Comm Vault Systems, Inc.

Deepak Raghunath Attarde

Manoj Kumar Vijayan

Rajiv Kottomtharayil

Hetalkumar N Joshi

Parag Gokhale

Prakash Varadharajan

Anand Prahlad

Manoj Kumar Vijayan Retnamma

Ho-Chi Chen

Saurabh Agrawal

Srikant Viswanathan

Pratik S Rana

Paramasivam Kumarasamy

Pavan Kumar Reddy Bedadala

Satish Chandra Kilaru

Jaidev Oppath Kochunni

Ramachandra Reddy Ankireddypalle

Henry Wallace Dornemann

Amit Mitkar

Marcus S Muller

Chandrashekar Maranna

Abhishek Narulkar

Anand Vibhor

Amey Vijaykumar Karandikar

Varghese Devassy

Jun H Ahn

Ashwin Gautamchand Sancheti

Michael F Klose

Ganesh Haridas

Sri Karthik Bhagi

Arun Prasad Amarendran

Mrityunjay Upadhyay

Amit Bhaskar Ausarkar

Kamleshkumar K Lad

PurnaChandra Sekhar Bedhapudi

An illustrative approach accelerates file indexing operations for block-level backup copies in a data storage management system. A cache storage area is maintained for locally storing and serving key data blocks, thus relying less on retrieving data on demand from the backup copy. File indexing operations are used for populating the cache storage area for speedier retrieval during subsequent live browsing of the same backup copy, and vice versa. The key data blocks cached while file indexing and/or live browsing an earlier backup copy help to pre-fetch corresponding data blocks of later backup copies, thus producing a beneficial learning cycle. The approach is especially beneficial for cloud and tape backup media, and is available for a variety of data sources and backup copies, including block-level backup copies of virtual machines (VMs) and block-level backup copies of file systems, including UNIX-based and Windows-based operating systems and corresponding file systems.

Cache management for faster live browsing and file indexing of backup copies, including block-level backup copies of virtual machines and/or file systems

The disclosed enhancements optimize the use of the live browse cache and pseudo-disk storage areas, improving metadata handling so that it can be used more effectively to speed up live browse and file indexing of backup copies in a data storage management system. The enhancements operate granularly to identify within each extent being backed up smaller sectors that comprise metadata. The disclosed approach pre-fetches the metadata of the backup copy before allowing the file scan of the file indexing and/or the live browse operation to proceed. The backup operation, the file indexing operation, and the live browse operation are enhanced to handle the more granular metadata sectors without changing the granularity of the full extents generated and stored in the backup.

Lightweight metadata handling for file indexing and live browse of backup copies

This application relates to ransomware detection and data pruning management. Ransomware typically involves an I/O heavy process of encrypting data files and/or deleting or renaming the original files. Thus, ransomware attacks may be detected by analyzing the I/O activity in a given file system. In some embodiments, a software module running on a client machine manages copying, archiving, migrating, and/or replicating of primary data and restoring and/or pruning secondary data (e.g., backup copies of the primary data). When a potential ransomware attack is detected, the software module is immediately stopped so that the software module does not prune any data that may need to be restored. Upon receiving user input that indicates that the client machine is not under a ransomware attack, the software module is allowed to resume its operations, including pruning of the secondary data.

Ransomware detection and data pruning management

A deduplicated storage system is provided according to certain embodiments that uses one or more mechanisms to update the deduplication database and remove records corresponding to data blocks that have been or will be erased from the secondary copies, without using or tracking reference counting values. Some embodiments described herein use a secondary table to identify the corresponding records from the primary table that can be removed and/or moved to another table for storing 'zero-reference' data blocks. In other embodiments, the system will then traverse the “zero-reference” table and remove those primary data blocks from secondary storage devices.

Deduplication database without reference counting

A method and system for providing information management of data from hosted services receives information management policies for a hosted account of a hosted service, requests data associated with the hosted account from the hosted service, receives data associated with the hosted account from the hosted service, and provides a preview version of the received data to a computing device. In some examples, the system indexes the received data to associate the received data with a user of an information management system, and/or provides index information related to the received data to the computing device.

Information management of data associated with multiple cloud services

Enhanced file indexing, live browsing, and restoring of backup copies of virtual machines and/or file systems by populating and tracking a cache storage area and a backup index

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.

Block-level single instancing

Enhancing file indexing of block-level backup copies of virtual machines and/or file systems by populating and tracking a cache storage area and a backup index

An illustrative approach accelerates live browse operations for block-level backup copies in a data storage management system. A cache storage area is maintained for locally storing and serving key data blocks, thus relying less on retrieving data on demand from backup copies. Live browse operations are used for populating the cache storage area for speedier retrieval during subsequent live browsing and/or file indexing of the same backup copy, and vice versa. The key data blocks cached while file indexing and/or live browsing an earlier backup copy help to pre-fetch corresponding data blocks of later backup copies, thus producing a beneficial learning cycle. The approach is especially beneficial for cloud and tape backup media, and is available for a variety of data sources and backup copies, including block-level backup copies of virtual machines (VMs) and block-level backup copies of file systems, including UNIX-based and Windows-based operating systems and corresponding file systems.

Live browse cache enhacements for live browsing block-level backup copies of virtual machines and/or file systems

Described in detail herein are systems and methods for managing single instancing data. Using a single instance database and other constructs (e.g. sparse files), data density on archival media (e.g. magnetic tape) is improved, and the number of files per storage operation is reduced. According to one aspect of a method for managing single instancing data, for each storage operation, a chunk folder is created on a storage device that stores single instancing data. The chunk folder contains three files: 1) a file that contains data objects that have been single instanced; 2) a file that contains data objects that have not been eligible for single instancing; and 3) a metadata file used to track the location of data objects within the other files. A second storage operation subsequent to a first storage operation contains references to data objects in the chunk folder created by the first storage operation instead of the data objects themselves.

Systems and methods for managing single instancing data

Described are systems and methods for storing a variable number of instances of data objects (e.g., 1, 2, 3, or up to N&#x2212;1 instances, where N is the number of instances of the data object included in primary data) in secondary storage across a data storage network. In some examples, a system for storing a variable number of instances of data objects includes, one or more computing devices storing a set of data objects and multiple storage devices distinct from the one or more computing devices. Each of the multiple storage devices is configured to store at least a single instance of a data object. The system also includes a database configured to store information associated with the data objects. This information includes substantially unique identifiers for the data objects and, for each of the data objects, a number of instances of the data object stored on the multiple storage devices.

Storing a variable number of instances of data objects

Techniques for enabling user search of content stored in a file archive include providing a search interface comprising a search rules portion and an action rules portion, receiving a file archive search criterion comprising at least one search rule, and searching the file archive using the search criterion. The techniques also include generating a set of files filtered using the search criterion and performing an action specified in the action rules portion on a file included in the set of files.

Search filtered file system using secondary storage, including multi-dimensional indexing and searching of archived files

Growing community of inventors

Marlboro, NJ, United States of America

Deepak Raghunath Attarde