Method and system for VM-granular SSD/FLASH cache live migration
US9055119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2013 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Nov 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/5681
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The instant disclosure describes embodiments of a system and method for migrating virtual machine (VM)-specific content cached in a solid state drive (SSD) attached to an original host. During operation, the original host receives event indicating an upcoming migration of a VM to a destination host. In response, the original host transmits a set of metadata associated with the SSD cache to the destination host. The metadata indicates a number of data blocks stored in the SSD cache, thereby allowing the destination host to pre-fetch data blocks specified in the metadata from a storage shared by the original host and the destination host. Subsequently, the original host receives a power-off event for the VM, and transmits a dirty block list to the destination. The dirty block list specifies one or more data blocks that have changed since the transmission of the metadata.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.