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1. 发明授权

US08543781B2 Hybrid locking using network and on-disk based schemes 有权
公开(公告)号：US08543781B2
公开(公告)日：2013-09-24
申请号：US12565521
申请日：2009-09-23
申请人： Mayank Rawat , Jinyuan Li , Murali Vilayannur , Daniel J. Scales
发明人： Mayank Rawat , Jinyuan Li , Murali Vilayannur , Daniel J. Scales
IPC分类号： G06F12/14
CPC分类号： H04L41/00 , G06F17/30171
摘要： A method of acquiring a lock by a node, on a shared resource in a system of a plurality of interconnected nodes, is disclosed. Each node that competes for a lock on the shared resource maintains a list of locks currently owned by the node. A lock metadata is maintained on a shared storage that is accessible to all nodes that may compete for locks on shared resources. A heartbeat region is maintained on a shared resource corresponding to each node so nodes can register their liveness. A lock state is maintained in the lock metadata in the shared storage. A lock state may indicate lock held exclusively, lock free or lock in managed mode. If the lock is held in the managed mode, the ownership of the lock can be transferred to another node without a use of a mutual exclusion primitive such as the SCSI reservation.

2. 发明授权

US09459895B2 Virtual machine fault tolerance 有权
标题翻译：虚拟机容错
公开(公告)号：US09459895B2
公开(公告)日：2016-10-04
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 , G06F11/07
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。

3. 发明授权

US08775696B2 Storage area network access for virtual machines 有权
标题翻译：虚拟机的存储区域网络访问
公开(公告)号：US08775696B2
公开(公告)日：2014-07-08
申请号：US13429044
申请日：2012-03-23
申请人： Daniel J. Scales , Mallik Mahalingam
发明人： Daniel J. Scales , Mallik Mahalingam
IPC分类号： G06F3/00 , G06F9/455
CPC分类号： G06F9/455 , G06F9/45558 , H04L67/1097
摘要： Techniques for enabling a virtual machine (VM) executing on a physical node to access a partition of a storage system are described. One embodiment associates an identifier with the VM for use when communicating with the storage system, wherein the identifier differs from a default identifier of a host bust adapter (HBA) usable by the physical node to communicate with the storage system.
摘要翻译：描述用于使在物理节点上执行的虚拟机（VM）访问存储系统的分区的技术。一个实施例将标识符与VM进行关联以在与存储系统通信时使用，其中标识符与物理节点可用以与存储系统通信的主机胸围适配器（HBA）的默认标识符不同。

4. 发明授权

US08397038B2 Initializing file data blocks 有权
标题翻译：初始化文件数据块
公开(公告)号：US08397038B2
公开(公告)日：2013-03-12
申请号：US12050805
申请日：2008-03-18
申请人： Daniel J. Scales , Satyam B. Vaghani
发明人： Daniel J. Scales , Satyam B. Vaghani
IPC分类号： G06F12/00
CPC分类号： G06F17/3007 , G06F3/0608 , G06F3/0643 , G06F3/0676
摘要： A method and system is provided for initializing files such as, for example and without limitation, pre-allocated files or raw device mapping (RDM) files, by delaying initializing file blocks. In accordance with one or more embodiments of the present invention, file blocks are associated with corresponding indicators to track un-initialized blocks.
摘要翻译：提供了一种方法和系统，用于通过延迟初始化文件块来初始化诸如例如但不限于预先分配的文件或原始设备映射（RDM）文件的文件。根据本发明的一个或多个实施例，文件块与相应的指示符相关联以跟踪未初始化的块。

5. 发明授权

US07783779B1 Storage multipath management in a virtual computer system 有权
标题翻译：在虚拟计算机系统中进行存储多路径管理
公开(公告)号：US07783779B1
公开(公告)日：2010-08-24
申请号：US10665779
申请日：2003-09-19
申请人： Daniel J. Scales , Thorbioern Donbaek Jensen
发明人： Daniel J. Scales , Thorbioern Donbaek Jensen
IPC分类号： G06F15/173
CPC分类号： G06F9/5077
摘要： A virtual computer system, including one or more virtual machines (VMs), is connected to a redundant data storage system having multiple paths for routing data between the computer system and the data storage system. The VMs are supported by a kernel, which includes a resource manager for allocating system resources among the VMs, including data storage space and data storage bandwidth. A storage path manager (SPM) is integrated into the kernel for routing data between the computer system and the data storage system, including providing functions such as failovers and failbacks, as well as load distribution. Integrating the SPM into the kernel improves the kernel's ability to manage the VMs and to provide SAN resources to the VMs. For example, the SPM may enhance the isolation between multiple VMs by routing their respective data over different data paths. Also, the SPM may improve the allocation of system resources by coordinating with the resource manager.
摘要翻译：包括一个或多个虚拟机（VM）的虚拟计算机系统连接到具有用于在计算机系统和数据存储系统之间路由数据的多个路径的冗余数据存储系统。内核支持虚拟机，其中包括用于在VM之间分配系统资源的资源管理器，包括数据存储空间和数据存储带宽。存储路径管理器（SPM）集成到内核中，用于在计算机系统和数据存储系统之间路由数据，包括提供诸如故障转移和故障恢复等功能以及负载分配。将SPM集成到内核中可以改善内核管理虚拟机的能力，并为虚拟机提供SAN资源。例如，SPM可以通过在不同数据路径上路由它们各自的数据来增强多个VM之间的隔离。此外，SPM可以通过与资源管理器协调来改进系统资源的分配。

6. 发明授权

US07185327B2 System and method for optimizing operations via dataflow analysis 失效
标题翻译：通过数据流分析优化操作的系统和方法
公开(公告)号：US07185327B2
公开(公告)日：2007-02-27
申请号：US09757764
申请日：2001-01-09
申请人： Daniel J. Scales
发明人： Daniel J. Scales
IPC分类号： G06F9/45
CPC分类号： G06F8/443
摘要： A method for modifying serial dependencies in a procedure includes a step of building a graph representation of the procedure. The graph representation has an origin as well as a unique position, relative to the origin, for each memory operation in the procedure. Each memory operation in the representation is designated with a location type. Each of these location types are based on one or more characteristics of the corresponding memory operation that are sufficient to notify the compiler that the memory operation accesses a distinct or disjoint memory location. Memory operations having the same location type as subsequent memory operations are identified. When the graph representation does not include additional memory operations of the same location type between pairs of such memory operations, the subsequent memory operation is moved to a position in the intermediate representation that is closer to the origin.
摘要翻译：在过程中修改串行依赖性的方法包括构建过程的图表示的步骤。对于程序中的每个存储器操作，图形表示具有相对于原点的原点以及唯一的位置。表示中的每个存储器操作都用位置类型指定。这些位置类型中的每一个基于对应的存储器操作的一个或多个特性，足以通知编译器存储器操作访问不同或不相交的存储器位置。识别与后续存储器操作具有相同位置类型的存储器操作。当图形表示不包括这种存储器操作对之间相同位置类型的附加存储器操作时，随后的存储器操作被移动到更接近原点的中间表示中的位置。

7. 发明授权

US07155558B1 Providing access to a raw data storage unit in a computer system 有权
标题翻译：提供对计算机系统中原始数据存储单元的访问
公开(公告)号：US07155558B1
公开(公告)日：2006-12-26
申请号：US10897050
申请日：2004-07-21
申请人： Satyam B. Vaghani , Daniel J. Scales
发明人： Satyam B. Vaghani , Daniel J. Scales
IPC分类号： G06F12/00
CPC分类号： G06F3/0643 , G06F3/0607 , G06F3/0622 , G06F3/0667 , G06F3/067
摘要： A computer has access to a system-formatted data storage unit (DSU) containing a file system and to a raw DSU. A file within the file system constitutes a raw DSU mapping that facilitates access to the raw DSU. The raw DSU mapping appears to be an ordinary file to a storage user, but with the size of the raw DSU. An attempted access to the raw DSU mapping is translated into a corresponding access to the raw DSU. Access to the raw DSU by the storage user may be restricted to a specified region of the raw DSU, by defining an extent within the raw DSU mapping. The raw DSU mapping provides access to the raw DSU with many of the advantages of using a file system, including name persistency, permissions, persistent attributes, locking information for a distributed file system and other extended metadata.
摘要翻译：计算机可以访问包含文件系统和原始DSU的系统格式的数据存储单元（DSU）。文件系统内的一个文件构成一个原始DSU映射，便于访问原始的DSU。原始DSU映射似乎是存储用户的普通文件，但具有原始DSU的大小。对原始DSU映射的尝试访问被转换为对原始DSU的相应访问。存储用户对原始DSU的访问可以通过定义原始DSU映射中的范围来限制到原始DSU的指定区域。原始DSU映射提供对原始DSU的访问，具有使用文件系统的许多优点，包括名称持久性，权限，持久属性，分布式文件系统的锁定信息和其他扩展元数据。

8. 发明授权

US06412056B1 Extended translation lookaside buffer with fine-grain state bits 失效
标题翻译：具有细粒状态位的扩展翻译后备缓冲区
公开(公告)号：US06412056B1
公开(公告)日：2002-06-25
申请号：US08942337
申请日：1997-10-01
申请人： Kourosh Gharachorloo , Daniel J. Scales
发明人： Kourosh Gharachorloo , Daniel J. Scales
IPC分类号： G06F1210
CPC分类号： G06F12/0826 , G06F12/1027 , G06F2212/652
摘要： A software distributed shared memory system includes a translation lookaside buffer extended to include fine-grain memory block-state bits associated with each block of information within a page stored in memory. The block-state bits provide multiple block states for each block. The block-state bits are used to check the state of each block, thereby alleviating the need for software checks and reducing checking overheads associated therewith.
摘要翻译：软件分布式共享存储器系统包括翻译后备缓冲器，扩展为包括与存储在存储器中的页面内的每个信息块相关联的细粒度存储器块状态位。块状态位为每个块提供多个块状态。块状态位用于检查每个块的状态，从而减轻对软件检查的需要并减少与其相关联的检查开销。

9. 发明授权

US06240500B1 Method for dynamically placing procedures of a program in a memory 失效
标题翻译：将程序的程序动态放置在存储器中的方法
公开(公告)号：US06240500B1
公开(公告)日：2001-05-29
申请号：US09093223
申请日：1998-06-08
申请人： Daniel J. Scales
发明人： Daniel J. Scales
IPC分类号： G06F1200
CPC分类号： G06F9/5016 , G06F9/24 , G06F9/44521 , G06F9/44557
摘要： A method places procedures of an application program in a memory in order to maximize performance. The application program is first mapped to non-executable addresses of the memory. A segment of the memory large enough to store the program is allocated as executable. The procedures are then copied from the mapped non-executable addresses to the executable segment as the procedures are executed. The procedures are copied in the order that they are executed.
摘要翻译：一种方法将应用程序的过程放在内存中，以便最大限度地提高性能。应用程序首先映射到内存的不可执行地址。分配足够大的存储程序的存储器段可执行。随着程序的执行，程序将从映射的不可执行地址复制到可执行段。程序按照执行的顺序进行复制。

10. 发明授权

US08549241B2 Method and system for frequent checkpointing 有权
公开(公告)号：US08549241B2
公开(公告)日：2013-10-01
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： G06F12/16
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.

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