公开(公告)号：US20130067277A1

公开(公告)日：2013-03-14

申请号：US13670319

申请日：2012-11-06

Applicant: VMware, Inc.

Inventor： Raviprasad Mummidi

IPC: G06F12/16 ,  G06F17/30 ,  G06F11/14

CPC classification number: G06F11/2097 ,  G06F11/2038 ,  G06F2201/815

Abstract: A checkpointing fault tolerance network architecture enables a backup computer system to be remotely located from a primary computer system. An intermediary computer system is situated between the primary computer system and the backup computer system to manage the transmission of checkpoint information to the backup VM in an efficient manner. The intermediary computer system is networked to the primary VM through a first connection and is networked to the backup VM through a second connection. The intermediary computer system identifies updated data corresponding to memory pages that have been less frequently modified by the primary VM and transmits such updated data to the backup VM through the first connection. In such manner, the intermediary computer system holds back updated data corresponding to more frequently modified memory pages, since such memory pages may be more likely to be updated again in the future.

Abstract translation: 检查点容错网络架构使备份计算机系统能够远离主计算机系统。 中间计算机系统位于主计算机系统和备用计算机系统之间，以有效的方式管理检查点信息传输到备份虚拟机。 中间计算机系统通过第一连接与主虚拟机联网，并通过第二连接与备用虚拟机联网。 中间计算机系统识别与主VM不太频繁修改的存储器页对应的更新数据，并通过第一连接将这种更新的数据发送到备份VM。 以这种方式，中间计算机系统保持对应于更频繁修改的存储器页面的更新数据，因为这样的存储器页面将来可能再次被更新。

公开(公告)号：US08793428B2

公开(公告)日：2014-07-29

申请号：US13747159

申请日：2013-01-22

Applicant: VMware, Inc.

Inventor： Qasim Ali ,  Raviprasad Mummidi ,  Kiran Tati

IPC: G06F12/00 ,  G06F13/00 ,  G06F13/28

CPC classification number: G06F12/08 ,  G06F9/455 ,  G06F11/3471 ,  G06F11/3485 ,  G06F12/1009 ,  G06F2201/815

Abstract: A system for identifying an exiting process and removing traces and shadow page table pages corresponding to the process' page table pages. An accessed minimum virtual address is maintained corresponding to an address space. In one embodiment, whenever a page table entry corresponding to the accessed minimum virtual address changes from present to not present, the process is determined to be exiting and removal of corresponding trace and shadow page table pages is begun. In a second embodiment, consecutive present to not-present PTE transitions are tracked for guest page tables on a per address space basis. When at least two guest page tables each has at least four consecutive present to not-present PTE transitions, a next present to not-present PTE transition event in the address space leads to the corresponding guest page table trace being dropped and the shadow page table page being removed.

Abstract translation: 用于识别退出处理并移除与进程页表页对应的跟踪和影子页表页的系统。 对应于地址空间维护访问的最小虚拟地址。 在一个实施例中，每当与所访问的最小虚拟地址相对应的页表条目从当前改变为不存在时，则确定该进程正在退出并且开始删除相应的跟踪和影子页表页。 在第二实施例中，针对每个地址空间的访客页表跟踪连续呈现到不存在的PTE转换。 当至少两个访客页表各自具有至少四个连续呈现到不存在的PTE转换时，地址空间中的下一个不存在的PTE转换事件将导致对应的客户页表跟踪被丢弃，并且阴影页表 被删除的页面

公开(公告)号：US20130097120A1

公开(公告)日：2013-04-18

申请号：US13712693

申请日：2012-12-12

Applicant: VMware, Inc.

Inventor： Raviprasad Mummidi

IPC: G06F17/30

CPC classification number: G06F17/30289 ,  G06F11/2038 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2201/815

Abstract: Embodiments include a checkpointing fault tolerance network architecture enables a first computer system to be remotely located from a second computer system. An intermediary computer system is situated between the first computer system and the second computer system to manage the transmission of checkpoint information from the first computer system to the second computer system in an efficient manner. The intermediary computer system responds to requests from the second computer system for updated data corresponding to memory pages selected by the second computer system, or memory pages identified through application of policy information defined by the second computer system.

Abstract translation: 实施例包括检查点容错网络架构使第一计算机系统能够远离第二计算机系统定位。 中间计算机系统位于第一计算机系统和第二计算机系统之间，以有效的方式管理从第一计算机系统到第二计算机系统的检查点信息的传输。 中间计算机系统对来自第二计算机系统的请求响应对应于由第二计算机系统选择的存储器页面的更新数据，或者通过应用由第二计算机系统定义的策略信息来识别的存储器页面。

公开(公告)号：US08898508B2

公开(公告)日：2014-11-25

申请号：US13670319

申请日：2012-11-06

Applicant: VMware, Inc.

Inventor： Raviprasad Mummidi

IPC: G06F11/00 ,  G06F11/20

CPC classification number: G06F11/2097 ,  G06F11/2038 ,  G06F2201/815

Abstract: A checkpointing fault tolerance network architecture enables a backup computer system to be remotely located from a primary computer system. An intermediary computer system is situated between the primary computer system and the backup computer system to manage the transmission of checkpoint information to the backup VM in an efficient manner. The intermediary computer system is networked to the primary VM through a first connection and is networked to the backup VM through a second connection. The intermediary computer system identifies updated data corresponding to memory pages that have been less frequently modified by the primary VM and transmits such updated data to the backup VM through the first connection. In such manner, the intermediary computer system holds back updated data corresponding to more frequently modified memory pages, since such memory pages may be more likely to be updated again in the future.

Abstract translation: 检查点容错网络架构使备份计算机系统能够远离主计算机系统。 中间计算机系统位于主计算机系统和备用计算机系统之间，以有效的方式管理检查点信息传输到备份虚拟机。 中间计算机系统通过第一连接与主虚拟机联网，并通过第二连接与备用虚拟机联网。 中间计算机系统识别与主VM不太频繁修改的存储器页对应的更新数据，并通过第一连接将这种更新的数据发送到备份VM。 以这种方式，中间计算机系统保持对应于更频繁修改的存储器页面的更新数据，因为这样的存储器页面将来可能再次被更新。

公开(公告)号：US09116829B2

公开(公告)日：2015-08-25

申请号：US14321174

申请日：2014-07-01

Applicant: VMware, Inc.

Inventor： Qasim Ali ,  Vivek Pandey ,  Raviprasad Mummidi ,  Kiran Tati

IPC: G06F12/10

CPC classification number: G06F12/1009 ,  G06F2212/151 ,  G06F2212/50 ,  G06F2212/651 ,  G06F2212/652

Abstract: The prioritization of large memory page mapping is a function of the access bits in the L1 page table. In a first phase of operation, the number of set access bits in each of the L1 page tables is counted periodically and a current count value is calculated therefrom. During the first phase, no pages are mapped large even if identified as such. After the first phase, the current count value is used to prioritize among potential large memory pages to determine which pages to map large. The system continues to calculate the current count value even after the first phase ends. When using hardware assist, the access bits in the nested page tables are used and when using software MMU, the access bits in the shadow page tables are used for large page prioritization.

Abstract translation: 大存储器页面映射的优先级是L1页表中的访问位的函数。 在第一操作阶段，周期性地对L1页表中的每一个中的设置访问比特数进行计数，并从其计算当前计数值。 在第一阶段，即使识别页面也不会映射大页面。 在第一阶段之后，当前的计数值用于在潜在的大内存页之间确定哪些页映射大。 即使在第一阶段结束之后，系统继续计算当前计数值。 当使用硬件辅助时，使用嵌套页表中的访问位，当使用软件MMU时，影子页表中的访问位用于大页面优先级。

公开(公告)号：US08898509B2

公开(公告)日：2014-11-25

申请号：US13712693

申请日：2012-12-12

Applicant: VMware, Inc.

Inventor： Raviprasad Mummidi

IPC: G06F11/00 ,  G06F17/30 ,  G06F11/20

CPC classification number: G06F17/30289 ,  G06F11/2038 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2201/815

Abstract: Embodiments include a checkpointing fault tolerance network architecture enables a first computer system to be remotely located from a second computer system. An intermediary computer system is situated between the first computer system and the second computer system to manage the transmission of checkpoint information from the first computer system to the second computer system in an efficient manner. The intermediary computer system responds to requests from the second computer system for updated data corresponding to memory pages selected by the second computer system, or memory pages identified through application of policy information defined by the second computer system.

Abstract translation: 实施例包括检查点容错网络架构使第一计算机系统能够远离第二计算机系统定位。 中间计算机系统位于第一计算机系统和第二计算机系统之间，以有效的方式管理从第一计算机系统到第二计算机系统的检查点信息的传输。 中间计算机系统对来自第二计算机系统的请求响应对应于由第二计算机系统选择的存储器页面的更新数据，或者通过应用由第二计算机系统定义的策略信息来识别的存储器页面。