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    DEDUPLICATION SYSTEM WITHOUT REFERENCE COUNTING
    11.
    发明申请
    DEDUPLICATION SYSTEM WITHOUT REFERENCE COUNTING 有权

    公开(公告)号：US20210019295A1

    公开(公告)日：2021-01-21

    申请号：US16569428

    申请日：2019-09-12

    Applicant: Commvault Systems, Inc.

    Inventor： Deepak Raghunath ATTARDE ,  Manoj Kumar VIJAYAN

    IPC: G06F16/215 ,  G06F16/22 ,  G06F16/27

    Abstract: 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 (for tracking archive file contents) and a bitmap to mark which primary records are present in the secondary table. In another embodiment, once the marking phase is completed, the deduplication system uses the marked-up bitmap to identify the corresponding records from the primary table that can be 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 SYSTEM WITHOUT REFERENCE COUNTING
    12.
    发明申请
    DEDUPLICATION SYSTEM WITHOUT REFERENCE COUNTING 有权

    公开(公告)号：US20210019294A1

    公开(公告)日：2021-01-21

    申请号：US16569385

    申请日：2019-09-12

    Applicant: Commvault Systems, Inc.

    Inventor： Deepak Raghunath ATTARDE ,  Manoj Kumar VIJAYAN

    IPC: G06F16/215 ,  G06F16/22

    Abstract: 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 (for tracking archive file contents) and a bitmap to mark which primary records are present in the secondary table. In another embodiment, once the marking phase is completed, the deduplication system uses the marked-up bitmap to identify the corresponding records from the primary table that can be 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.

    DISTRIBUTED DEDUPLICATED STORAGE SYSTEM
    15.
    发明申请
    DISTRIBUTED DEDUPLICATED STORAGE SYSTEM 有权
    分布式重复存储系统

    公开(公告)号：US20150205815A1

    公开(公告)日：2015-07-23

    申请号：US14673586

    申请日：2015-03-30

    Applicant: CommVault Systems, Inc.

    Inventor： Manoj Kumar VIJAYAN ,  Rajiv KOTTOMTHARAYIL ,  Deepak Raghunath ATTARDE

    IPC: G06F17/30 ,  H04L29/08

    CPC classification number: G06F17/30156 ,  G06F3/067 ,  G06F11/1453 ,  G06F17/30097 ,  G06F17/3015 ,  G06F17/30312 ,  G06F17/30566 ,  H04L67/02 ,  H04L67/06

    Abstract: A distributed, deduplicated storage system according to certain embodiments is arranged in a parallel configuration including multiple deduplication nodes. Deduplicated data is distributed across the deduplication nodes. The deduplication nodes can be networked together and communicate with one another according using a light-weight, customized communication scheme (e.g., a scheme based on FTP or HTTP). In some cases, deduplication management information including deduplication signatures and/or other metadata is stored separately from the deduplicated data in deduplication management nodes, improving performance and scalability.

    Abstract translation: 根据某些实施例的分布式，重复数据消除的存储系统被布置成包括多个重复数据删除节点的并行配置。 重复数据删除节点上分发重复数据删除数据。 重复数据删除节点可以联网在一起，并使用轻量级的定制通信方案（例如，基于FTP或HTTP的方案）相互通信。 在某些情况下，包括重复数据消除签名和/或其他元数据的重复数据消除管理信息与重复数据删除管理节点中的重复数据删除数据分开存储，从而提高性能和可扩展性。

    RANSOMWARE DETECTION AND DATA PRUNING MANAGEMENT
    16.
    发明申请
    RANSOMWARE DETECTION AND DATA PRUNING MANAGEMENT 有权

    公开(公告)号：US20250045397A1

    公开(公告)日：2025-02-06

    申请号：US18800976

    申请日：2024-08-12

    Applicant: Commvault Systems, Inc.

    Inventor： PurnaChandra Sekhar BEDHAPUDI ,  Sri Karthik BHAGI ,  Deepak Raghunath ATTARDE ,  Arun Prasad AMARENDRAN ,  Amit Bhaskar AUSARKAR ,  Mrityunjay UPADHYAY

    IPC: G06F21/56 ,  G06F16/17 ,  G06F16/174

    Abstract: 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.

    EFFICIENT RECONSTRUCTION OF A DEDUPLICATION DATABASE
    20.
    发明申请
    EFFICIENT RECONSTRUCTION OF A DEDUPLICATION DATABASE 有权

    公开(公告)号：US20210019333A1

    公开(公告)日：2021-01-21

    申请号：US16569499

    申请日：2019-09-12

    Applicant: Commvault Systems, Inc.

    Inventor： Deepak Raghunath ATTARDE ,  Chandrashekar MARANNA ,  Suseela Sowmya SRIPADA ,  Manoj Kumar VIJAYAN

    IPC: G06F16/27 ,  G06F11/14

    Abstract: If a deduplication database becomes corrupted or is lost, the deduplication database may be reconstructed by restoring an earlier backup copy of the deduplication database. The backup copy of the deduplication database, however, may not be synced with the deduplicated data blocks that are presently stored in the secondary storage subsystem. To address the possibility of data loss and improve reconstruction timing, a deduplicated storage system is provided according to certain embodiments that uses one or more mechanisms to restore the deduplication database and resync with the secondary storage by using one or more journal files that track the data blocks that have been or may have been deleted from the secondary storage since the last deduplication database backup.

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