Dynamic data placement for replicated raid in a storage system
US10997026B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2019 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Dec 27, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/855
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for destaging data to a storage device set that is arranged to maintain M replicas of the data, the storage device set having M primary storage devices and N secondary storage devices, the method comprising: detecting a destage event; and in response to the destage event, destaging the data item that is stored in a journal, the destaging including: issuing M primary write requests for storing the data item, each of the M primary write requests being directed to a different one of the M primary storage devices; in response to detecting that L of the primary write requests have failed, issuing L secondary write requests for storing the data item, each of the L secondary write requests being directed to a different secondary storage device; updating a bitmap to identify all primary and secondary storage devices where the data item has been stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.