Method and apparatus for cascaded replication using a multi splitter
US9081754B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Jul 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/855
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Conventional method of replication do not allow cascaded replication with journaling. However, in example embodiments of the present invention, a splitter in storage or in the data path may split a single volume to multiple DPA targets. The splitter will intercept data arriving to the volume and split the data to another DPA, thereby allowing cascaded replication. In certain embodiments, the DPA may notify the splitter about a point of consistency because the DPA does not distribute IOs with write order fidelity at all times and only some points are write order fidelity consistent. Thus, the DPA may notify the splitter about a consistent point and the splitter will send notifications about the consistent points to the second DPA, allowing the volumes to have consistent points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.