US 2014/0372379 A1 · METHOD AND SYSTEM FOR DATA BACKUP

Abstract

The present invention relates to a method, system, and computer program product for data backup, the method comprising: performing first chunking on current data by using the same chunking method as that used by original backup data to obtain a current chunk; calculating hash value of the current chunk; and acquiring, from a hash value table of the original backup data, an identifier of a matched chunk whose hash value is the same as the calculated hash value of the current chunk, and incrementing number of continuous matched chunks by one. Since the pertinence between original backup data and current data is maximally utilized, performance of de-duplication method can be efficiently improved.

Claims10

Dependent claims

A system for data backup, wherein, there is original backup data and current data to be backed up, the system comprising:

a chunking unit configured to perform first chunking on the current data by using the same chunking method as that used by the original backup data to obtain a current chunk;
a calculating unit configured to calculate hash value of the current chunk;
and
an acquiring unit configured to acquire, from a hash value table of the original backup data, an identifier of a matched chunk whose hash value is the same as the calculated hash value of the current chunk, and to increment number of continuous matched chunks by one.

1 more element

A computer program product for data backup, wherein, there is original backup data and current data to be backed up, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code executable by a processor to:

perform first chunking on the current data by using the same chunking method as that used by the original backup data to obtain a current chunk;
calculate hash value of the current chunk;
and
acquire, from a hash value table of the original backup data, an identifier of a matched chunk whose hash value is the same as the calculated hash value of the current chunk, and increment number of continuous matched chunks by one.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/471,183Filed 28 Aug 2014

Priority

CN 201210266482.630 Jul 2012

Published

18 Dec 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06F 11/1469
Management of the backup or restore process: backup restoration techniques
G06F 11/1451
Management of the data involved in backup or backup restore: by selection of backup contents
G06F 11/1453
Management of the data involved in backup or backup restore: using de-duplication of the data
G06F 16/215
Design, administration or maintenance of databases: improving data quality; Data cleansing, e.g. de-duplication, removing invalid entries or…

Method and system for data backup

Life of this patent

Method and system for data backup

Life of this patent

Abstract

Claims10