BLOCK-LEVEL SINGLE INSTANCING

WIPO Patent Application WO/2010/135136

A3

Described in detail herein are systems and methods for single instancing blocks of data in a data storage system. For example, the data storage system may include multiple computing devices (e.g., client computing devices) that store primary data. The data storage system may also include a secondary storage computing device, a single instance database, and one or more storage devices that store copies of the primary data (e.g., secondary copies, tertiary copies, etc.). The secondary storage computing device receives blocks of data from the computing devices and accesses the single instance database to determine whether the blocks of data are unique (meaning that no instances of the blocks of data are stored on the storage devices). If a block of data is unique, the single instance database stores it on a storage device. If not, the secondary storage computing device can avoid storing the block of data on the storage devices.

ATTARDE DEEPAK RAGHUNATH (US)
KOTTOMTHARAYIL RAJIV (US)
VIJAYAN MANOJ KUMAR (US)

PCT/US2010/034676

February 17, 2011

May 13, 2010

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COMMVAULT SYSTEMS INC (US)
ATTARDE DEEPAK RAGHUNATH (US)
KOTTOMTHARAYIL RAJIV (US)
VIJAYAN MANOJ KUMAR (US)

G06F15/16; G06F3/06; G06F9/06

US20050210460A1	2005-09-22
US6928459B1	2005-08-09
US20020112022A1	2002-08-15
US20090106480A1	2009-04-23

AHMANN, William, F. et al. (P.O. Box 1247Seattle, WA, US)

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