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:
Aug. 19, 2025
Filed:
Jan. 19, 2024
Dell Products L.p., Hopkinton, MA (US);
Vladimir Shveidel, Pardes-Hana, IL;
Socheavy D. Heng, Framingham, MA (US);
Jonathan Volij, Meitar, IL;
Dell Products L.P., Hopkinton, MA (US);
Abstract
In at least one embodiment, destaging a write of a user data (UD) log may include: performing deduplication that determines content written by the write to a logical address LA is a duplicate of existing content; and establishing mapping information of a chain of metadata (MD) pages mapping LA to a physical address PA storing the existing content, wherein the chain includes a MD leaf page and a VLB (virtual layer block) page. An update of a MD log can update an indirect pointer (IDP) field of a MD leaf entry of the MID leaf page to reference a VLB entry of the VLB page where the VLB entry further includes PA. A second update of the MD log can increment a reference count of the VLB entry. The second update can be recorded blindly in the MD log without reading or accessing the reference count during destaging the write.