Low latency direct access block storage in NVME-of ethernet SSD
US10733137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2017 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Nov 25, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/24569
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of low-latency direct data access to non-volatile flash memory in at least one NVMe-oF SSD device connected over Ethernet. The method includes transmitting, from a low-latency direct access (LL-DAX) block storage software layer at a host, a remote direct memory access (RDMA) write request to the flash memory. The RDMA write request includes data, a storage address, a length of a data transfer operation, and an operation code. The method also includes receiving, at the host, an RDMA level acknowledgement indicating that the data has been persisted to the flash memory. The method also includes transmitting, from the LL-DAX block storage software layer, an RDMA read request to the flash memory that includes a storage address, a length of a data transfer, and an operation code. The method also includes receiving, at the host, data packets from the flash memory corresponding to the RDMA read request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.