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:
Jun. 22, 2021
Filed:
Mar. 13, 2020
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Vladimir Shveidel, Pardes-Hana, IL;
Dror Zalstein, Givatayim, IL;
Dennis Rusakov, Rishon Lezion, IL;
Adi Katzengold, Ramat Gan, IL;
Bar David, Rishon Lezion, IL;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Techniques for handling journal space in a storage cluster with multiple delta log instances. The techniques include writing delta updates for a respective metadata type to an 'active' set of data containers in a delta log instance and raw delta updates to a raw delta log, switching a designation of the 'active' set of data containers from “active” to “de-staging” once one or more of the “active” set of data containers has been filled, writing a bookmark for the respective metadata type to the raw delta log and a bookmark list, determining that a de-staging operation has been completed for writing the delta updates from the “de-staging” set of data containers to a storage array, determining that the bookmark for the respective metadata type is the oldest bookmark in the list, and reclaiming space between a tail of the raw delta log and the bookmark written to the raw delta log.