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:
Mar. 31, 2015
Filed:
Mar. 28, 2011
Assaf Natanzon, Ramat Gan, IL;
Saar Cohen, Moshav Mishmeret, IL;
Lev Ayzenberg, Petakh-Tikva, IL;
Ariel Kulik, Rehovot, IL;
Assaf Natanzon, Ramat Gan, IL;
Saar Cohen, Moshav Mishmeret, IL;
Lev Ayzenberg, Petakh-Tikva, IL;
Ariel Kulik, Rehovot, IL;
EMC Corporation, Hopkinton, MA (US);
Abstract
The punch command may be replicated in a replication environment including a production site and a replication site. The solution includes implementing a punch command to free storage received at a replication site in a replication environment by applying the punch command to storage at the replication site and writing data being freed from the storage at the replication site to an undo stream of a journal at the replication site. If the punch command is not supported, a command to write zeros may be used. Further, an unpunch command is provided for properly undoing a punch command and storing data written to the volume before the punch command freed the storage. Additionally, large punch commands may be split into a plurality to smaller punch commands for efficient journal management. Additionally, volume space may be reclaimed by writing a punch command to the journal instead of zeros.