Host Memory Buffer - kylessukaichang/kylessukaichang.github.io GitHub Wiki

• National Center for Biotechnology Information
  • HMB in DRAM-less NVMe SSDs: Their usage and effects on performance

• HMB in DRAM-less NVMe SSDs: Their usage and effects on performance
  • Use of HMB in DRAM-less SSDs
    • Use of HMB as a read cache
    • Use of HMB as a write buffer
    • Use of HMB as a mapping table cache

The feature uses a portion of host memory to manage flash memory within an SSD, and delivers similar performance as SSDs with DRAM when the feature is turned on.

• HMB, which was enabled through NVMe 1.2 specifications, allows SSDs to utilize some of the DRAM attached to the host, or central processing unit (CPU), through the PCIe connection instead of requiring DRAM to support an SSD.

• Based on PCIe's Direct Memory Access