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:
Nov. 01, 2022
Filed:
Sep. 15, 2021
Dell Products, L.p., Hopkinton, MA (US);
Venkata Ippatapu, Westborough, MA (US);
Jeremy O'Hare, Westborough, MA (US);
Anoop Raghunathan, Ashland, MA (US);
Dell Products, L.P., Hopkinton, MA (US);
Abstract
A deduplication engine maintains a deduplication hash table containing a plurality of fingerprint entries identifying a track of current data and a hash value computed from the data currently stored at the identified track. A hash table manager implements a dynamic deduplication hash table management process, that includes a fingerprint entry purge process and a fingerprint entry re-entry process. The purge process is implemented on the deduplication hash table to remove selected fingerprint entries of tracks of data currently stored on the managed drives from the deduplication hash table based on a first set of Thin Device (TDev) selection rules and a second set of track selection purge rules. The re-entry process is implemented on the deduplication hash table to re-enter selected fingerprint entries into the deduplication hash table based on a third set of TDev selection rules and a fourth set of track selection re-entry rules.