Mass storage system and method of operating using consistency checkpoints and destaging
US8255637B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2010 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Mar 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mass storage system and method incorporates a cache memory or a cache management module which handles dirty data using an access-based promotion replacement process through consistency checkpoints. The consistency checkpoints are associated with a global number of snapshots generated in the storage system. The consistency checkpoints are organized within the sequence of dirty data in an invariable order corresponding to storage volumes with the generated snapshots, such that, responsive to destaging a consistency checkpoint the global number of generated snapshots are recorded and then read during recovery of the failed storage system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.