Read amplification reduction in a virtual storage system when compression is enabled for a zoned checksum scheme
US12045481B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2022 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Mar 30, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0689
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for reducing read application in a virtual storage system are provided. According to one embodiment, read amplification is reduced when AZCS compression is being utilized by avoiding restarting of a read process via a slow path via a RAID layer of the virtual storage system when a data block associated with a read request and obtained via a first fast path read has been found not to be compressed. Instead, a second fast path read may be performed to obtain the corresponding checksum. Alternatively, or additionally, heuristics may be used to predict the odds of the data block being compressed. For example, when information encoded within a PVBN of the data block that identifies the PVBN as being within a compressed AZCS zone has shown to be sufficiently/insufficiently predictive of the data block being compressed, then a flag may be set to enable/disable fast path reads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.