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. 04, 2013
Filed:
Jun. 30, 2009
Richard Ruef, Livermore, CA (US);
Kurt Everson, Missouri City, TX (US);
Nickolay Dalmatov, Saint-Petersburg, RU;
William Carl Biester, Danville, CA (US);
Richard Ruef, Livermore, CA (US);
Kurt Everson, Missouri City, TX (US);
Nickolay Dalmatov, Saint-Petersburg, RU;
William Carl Biester, Danville, CA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A method, article of manufacture, and apparatus for managing data commonality in a Merkle tree is disclosed. Reference counts are associated with a node in the Merkle tree. Data commonality is detected and the root of the detected data commonality is determined. If a node is the root node of the detected data commonality, the nodes reference count is incremented. When an object is deleted, the root node of the object is determined. The reference count of the node is decremented. If the count reaches zero, the node is removed from the Merkle tree, and its child nodes are decremented.