Systems, devices and methods using a solid state device as a caching medium with an SSD filtering or SSD pre-fetch algorithm
US11182077B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2018 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Oct 3, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/6024
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for determining when to load read I/O operations into an SSD cache medium for a physical storage medium of a data storage system can include maintaining an SSD filter bitmap with a plurality of bits, where each of the bits corresponds to a respective data block of the physical storage medium. The method can also include initially setting each of the bits to a first predetermined value, receiving a first read I/O operation directed to a particular data block of the physical storage medium and, in response to receiving the first read I/O operation, setting a bit corresponding to the particular data block to a second predetermined value. The method can further include receiving a second read I/O operation directed to the particular data block and, in response to receiving the second I/O operation, loading data for the particular data block into the SSD cache medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.