as MyRocks on a server with a much larger amount of DRAM. Replacing DRAM with NVM introduces several challenges. In particular, NVM has limited read bandwidth, and it wears out quickly under a high write bandwidth.

Reducing DRAM footprint with NVM in Facebook