Determining when to apply writes received to data units being transferred to a secondary storage
US8214341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2008 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Jun 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2074
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided are a method, system, and article of manufacture for managing writes received to data units that are being transferred to a secondary storage as part of a mirror relationship. Synchronization information indicates data units to transfer from a primary storage to a secondary storage, wherein the synchronization information data is updated to indicate the transfer of one of the data units from the primary storage to the secondary storage. A storage controller receives a write request having an update to a target data unit comprising one of the data units indicated in the synchronization information that has not been transferred from the primary storage to the secondary storage. The write request is allowed to apply the update to the target data unit in response to transferring the data in the target data unit to a network adapter of the storage controller and before the data in the target data unit is transferred to the secondary storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.