NAND flash based content addressable memory
US8634247B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2013 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Jan 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2213/75
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A NAND Flash based content addressable memory (CAM) is used for a key-value addressed storage drive. The device can use a standard transport protocol such as PCI-E, SAS, SATA, eMMC, SCSI, and so on. A host writes a key-value pair to the drive, where the drive writes the keys along bit lines of a CAM NAND portion of the drive and stores the value in the drive. The drive then maintains a table linking the keys to location of the value. In a read process, the host provides a key to drive, which then broadcasts down the word lines of blocks storing the keys. Based on any matching bit lines, the tables can then be used to retrieve and supply the corresponding data to the host.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.