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:
May. 02, 2023
Filed:
Sep. 10, 2021
Hitachi, Ltd., Tokyo, JP;
Kazuki Mizukami, Tokyo, JP;
Hiroaki Miyata, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
User data and redundant codes are stored in a distributed manner, and data is read while suppressing performance degradation due to the occurrence of a failure. If a first node in a distributed storage system receives a read request from a host to read the user data when a storage device of its own node is blocked, the first node executes a first collection read request which requests recovery of data from the secondary redundant code corresponding to target data of the read request; and if at least part of the target data has failed to be recovered according to the first collection read request, regarding insufficient data among a plurality of pieces of data which are necessary to recover the target data by using the primary redundant code, the first node executes a second collection read request which requests recovery of the insufficient data from the secondary redundant code.