The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2020
Filed:
Mar. 18, 2019
International Business Machines Corporation, Armonk, NY (US);
Yogesh R. Vedpathak, Chicago, IL (US);
Mingyu Li, Chicago, IL (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
A method includes a processing module issuing CAS-N compatible lists requests to storage units in a dispersed storage network (DSN) and when list request responses are received, determining whether associated data source(s) require rebuilding. When rebuilding is required the method continues with CAS-N compatible read requests for a read threshold number of being transmitted to the storage units. When read responses are received the method continues with the processing module determining whether state information for the data source(s) is unknown and whether there is an ongoing or aborted CAS-N operation associated with the data source(s). When the state information is known and there is no ongoing or aborted CAS-N operation associated with the data source(s) a CAS-N compatible message is transmitted to the data source(s)(CAS-N compatible casnDelete or casnDirectPromote request(s) will be sent to DS units in need of rebuilding based on determined rebuild type to bring associated data source(s) to healthy state).