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    RISK BASED REBUILD OF DATA OBJECTS IN AN ERASURE CODED STORAGE SYSTEM
    1.
    发明申请
    RISK BASED REBUILD OF DATA OBJECTS IN AN ERASURE CODED STORAGE SYSTEM 审中-公开

    公开(公告)号：US20170249213A1

    公开(公告)日：2017-08-31

    申请号：US15055484

    申请日：2016-02-26

    Applicant: NetApp, Inc.

    Inventor： David Anthony Slik ,  Shehbaz Jaffer ,  Sethuraman Subbiah ,  Keith Arnold Smith ,  Giridhar Appaji Nag Yasa ,  Atish Kathpal

    IPC: G06F11/10 ,  G06F3/06 ,  H03M13/15

    Abstract: A rebuild node of a storage system can assess risk of the storage system not being able to provide a data object. The rebuild node(s) uses information about data object fragments to determine health of a data object, which relates to the risk assessment. The rebuild node obtains object fragment information from nodes throughout the storage system. With the object fragment information, the rebuild node(s) can assess object risk based, at least in part, on the object fragments indicated as existing by the nodes. To assess object risk, the rebuild node(s) treats absent object fragments (i.e., those for which an indication was not received) as lost. When too many object fragments are lost, an object cannot be rebuilt. The erasure coding technique dictates the threshold number of fragments for rebuilding an object. The risk assessment per object influences rebuild of the objects.

    Risk based rebuild of data objects in an erasure coded storage system
    5.
    发明授权
    Risk based rebuild of data objects in an erasure coded storage system 有权

    公开(公告)号：US10514984B2

    公开(公告)日：2019-12-24

    申请号：US15055484

    申请日：2016-02-26

    Applicant: NetApp, Inc.

    Inventor： David Anthony Slik ,  Shehbaz Jaffer ,  Sethuraman Subbiah ,  Keith Arnold Smith ,  Giridhar Appaji Nag Yasa ,  Atish Kathpal

    IPC: G06F11/00 ,  G06F11/10 ,  H03M13/15 ,  G06F3/06 ,  H03M13/13 ,  H03M13/37

    Abstract: A rebuild node of a storage system can assess risk of the storage system not being able to provide a data object. The rebuild node(s) uses information about data object fragments to determine health of a data object, which relates to the risk assessment. The rebuild node obtains object fragment information from nodes throughout the storage system. With the object fragment information, the rebuild node(s) can assess object risk based, at least in part, on the object fragments indicated as existing by the nodes. To assess object risk, the rebuild node(s) treats absent object fragments (i.e., those for which an indication was not received) as lost. When too many object fragments are lost, an object cannot be rebuilt. The erasure coding technique dictates the threshold number of fragments for rebuilding an object. The risk assessment per object influences rebuild of the objects.

    VIRTUAL MACHINE REBOOT INFORMATION PERSISTENCE INTO HOST MEMORY
    6.
    发明申请
    VIRTUAL MACHINE REBOOT INFORMATION PERSISTENCE INTO HOST MEMORY 有权
    虚拟机重新启动信息持续进入主机内存

    公开(公告)号：US20160055018A1

    公开(公告)日：2016-02-25

    申请号：US14465877

    申请日：2014-08-22

    Applicant: NetApp Inc.

    Inventor： Ameya Prakash Usgaonkar ,  Mangesh Chitnis ,  Shehbaz Jaffer

    IPC: G06F9/455

    CPC classification number: G06F9/45533 ,  G06F9/4401 ,  G06F9/45554 ,  G06F9/45558 ,  G06F9/461 ,  G06F9/485 ,  G06F11/1417 ,  G06F2009/45575 ,  G06F2009/45583 ,  G06F2009/45587 ,  G06F2009/45591

    Abstract: One or more techniques and/or systems are provided for virtual machine rebooting. A host machine may host a virtual machine. Virtual machine reboot information, used to reboot the virtual machine in the event of a failure or restart of the virtual machine, may be identified (e.g., file system metadata buffers, a virtual non-volatile random access memory log, user data buffers, and/or data used to reboot the virtual machine such as to perform a reboot mounting operation and/or a reboot replay operation of a volume of data associated with the virtual machine). The virtual machine reboot information may be cached within relatively fast host memory of the host machine (e.g., instead of merely within a relatively slower hard drive or other storage device). In this way, the cached virtual machine reboot information may be quickly retrieved so that the virtual machine may be rebooted in a relatively shorter amount of time.

    Abstract translation: 为虚拟机重新启动提供了一个或多个技术和/或系统。 主机可以托管虚拟机。 虚拟机重启信息，用于在虚拟机发生故障或重新启动的情况下重新引导虚拟机，可以被识别（例如，文件系统元数据缓冲区，虚拟非易失性随机存取存储器日志，用户数据缓冲区和 /或用于重新启动虚拟机的数据，例如执行与虚拟机相关联的数据量的重新启动安装操作和/或重新启动重放操作）。 虚拟机重新启动信息可以被缓存在主机的相对较快的主机存储器内（例如，而不仅仅是在相对较慢的硬盘驱动器或其他存储设备内）。 以这种方式，可以快速检索缓存的虚拟机重启信息，以便可以在相对较短的时间内重启虚拟机。

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