Data storage system with multi-level, scalable metadata structure
US10146456B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2016 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Mar 9, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0689
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data storage system creates, maintains and utilizes logical storage structures including (1) a pool of device extents on user devices, organized into data portions of mapped RAID groups each having a data portion and a RAID group metadata element having (i) a basic portion and (ii) a mapping portion mapping each set of device extents to logical RAID extents per RAID type, (2) a pool logical device (e.g., an internal mapped RAID) in the pool, storing the mapping portions of the metadata elements of the mapped RAID group, and (3) a system logical device on separate system devices, storing (i) the basic portions of the metadata elements of the RAID groups, and (ii) a pool metadata element including a pool mapping portion for the pool logical device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.