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    Optimizing lock acquisition on transaction logs
    1.
    发明授权
    Optimizing lock acquisition on transaction logs 有权
    优化事务日志上的锁获取

    公开(公告)号：US07899794B2

    公开(公告)日：2011-03-01

    申请号：US12052417

    申请日：2008-03-20

    申请人： Vadiraja Bhatt ,  Nitin Verma ,  Fei Zhou

    发明人： Vadiraja Bhatt ,  Nitin Verma ,  Fei Zhou

    IPC分类号： G06F17/00

    CPC分类号： G06F17/30362 ,  G06F9/526 ,  G06F17/30368

    摘要： A system, method, and computer program product for improving physical lock acquisition for database transaction logs are described herein. In an embodiment, the method operates by receiving a request for a transaction log page and determining whether a requested log page is newly-allocated or already exists. A determination is made regarding whether the last log page is being modified. A physical lock is taken on the requested log page when it has been determined that the requested log page is not newly-allocated and that the last log page is not being modified. Operations on the last log page are synchronized without a physical lock when it is determined that the requested log page is newly-allocated or that the last log page is being modified.

    摘要翻译： 本文描述了用于改进数据库事务日志的物理锁获取的系统，方法和计算机程序产品。 在一个实施例中，该方法通过接收对事务日志页面的请求并确定所请求的日志页面是新被分配还是已经存在来操作。 确定最后一个日志页面是否被修改。 当确定所请求的日志页面不被新分配并且最后一个日志页面未被修改时，将在所请求的日志页面上执行物理锁定。 当确定所请求的日志页面被新分配或者最后一个日志页面被修改时，上一个日志页面上的操作被同步而没有物理锁定。

    Optimizing Lock Acquisition on Transaction Logs
    2.
    发明申请
    Optimizing Lock Acquisition on Transaction Logs 有权
    优化事务日志中的锁获取

    公开(公告)号：US20090240739A1

    公开(公告)日：2009-09-24

    申请号：US12052417

    申请日：2008-03-20

    申请人： Vadiraja Bhatt ,  Nitin Verma ,  Fei Zhou

    发明人： Vadiraja Bhatt ,  Nitin Verma ,  Fei Zhou

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30362 ,  G06F9/526 ,  G06F17/30368

    摘要： A system, method, and computer program product for improving physical lock acquisition for database transaction logs are described herein. In an embodiment, the method operates by receiving a request for a transaction log page and determining whether a requested log page is newly-allocated or already exists. A determination is made regarding whether the last log page is being modified. A physical lock is taken on the requested log page when it has been determined that the requested log page is not newly-allocated and that the last log page is not being modified. Operations on the last log page are synchronized without a physical lock when it is determined that the requested log page is newly-allocated or that the last log page is being modified.

    摘要翻译： 本文描述了用于改进数据库事务日志的物理锁获取的系统，方法和计算机程序产品。 在一个实施例中，该方法通过接收对事务日志页面的请求并确定所请求的日志页面是新被分配还是已经存在来操作。 确定最后一个日志页面是否被修改。 当确定所请求的日志页面不被新分配并且最后一个日志页面未被修改时，将在所请求的日志页面上执行物理锁定。 当确定所请求的日志页面被新分配或者最后一个日志页面被修改时，上一个日志页面上的操作被同步而没有物理锁定。

    Reduce log contention by batching log record transfers to the log
    3.
    发明授权
    Reduce log contention by batching log record transfers to the log 有权

    公开(公告)号：US10817500B2

    公开(公告)日：2020-10-27

    申请号：US14208958

    申请日：2014-03-13

    申请人： Fei Zhou ,  Sarika Iyer ,  Graham Ivey

    发明人： Fei Zhou ,  Sarika Iyer ,  Graham Ivey

    IPC分类号： G06F16/23 ,  G06F16/21 ,  G06F16/2455 ,  G06F16/24

    摘要： A system for managing database logging, the comprises a processor; and a user task executing in a database server process and executable by the processor, the user task to: receive in a database management system on a database server, a command to manipulate a portion of a database managed by the database management system; obtain a lock on the portion of the database; create a first log record in a first private log cache associated with the user task, the first log record recording a data manipulation to the portion of the database; enqueue the first log record to a queue; and release the lock on the portion of the database after copying the first log record to the queue.

    Method and apparatus for power supply control and electronic device
    4.
    发明授权
    Method and apparatus for power supply control and electronic device 有权
    电源控制和电子设备的方法和装置

    公开(公告)号：US09362769B2

    公开(公告)日：2016-06-07

    申请号：US14118987

    申请日：2012-05-23

    申请人： Fei Zhou ,  Yinsi Yang ,  Bo Liu ,  Zhenxin Xi

    发明人： Fei Zhou ,  Yinsi Yang ,  Bo Liu ,  Zhenxin Xi

    IPC分类号： H02J7/00 ,  H01M10/44 ,  G06F1/26

    CPC分类号： H02J7/0054 ,  G06F1/266 ,  H01M10/44 ,  H02J7/0036 ,  H02J7/0052 ,  H02J2007/0062

    摘要： The present invention provides a method and an apparatus for power supply control as well as an electronic device. The method comprises: detecting that the first device is connected with the second device via the first physical interface, when the first device is in the unconnected state; determining whether the connection between the first and second devices satisfies a first predetermined condition or not, so as to obtain a first determination result; switching the first device from the unconnected state to the first connected state when the first determination result indicates that the connection satisfies the first predetermined condition; obtaining power supply requirement information of the second device that indicates whether the first device is required to supply power to the second device or not; and controlling the power supply to the second device via the first physical interface based on the power supply requirement information.

    摘要翻译： 本发明提供一种用于电源控制的方法和装置以及电子装置。 该方法包括：当第一设备处于非连接状态时，检测第一设备经由第一物理接口与第二设备连接; 确定第一和第二装置之间的连接是否满足第一预定条件，以便获得第一确定结果; 当所述第一确定结果指示所述连接满足所述第一预定条件时，将所述第一设备从所述未连接状态切换到所述第一连接状态; 获取指示所述第二设备的电源需求信息是否需要向所述第二设备供电; 以及基于所述电源需求信息经由所述第一物理接口控制到所述第二设备的电力供应。

    Oxazolidinones as antibacterial agents
    6.
    发明授权
    Oxazolidinones as antibacterial agents 失效
    恶唑烷酮作为抗菌剂

    公开(公告)号：US07498350B2

    公开(公告)日：2009-03-03

    申请号：US10536687

    申请日：2003-11-24

    申请人： Michael Barry Gravestock ,  Neil James Hales ,  Folkert Reck ,  Fei Zhou

    发明人： Michael Barry Gravestock ,  Neil James Hales ,  Folkert Reck ,  Fei Zhou

    IPC分类号： A61K31/44 ,  C07D413/00

    CPC分类号： C07D413/14

    摘要： A compound of the formula (I), or a pharmaceutically-acceptable salt, or in-vivo hydrolysable ester thereof: Wherein C is selected from (D) and (E), R2a, R6a, and R3a are independently selected from for example H, CF3, Me and Et; R2b and R6b are independently selected from for example H, F, CF3, Me and Et; R1b is for example optionally substituted diazolyl, triazolyl or tetrazolyl; R4 is for example an optionally substituted 5- or 6-membered heterocyclic ring system. Methods for making compounds of the formula (I), compositions containing them and their use as antibacterial agents are also described.

    摘要翻译： 式（I）化合物或其药学上可接受的盐或其体内可水解的酯：其中C选自（D）和（E），R 2a，R 6a和R 3a独立地选自例如H ，CF3，Me和Et; R2b和R6b独立地选自H，F，CF3，Me和Et; R 1b是例如任选取代的二唑基，三唑基或四唑基; R4是例如任选取代的5元或6元杂环系。 还描述了制备式（I）化合物，含有它们的组合物及其作为抗菌剂的用途的方法。

    Distributed database system providing data and space management methodology
    10.
    发明授权
    Distributed database system providing data and space management methodology 有权
    分布式数据库系统提供数据和空间管理方法

    公开(公告)号：US09152666B2

    公开(公告)日：2015-10-06

    申请号：US12055194

    申请日：2008-03-25

    申请人： Mei-Lin Linda Lin ,  Fei Zhou ,  Joe Francis ,  Srikanth Sampath ,  Satya N. Ramachandran ,  Gangavara Prasad Varakur

    发明人： Mei-Lin Linda Lin ,  Fei Zhou ,  Joe Francis ,  Srikanth Sampath ,  Satya N. Ramachandran ,  Gangavara Prasad Varakur

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30362 ,  Y10S707/99938

    摘要： A distributed database system providing data and space management methodology. In one embodiment a system for allocating resources amongst a plurality of database servers sharing resources comprises: an input module for receiving user input for allocating resources shared amongst a plurality of database servers and establishing thresholds for utilization of resources at each database server; a monitoring module at each database server for monitoring local resource utilization at each database server and sending a request for balancing resources to a second database server when local resource utilization reaches an established threshold at a first database server; and a load balancing module for receiving the request for balancing resources and determining whether to adjust resources allocated to the first database server and the second database server in response to the request.

    摘要翻译： 提供数据和空间管理方法的分布式数据库系统。 在一个实施例中，用于在共享资源的多个数据库服务器之间分配资源的系统包括：输入模块，用于接收用于分配在多个数据库服务器之间共享的资源的用户输入，并为每个数据库服务器处的资源建立阈值; 每个数据库服务器处的监视模块，用于在本地资源利用率达到第一数据库服务器上建立的阈值时监视每个数据库服务器的本地资源利用率，并发送平衡资源到第二数据库服务器的请求; 以及负载平衡模块，用于接收所述用于平衡资源的请求，并且响应于所述请求确定是否调整分配给所述第一数据库服务器和所述第二数据库服务器的资源。