Method for removing duplicate data from a storage array

US8930307B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8930307-B2
Application numberUS-201113250570-A
CountryUS
Kind codeB2
Filing dateSep 30, 2011
Priority dateSep 30, 2011
Publication dateJan 6, 2015
Grant dateJan 6, 2015

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Abstract

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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.

First claim

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What is claimed is: 1. A computer system comprising: a non-transitory data storage medium; a first fingerprint table comprising a first plurality of entries and a second fingerprint table comprising a second plurality of entries, wherein each entry of the first and the second plurality of entries is configured to store a fingerprint corresponding to a data component already stored in the system, wherein the first fingerprint table has fewer entries than the second fingerprint ta…

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What does patent US8930307B2 cover?
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 ent…
Who is the assignee on this patent?
Colgrove John, Hayes John, Miller Ethan, and 3 more
What technology area does this patent fall under?
Primary CPC classification G06F3/0608. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Jan 06 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).