Metadata management for virtual volumes
US8892846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2013 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Oct 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0689
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, apparatus, and systems, including computer programs encoded on a computer storage medium, manage metadata for virtual volumes. In some implementations, a method includes: loading into memory at least a portion of metadata for a virtual volume (VV) that spans data extents of different persistent storage devices, wherein the metadata comprises virtual metadata block (VMB) descriptors and virtual metadata blocks (VMBs); mapping an address of the VV to a VMB number and an index of an extent pointer within a VMB identified by the VMB number, wherein the extent pointer indicates an extent within one of the different persistent storage devices; locating a VMB descriptor in the memory based on the VMB number; and locating the identified VMB in the memory or not in the memory based on the located VMB descriptor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.