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公开(公告)号：US11307765B2
公开(公告)日：2022-04-19
申请号：US16356818
申请日：2019-03-18
Applicant: VMware, Inc.
Inventor： R. Hugo Patterson, III , Sazzala Reddy , Vijayan Prabhakaran , Garrett Smith , Lakshmi Narayanan Bairavasundaram , Ganesh Venkitachalam
IPC: G06F3/06 , G06F16/28 , G06F16/23 , G06F16/2455 , G06F16/22
Abstract: Data in a storage system is deduplicated after receiving from at least one writing entity requests for a plurality of write operations for a corresponding plurality of data blocks in a storage object. The received blocks are buffered and sorted in order and a sequence of clumps is created from the buffered blocks, where each clump comprises a grouping of at least one of the sorted, buffered blocks. A boundary is determined between at least one pair of clumps based at least in part on the content of at least one of the buffered blocks, and it is then determined whether at least one of the clumps is a duplicate of a previously stored clump.
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2.发明申请公开(公告)号：US20160253201A1
公开(公告)日：2016-09-01
申请号：US15148890
申请日：2016-05-06
Applicant: VMware, Inc.
Inventor： Irene Zhang , Kenneth Charles Barr , Ganesh Venkitachalam , Irfan Ahmad , Alex Garthwaite , Jesse Pool
IPC: G06F9/455
CPC classification number: G06F9/45558 , G06F9/461 , G06F9/485 , G06F9/5016 , G06F11/1438 , G06F12/08 , G06F2009/45575 , G06F2009/45583
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20230161676A1
公开(公告)日：2023-05-25
申请号：US17992836
申请日：2022-11-22
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
CPC classification number: G06F11/1658 , G06F11/0766 , G06F11/079 , G06F11/0712 , G06F9/45533 , G06F9/45558 , G06F9/4881 , G06F2009/45579 , G06F2009/45591 , G06F2201/805 , G06F2201/815 , G06F2201/82
Abstract: System and method for providing fault tolerance in virtualized computer systems use a first guest and a second guest running on virtualization software to produce outputs, which are produced when a workload is executed on the first and second guests. An output of the second guest is compared with an output of the first guest to determine if there is an output match. If there is no output match, the first guest is paused and a resynchronization of the second guest is executed to restore a checkpointed state of the first guest on the second guest. After the resynchronization of the second guest, the paused first guest is caused to resume operation.
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公开(公告)号：US10579485B2
公开(公告)日：2020-03-03
申请号：US15284465
申请日：2016-10-03
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
Abstract: In a computer system running at least a first virtual machine (VM) and a second VM on virtualization software, a computer implemented method for the second VM to provide quasi-lockstep fault tolerance for the first VM includes executing a workload on the first VM and the second VM that involves producing at least one externally visible output and comparing an externally visible output of the second VM with an externally visible output of the first VM to determine if there is an output match. In response to a determination that the externally visible output of the second VM does not match the externally visible output of the first VM, a resynchronization of the second VM is executed. The externally visible output of the first VM is kept from being output externally until completion of the resynchronization.
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公开(公告)号：US09489265B2
公开(公告)日：2016-11-08
申请号：US14170016
申请日：2014-01-31
Applicant: VMware, Inc.
Inventor： Daniel J. Scales , Pratap Subrahmanyam , Ganesh Venkitachalam , Michael Nelson
CPC classification number: G06F11/1407 , G06F9/45558 , G06F11/1484 , G06F11/2038 , G06F11/2048 , G06F11/2097 , G06F2009/45583
Abstract: A virtualization platform provides fault tolerance for a primary virtual machine by continuously transmitting checkpoint information of the primary virtual machine to a collector process, such as a backup virtual machine. When implemented on a hardware platform comprising a multi-processor that supports nested page tables, the virtualization platform leverages the nested page table support to quickly identify memory pages that have been modified between checkpoints. The backup virtual machine provides feedback information to assist the virtualization platform in identifying candidate memory pages for transmitting actual modifications to the memory pages rather than the entire memory page as part of the checkpoint information. The virtualization platform further maintains a modification history data structure to identify memory pages that can be transmitted simultaneous with the execution of the primary virtual machine rather than while the primary virtual machine has been stunned.
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Patent Agency Ranking
公开(公告)号：US10394560B2
公开(公告)日：2019-08-27
申请号：US15256489
申请日：2016-09-02
Applicant: VMware, Inc.
Inventor： Vyacheslav V. Malyugin , Min Xu , Boris Weissman , Ganesh Venkitachalam , Alexander Klaiber
Abstract: The output of a non-deterministic instruction is handled during record and replay in a virtual machine. An output of a non-deterministic instruction is stored to a buffer during record mode and retrieved from a buffer during replay mode without exiting to the hypervisor. At least part of the contents of the buffer can be stored to a log when the buffer is full during record mode, and the buffer can be replenished from a log when the buffer is empty during replay mode.
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公开(公告)号：US09928180B2
公开(公告)日：2018-03-27
申请号：US15437369
申请日：2017-02-20
Applicant: VMware, Inc.
Inventor： Vyacheslav Vladimirovich Malyugin , Boris Weissman , Ganesh Venkitachalam , Min Xu
IPC: G06F12/00 , G06F13/00 , G06F13/28 , G06F12/1027 , G06F9/455 , G06F12/0891 , G06F12/1045 , G06F12/1009
CPC classification number: G06F12/1027 , G06F9/45558 , G06F12/0891 , G06F12/1009 , G06F12/1036 , G06F12/1045 , G06F12/109 , G06F2009/45583 , G06F2212/152 , G06F2212/305 , G06F2212/65 , G06F2212/683
Abstract: The translation lookaside buffer (TLB) of a processor is kept in synchronization with a guest page table by use of an indicator referred to as a “T” bit. The T bit of the NPT/EPT entries mapping the guest page table are set when a page walk is performed on the NPT/EPT. When modifications are made to pages mapped by NPT/EPT entries with their T bit set, changes to the TLB are made so that the TLB remains in synchronization with the guest page table. Accordingly, record/replay of virtual machines of virtualized computer systems may be performed reliably with no non-determinism introduced by stale TLBs that fall out of synchronization with the guest page table.
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公开(公告)号：US09575899B2
公开(公告)日：2017-02-21
申请号：US14954346
申请日：2015-11-30
Applicant: VMware, Inc.
Inventor： Vyacheslav Vladimirovich Malyugin , Boris Weissman , Ganesh Venkitachalam , Min Xu
CPC classification number: G06F12/1027 , G06F9/45558 , G06F12/0891 , G06F12/1009 , G06F12/1036 , G06F12/1045 , G06F12/109 , G06F2009/45583 , G06F2212/152 , G06F2212/305 , G06F2212/65 , G06F2212/683
Abstract: The translation lookaside buffer (TLB) of a processor is kept in synchronization with a guest page table by use of an indicator referred to as a “T” bit. The T bit of the NPT/EPT entries mapping the guest page table are set when a page walk is performed on the NPT/EPT. When modifications are made to pages mapped by NPT/EPT entries with their T bit set, changes to the TLB are made so that the TLB remains in synchronization with the guest page table. Accordingly, record/replay of virtual machines of virtualized computer systems may be performed reliably with no non-determinism introduced by stale TLBs that fall out of synchronization with the guest page table.
Abstract translation: 处理器的翻译后备缓冲器（TLB）通过使用称为“T”位的指示符与访客页表保持同步。 在NPT / EPT上执行页面移动时，设置映射访客页表的NPT / EPT条目的T位。 当对具有T位置位的NPT / EPT条目映射的页面进行修改时，进行TLB的更改，使得TLB与访客页表保持同步。 因此，可以可靠地执行虚拟化计算机系统的虚拟机的记录/重放，而不会由与访客页表不同步的失效TLB引入非确定性。
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公开(公告)号：US11507477B2
公开(公告)日：2022-11-22
申请号：US16801096
申请日：2020-02-25
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
Abstract: System and method for providing fault tolerance in virtualized computer systems use a first guest and a second guest running on virtualization software to produce outputs, which are produced when a workload is executed on the first and second guests. An output of the second guest is compared with an output of the first guest to determine if there is an output match. If there is no output match, the first guest is paused and a resynchronization of the second guest is executed to restore a checkpointed state of the first guest on the second guest. After the resynchronization of the second guest, the paused first guest is caused to resume operation.
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公开(公告)号：US20170024291A1
公开(公告)日：2017-01-26
申请号：US15284465
申请日：2016-10-03
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
CPC classification number: G06F11/1658 , G06F9/45533 , G06F9/45558 , G06F9/4881 , G06F11/0712 , G06F11/0766 , G06F11/079 , G06F2009/45579 , G06F2009/45591 , G06F2201/805 , G06F2201/815 , G06F2201/82
Abstract: In a computer system running at least a first virtual machine (VM) and a second VM on virtualization software, a computer implemented method for the second VM to provide quasi-lockstep fault tolerance for the first VM includes executing a workload on the first VM and the second VM that involves producing at least one externally visible output and comparing an externally visible output of the second VM with an externally visible output of the first VM to determine if there is an output match. In response to a determination that the externally visible output of the second VM does not match the externally visible output of the first VM, a resynchronization of the second VM is executed. The externally visible output of the first VM is kept from being output externally until completion of the resynchronization.
Abstract translation: 在运行虚拟化软件上的至少第一虚拟机（VM）和第二VM的计算机系统中，用于第二VM为第一虚拟机提供准锁步骤容错的计算机实现方法包括执行第一虚拟机上的工作负载，以及 所述第二VM涉及产生至少一个外部可见的输出并将所述第二VM的外部可见的输出与所述第一VM的外部可见的输出进行比较，以确定是否存在输出匹配。 响应于确定第二VM的外部可见输出与第一VM的外部可见的输出不匹配，则执行第二VM的重新同步。 第一个VM的外部可见的输出保持不被外部输出，直到重新同步完成。
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