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    Method for restoring virtual machine state from a checkpoint file
    2.
    发明授权
    Method for restoring virtual machine state from a checkpoint file 有权
    从检查点文件恢复虚拟机状态的方法

    公开(公告)号：US09053065B2

    公开(公告)日：2015-06-09

    申请号：US13710215

    申请日：2012-12-10

    申请人： VMware, Inc.

    发明人： Alexander Thomas Garthwaite ,  Yury Baskakov ,  Irene Zhang ,  Kevin Scott Christopher ,  Jesse Pool

    IPC分类号： G06F12/00 ,  G06F12/16

    CPC分类号： G06F12/16 ,  G06F9/45558 ,  G06F9/461 ,  G06F2009/45575 ,  G06F2009/45583

    摘要： A process for lazy checkpointing is enhanced to reduce the number of read/write accesses to the checkpoint file and thereby speed up the checkpointing process. The process for restoring a state of a virtual machine (VM) running in a physical machine from a checkpoint file that is maintained in persistent storage includes the steps of detecting access to a memory page of the virtual machine that has not been read into physical memory of the VM from the checkpoint file, determining a storage block of the checkpoint file to which the accessed memory page maps, writing contents of the storage block in a buffer, and copying contents of a block of memory pages that includes the accessed memory page from the buffer to corresponding locations of the memory pages in the physical memory of the VM. The storage block of the checkpoint file may be compressed or uncompressed.

    摘要翻译： 增强了用于延迟检查点的过程，以减少对检查点文件的读/写访问次数，从而加快了检查点处理过程。 从维护在持久存储器中的检查点文件恢复在物理机器中运行的虚拟机（VM）的状态的过程包括以下步骤：检测对尚未被读入物理存储器的虚拟机的存储器页面的访问 从所述检查点文件确定所述VM的存储块，确定所访问的存储器页映射到的所述检查点文件的存储块，将所述存储块的内容写入缓冲器，以及将包括所访问的存储器页的存储器页块的内容从 缓冲区到VM的物理内存中的内存页的相应位置。 检查点文件的存储块可以被压缩或未压缩。

    Saving and Restoring State Information for Virtualized Computer Systems
    4.
    发明申请
    Saving and Restoring State Information for Virtualized Computer Systems 审中-公开
    保存和恢复虚拟化计算机系统的状态信息

    公开(公告)号：US20160253201A1

    公开(公告)日：2016-09-01

    申请号：US15148890

    申请日：2016-05-06

    申请人： VMware, Inc.

    发明人： Irene Zhang ,  Kenneth Charles Barr ,  Ganesh Venkitachalam ,  Irfan Ahmad ,  Alex Garthwaite ,  Jesse Pool

    IPC分类号： G06F9/455

    CPC分类号： G06F9/45558 ,  G06F9/461 ,  G06F9/485 ,  G06F9/5016 ,  G06F11/1438 ,  G06F12/08 ,  G06F2009/45575 ,  G06F2009/45583

    摘要： Methods and apparatus for saving and/or restoring state information for virtualized computing systems are described. An example apparatus includes a physical memory and a virtual machine monitor to: in response to a request to suspend operation of a virtual machine, place a trace on a memory page in the physical memory to detect at least one of a read access or a write access that occurs when state information of the virtual machine is saved in response to the request, the memory page associated with virtual memory hosted by the virtual machine, while the virtual machine continues to operate after the request, initiate storing of the virtual memory of the virtual machine, and in response to a trigger of the trace, store an indication that the memory page is an active memory page.

    摘要翻译： 描述用于保存和/或恢复虚拟化计算系统的状态信息的方法和装置。 一种示例性装置包括：物理存储器和虚拟机监视器，用于：响应于暂停虚拟机的操作的请求，在物理存储器中的存储器页面上放置跟踪以检测读取访问或写入中的至少一个 响应于请求保存虚拟机的状态信息时发生的访问，与虚拟机托管的虚拟存储器相关联的存储器页面，同时虚拟机在请求之后继续操作，开始存储虚拟机的虚拟存储器 虚拟机，并且响应于跟踪的触发，存储指示存储器页面是活动存储器页面。

    Method for saving virtual machine state to a checkpoint file
    6.
    发明授权
    Method for saving virtual machine state to a checkpoint file 有权
    将虚拟机状态保存到检查点文件的方法

    公开(公告)号：US09053064B2

    公开(公告)日：2015-06-09

    申请号：US13710185

    申请日：2012-12-10

    申请人： VMware, Inc.

    发明人： Alexander Thomas Garthwaite ,  Yury Baskakov ,  Irene Zhang ,  Kevin Scott Christopher ,  Jesse Pool

    IPC分类号： G06F12/00 ,  G06F12/16

    CPC分类号： G06F12/16 ,  G06F11/00

    摘要： A process for lazy checkpointing a virtual machine is enhanced to reduce the number of read/write accesses to the checkpoint file and thereby speed up the checkpointing process. The process for saving a state of a virtual machine running in a physical machine to a checkpoint file maintained in persistent storage includes the steps of copying contents of a block of memory pages, which may be compressed, into a staging buffer, determining after the copying if the buffer is full, and upon determining that the buffer is full, saving the buffer contents in a storage block of the checkpoint file.

    摘要翻译： 增强了对虚拟机进行懒惰检查点的过程，以减少对检查点文件的读/写访问次数，从而加快了检查点处理过程。 将在物理机器中运行的虚拟机的状态保存到持久存储器中维护的检查点文件的过程包括以下步骤：将可压缩的存储器页块的内容复制到暂存缓冲器中，在复制之后确定 如果缓冲区已满，并且在确定缓冲区已满时，将缓冲区内容保存在检查点文件的存储块中。