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1. 发明申请

US20110167194A1 Method and System for Frequent Checkpointing 有权
公开(公告)号：US20110167194A1
公开(公告)日：2011-07-07
申请号：US12683273
申请日：2010-01-06
申请人： Daniel J. SCALES , Pratap SUBRAHMANYAM , Ganesh VENKITACHALAM , Michael NELSON
发明人： Daniel J. SCALES , Pratap SUBRAHMANYAM , Ganesh VENKITACHALAM , Michael NELSON
IPC分类号： G06F12/00
CPC分类号： G06F11/2023 , G06F11/1438 , G06F11/1484 , G06F11/2097 , G06F2201/84
摘要： 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.

2. 发明申请

US20110167196A1 Method and System for Frequent Checkpointing 有权
标题翻译：频繁检查点的方法和系统
公开(公告)号：US20110167196A1
公开(公告)日：2011-07-07
申请号：US12683288
申请日：2010-01-06
申请人： Daniel J. SCALES , Pratap SUBRAHMANYAM , Ganesh VENKITACHALAM , Michael NELSON
发明人： Daniel J. SCALES , Pratap SUBRAHMANYAM , Ganesh VENKITACHALAM , Michael NELSON
IPC分类号： G06F12/00 , G06F12/16
CPC分类号： G06F11/2023 , G06F11/1438 , G06F11/1484 , G06F11/2097 , G06F2201/84
摘要： 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.
摘要翻译：虚拟化平台通过将主虚拟机的检查点信息连续传送到诸如备份虚拟机的收集器进程来为主虚拟机提供容错。当在包含支持嵌套页表的多处理器的硬件平台上实现时，虚拟化平台利用嵌套页表支持来快速识别在检查点之间已经被修改的内存页。备份虚拟机提供反馈信息，以帮助虚拟化平台识别用于发送对存储器页的实际修改的候选存储器页，而不是作为检查点信息的一部分的整个存储器页。虚拟化平台还维护修改历史数据结构，以识别可以与主虚拟机的执行同时发送的存储器页面，而不是在主虚拟机被击晕时。

3. 发明申请

US20110167195A1 Method and System for Frequent Checkpointing 有权
公开(公告)号：US20110167195A1
公开(公告)日：2011-07-07
申请号：US12683278
申请日：2010-01-06
申请人： Daniel J. SCALES , Pratap SUBRAHMANYAM , Ganesh VENKITACHALAM , Michael NELSON
发明人： Daniel J. SCALES , Pratap SUBRAHMANYAM , Ganesh VENKITACHALAM , Michael NELSON
IPC分类号： G06F12/08 , G06F9/455
CPC分类号： G06F11/1407 , G06F9/45558 , G06F11/1484 , G06F11/2038 , G06F11/2048 , G06F11/2097 , G06F2009/45583
摘要： 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.

4. 发明申请

US20120284714A1 VIRTUAL MACHINE FAULT TOLERANCE 审中-公开
标题翻译：虚拟机故障容错
公开(公告)号：US20120284714A1
公开(公告)日：2012-11-08
申请号：US13471616
申请日：2012-05-15
申请人： Ganesh VENKITACHALAM , Rohit JAIN , Boris WEISSMAN , Daniel J. SCALES , Vyacheslav MALYUGIN , Jeffrey W. SHELDON , Min XU
发明人： Ganesh VENKITACHALAM , Rohit JAIN , Boris WEISSMAN , Daniel J. SCALES , Vyacheslav MALYUGIN , Jeffrey W. SHELDON , Min XU
IPC分类号： G06F9/455
CPC分类号： G06F11/1658 , G06F9/45533 , G06F9/45558 , G06F9/4881 , G06F11/0712 , G06F11/0766 , G06F11/079 , G06F2009/45579 , G06F2009/45591 , G06F2201/805 , G06F2201/815 , G06F2201/82
摘要： 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. The method includes enabling operations of the second VM to diverge from being in lockstep with operations with the first VM without resynchronizing the second VM with the first VM, if output of the second VM is not diverging from output of the first VM. The output of the second VM is compared with the output of the first VM to determine whether the output of the second VM has diverged from the output of the first VM. In response to a determination that the output of the second VM has diverged from the output of the first VM, a resynchronization of the second VM is executed.
摘要翻译：在运行虚拟化软件上的至少第一虚拟机（VM）和第二虚拟机的计算机系统中，用于所述第二虚拟机为所述第一虚拟机提供准锁步骤容错的计算机实现的方法。该方法包括如果第二VM的输出不与第一VM的输出分离，则第二VM的启用操作使得与第一VM的操作不同步，而不与第一VM重新同步第二VM。将第二VM的输出与第一VM的输出进行比较，以确定第二个VM的输出是否与第一个VM的输出分离。响应于确定第二VM的输出已经从第一VM的输出分离，执行第二VM的重新同步。

5. 发明申请

US20100318991A1 Virtual Machine Fault Tolerance 有权
标题翻译：虚拟机容错
公开(公告)号：US20100318991A1
公开(公告)日：2010-12-16
申请号：US12484640
申请日：2009-06-15
申请人： Ganesh VENKITACHALAM , Rohit JAIN , Boris WEISSMAN , Daniel J. SCALES , Vyacheslav MALYUGIN , Jeffrey W. SHELDON , Min XU
发明人： Ganesh VENKITACHALAM , Rohit JAIN , Boris WEISSMAN , Daniel J. SCALES , Vyacheslav MALYUGIN , Jeffrey W. SHELDON , Min XU
IPC分类号： G06F9/455
CPC分类号： G06F11/1658 , G06F9/45533 , G06F9/45558 , G06F9/4881 , G06F11/0712 , G06F11/0766 , G06F11/079 , G06F2009/45579 , G06F2009/45591 , G06F2201/805 , G06F2201/815 , G06F2201/82
摘要： In a computer system running a primary virtual machine (VM) on virtualization software on a primary virtualized computer system (VCS) and running a secondary VM on virtualization software on a secondary VCS, a method for the secondary VM to provide quasi-lockstep fault tolerance for the primary VM includes: as the primary VM is executing a workload, virtualization software in the primary VCS is: (a) causing predetermined events to be recorded in an event log, (b) keeping output associated with the predetermined events pending, and (c) sending the log entries to the virtualization software in the secondary VCS; as the secondary VM is replaying the workload, virtualization software in the secondary VCS is: (a) sending acknowledgements indicating that log entries have been received; (b) when the virtualization software encounters one of the predetermined events, searching the log entries to determine whether a log entry corresponding to the same event was received from the primary VCS, and if so, comparing data associated with the predetermined event produced by the secondary VM with that of the primary VM; if there is a match, the virtualization software in the secondary VCS transmitting an acknowledgement to the virtualization software in the primary VCS; one of the virtualization software in the primary or secondary VCS dropping the event and the other dispatching the output; and if there is no match, performing a checkpoint resynchronization.
摘要翻译：在主虚拟化计算机系统（VCS）上的虚拟化软件上运行主虚拟机（VM）并在辅助VCS上运行虚拟化软件上的辅助虚拟机的计算机系统中，辅助虚拟机提供准锁步骤容错对于主虚拟机包括：当主虚拟机正在执行工作负载时，主VCS中的虚拟化软件是：（a）使事件日志中记录预定事件，（b）保持与预定事件挂起的输出挂起，以及（c）将日志条目发送到二级VCS中的虚拟化软件; 当辅助虚拟机正在重播工作负载时，辅助VCS中的虚拟化软件是：（a）发送指示已经接收到日志条目的确认; （b）当虚拟化软件遇到预定事件之一时，搜索日志条目以确定是否从主VCS接收到与同一事件相对应的日志条目，如果是，则将与由该VCS生成的预定事件相关联的数据进行比较辅助虚拟机与主虚拟机的辅助虚拟机; 如果存在匹配，则次级VCS中的虚拟化软件向主VCS中的虚拟化软件发送确认; 主要或次要VCS中的虚拟化软件之一放弃事件，另一个调度输出; 如果没有匹配，则执行检查点重新同步。

6. 发明申请

US20120124305A1 METHOD AND SYSTEM FOR INTEGRATING DATABASE MEMORY MANAGEMENT IN VIRTUAL MACHINES 有权
标题翻译：用于在虚拟机中集成数据库存储管理的方法和系统
公开(公告)号：US20120124305A1
公开(公告)日：2012-05-17
申请号：US12946940
申请日：2010-11-16
申请人： Boris WEISSMAN , Aleksandr V. MIRGORODSKIY , Ganesh VENKITACHALAM , Feng TIAN
发明人： Boris WEISSMAN , Aleksandr V. MIRGORODSKIY , Ganesh VENKITACHALAM , Feng TIAN
IPC分类号： G06F12/02 , G06F12/12
CPC分类号： G06F12/0223 , G06F9/45533 , G06F12/0284 , G06F12/08 , G06F2009/45583 , G06F2212/151 , G06F2212/163 , G06F2212/657
摘要： Memory of a database management system (DBMS) that is running in a virtual machine is managed using techniques that integrate DBMS memory management with virtual machine memory management. Because of the integration, the effectiveness of DBMS memory management is preserved even though the physical memory allocated to the virtual machine may change during runtime as a result of varying memory demands of other applications, e.g., instances of other virtual machines, running on the same host computer as the virtual machine.
摘要翻译：使用将DBMS内存管理与虚拟机内存管理集成的技术来管理在虚拟机中运行的数据库管理系统（DBMS）的内存。由于集成，即使分配给虚拟机的物理内存可能在运行时间内由于其他应用程序的不同内存需求（例如，运行在其上的其他虚拟机的实例）的结果而改变，DBMS内存管理的有效性也将保持不变主机作为虚拟机。

7. 发明申请

US20120124270A1 RELIEVING MEMORY PRESSURE IN A HOST USING DATABASE MEMORY MANAGEMENT 有权
标题翻译：使用数据库内存管理消除主机中的内存压力
公开(公告)号：US20120124270A1
公开(公告)日：2012-05-17
申请号：US12946971
申请日：2010-11-16
申请人： Boris WEISSMAN , Aleksandr V. MIRGORODSKIY , Ganesh VENKITACHALAM , Feng TIAN
发明人： Boris WEISSMAN , Aleksandr V. MIRGORODSKIY , Ganesh VENKITACHALAM , Feng TIAN
IPC分类号： G06F12/08
CPC分类号： G06F9/45558 , G06F12/023 , G06F17/3048 , G06F2009/45583 , G06F2212/151 , G06F2212/163
摘要： Memory of a database management system (DBMS) that is running in a virtual machine is managed using techniques that integrate DBMS memory management with virtual machine memory management. Because of the integration, the effectiveness of DBMS memory management is preserved even though the physical memory allocated to the virtual machine may change during runtime as a result of varying memory demands of other applications, e.g., instances of other virtual machines, running on the same host computer as the virtual machine.
摘要翻译：使用将DBMS内存管理与虚拟机内存管理集成的技术来管理在虚拟机中运行的数据库管理系统（DBMS）的内存。由于集成，即使分配给虚拟机的物理内存可能在运行时间内由于其他应用程序的不同内存需求（例如，运行在其上的其他虚拟机的实例）的结果而改变，DBMS内存管理的有效性也将保持不变主机作为虚拟机。

8. 发明申请

US20100318762A1 Synchronizing A Translation Lookaside Buffer with Page Tables 有权
标题翻译：同步翻译后备缓冲区与页表
公开(公告)号：US20100318762A1
公开(公告)日：2010-12-16
申请号：US12485751
申请日：2009-06-16
申请人： Vyacheslav Vladimirovich MALYUGIN , Boris WEISSMAN , Ganesh VENKITACHALAM , Min XU
发明人： Vyacheslav Vladimirovich MALYUGIN , Boris WEISSMAN , Ganesh VENKITACHALAM , Min XU
IPC分类号： G06F12/10 , G06F12/00
CPC分类号： G06F12/1027 , G06F9/45558 , G06F12/0891 , G06F12/1009 , G06F12/1036 , G06F12/1045 , G06F12/109 , G06F2009/45583 , G06F2212/152 , G06F2212/305 , G06F2212/65 , G06F2212/683
摘要： 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.
摘要翻译：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。

9. 发明申请

US20100070678A1 Saving and Restoring State Information for Virtualized Computer Systems 审中-公开
标题翻译：保存和恢复虚拟化计算机系统的状态信息
公开(公告)号：US20100070678A1
公开(公告)日：2010-03-18
申请号：US12559484
申请日：2009-09-14
申请人： Irene ZHANG , Kenneth Charles BARR , Ganesh VENKITACHALAM , Irfan AHMAD , Alex GARTHWAITE , Jesse POOL
发明人： Irene ZHANG , Kenneth Charles BARR , Ganesh VENKITACHALAM , Irfan AHMAD , Alex GARTHWAITE , Jesse POOL
IPC分类号： G06F12/00 , G06F9/455
CPC分类号： G06F9/45558 , G06F9/461 , G06F9/485 , G06F9/5016 , G06F11/1438 , G06F12/08 , G06F2009/45575 , G06F2009/45583
摘要： Prior to or while the state of a virtual machine (“VM”) is being saved, such as in connection with the suspension or checkpointing of a VM, a set of one or more “active” memory pages is identified, this set of active memory pages comprising memory pages that are in use within the VM before operation of the VM is suspended. This set of active memory pages may constitute a “working set” of memory pages. To restore the state of the VM and resume operation, in some embodiments, (a) access to persistent storage is restored to the VM, device state for the VM is restored, and one or more of the set of active memory pages are loaded into physical memory; (b) operation of the VM is resumed; and (c) additional memory pages from the saved state of the VM are loaded into memory after operation of the VM has resumed.
摘要翻译：在保存虚拟机（“VM”）的状态之前，例如与VM的暂停或检查点相关联，识别一组或多个“活动”存储器页面的集合，该组活动在VM的操作之前暂停在VM内使用的存储器页面的存储器页面。这组活动内存页可能构成内存页的“工作集”。为了恢复VM的状态并恢复操作，在一些实施例中，（a）对VM的恢复到永久存储器的访问，恢复VM的设备状态，并将一组或多个活动存储器页面加载到物理内存; （b）恢复虚拟机的运作; 和（c）从VM的保存状态的附加存储器页面在VM的操作已经恢复之后被加载到存储器中。

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