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:
Jan. 06, 2015
Filed:
Sep. 30, 2011
John Colgrove, Los Altos, CA (US);
John Hayes, Mountain View, CA (US);
Ethan Miller, Santa Cruz, CA (US);
Joseph S. Hasbani, Palo Alto, CA (US);
Cary Sandvig, Palo Alto, CA (US);
John Colgrove, Los Altos, CA (US);
John Hayes, Mountain View, CA (US);
Ethan Miller, Santa Cruz, CA (US);
Joseph S. Hasbani, Palo Alto, CA (US);
Cary Sandvig, Palo Alto, CA (US);
PURE Storage, Inc., Mountain View, CA (US);
Abstract
A system and method for efficiently removing duplicate data blocks at a fine-granularity from a storage array. A data storage subsystem supports multiple deduplication tables. Table entries in one deduplication table have the highest associated probability of being deduplicated. Table entries may move from one deduplication table to another as the probabilities change. Additionally, a table entry may be evicted from all deduplication tables if a corresponding estimated probability falls below a given threshold. The probabilities are based on attributes associated with a data component and attributes associated with a virtual address corresponding to a received storage access request. A strategy for searches of the multiple deduplication tables may also be determined by the attributes associated with a given storage access request.