Journal tiering in a continuous data protection system using deduplication-based storage
US9383937B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | May 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0685
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, a method includes checking periodically, using a processor, for a value associated with data in a data block in a higher tier journal stored on a first storage array having deduplication-based functionality and copying the data in the data block from the higher tier journal to a lower tier journal in a second storage array if the data in the data block exists only in an UNDO stream in the higher tier journal. The first storage array and the second storage array are used in a continuous data protection system to replicate a volume. The method also includes replacing the data in the data block in the journal with a zero block if the data in the data block exists only in the UNDO stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.