公开(公告)号：US06401127B1

公开(公告)日：2002-06-04

申请号：US09304395

申请日：1999-05-04

申请人： Alan Lei ,  Nitin Karkhanis ,  Richard Livingston ,  Uwe Sellentin

发明人： Alan Lei ,  Nitin Karkhanis ,  Richard Livingston ,  Uwe Sellentin

IPC分类号： G06F1300

CPC分类号： H04L1/188 ,  H04L1/0018 ,  H04L1/1825 ,  H04L45/00 ,  H04L45/26 ,  H04L69/324

摘要： A method for computing an ACK timing interval for an ACK timer in a protocol layer LLC type 2 session first measures a time interval between transmission of a frame by a source computer joined to a to a destination computer by an intermediate link, and receipt of a corresponding acknowledgment frame by the source computer from the destination computer. The two events at the source computer, starting a timer upon commencement of transmission of a frame or sequence of frames and the later reception of an acknowledge message indicating receipt of those frames, permits calculation of a measured time interval. The measured time interval is used to compute the bandwidth of the intermediate link. The required ACK timing interval for the ACK timer is then computed in response to the bandwidth, the number of bytes transmitted after starting the ACK timer, and the return time for an acknowledgment message. The ACK timing interval may be recomputed after every transmission of frames and receipt of a corresponding ACK message. The ACK timing interval is thereby dynamically adjusted to conditions on the intermediate link, including natural bandwidth for either a slow or fast link, congestion due to other traffic on the link, etc. The dynamic adjustment of the ACK timing interval prevents inadvertent timeouts of the ACK timer, and so prevents inadvertent breaking of the LLC type 2 reliable transport connection.

摘要翻译： 用于计算协议层LLC类型2会话中的ACK定时器的ACK定时间隔的方法首先测量由中间链路连接到目的地计算机的源计算机发送帧之间的时间间隔，以及接收到 来自目的地计算机的源计算机的相应确认帧。 在源计算机上的两个事件，在帧或帧序列的传输开始时启动定时器以及稍后接收到指示接收到这些帧的确认消息，允许计算测量的时间间隔。 测量的时间间隔用于计算中间链路的带宽。 然后响应于带宽，启动ACK定时器之后发送的字节数以及确认消息的返回时间来计算ACK定时器所需的ACK定时间隔。 可以在每次传输帧和接收到相应的ACK消息之后重新计算ACK定时间隔。 因此，ACK定时间隔被动态地调整到中间链路上的条件，包括慢链路或快速链路的自然带宽，由于链路上的其他业务造成的拥塞等.AH定时间隔的动态调整防止了无意中超时 ACK定时器，因此防止了LLC 2型可靠传输连接的无意中断。

公开(公告)号：US06556574B1

公开(公告)日：2003-04-29

申请号：US09283124

申请日：1999-03-31

申请人： Bernie Paul Pearce ,  Nitin Karkhanis ,  Richard Livingston

发明人： Bernie Paul Pearce ,  Nitin Karkhanis ,  Richard Livingston

IPC分类号： H04L1256

CPC分类号： H04L45/26 ,  H04L1/16 ,  H04L12/462 ,  H04L45/34

摘要： A router transmits an ARP Explorer request packet onto a subnetwork in order to learn the route (RIF information) from the router to an end station. The end station receives a plurality of ARP Explorer request packets from the router because of multiple paths in an SRB network, and the end station transmits an ARP Explorer response packet in response to each ARP Explorer request packet received. The invention adopts the path of the first ARP Explorer response packet received by the router from the end station for the RIF information from the router to the end station, and uses a “duplicate ignore” timer in order to avoid freezing this route into the router tables. The timer begins running upon receipt of the first ARP Explorer response packet, and expires after an “update time interval”. No further ARP Explorer response packet is processed until after expiration of the update time interval.

摘要翻译： 路由器将ARP Explorer请求包发送到子网，以便学习从路由器到终端站的路由（RIF信息）。 终端站由于SRB网络中的多个路径而从路由器接收到多个ARP Explorer请求分组，并且终端站响应于接收到的每个ARP Explorer请求分组而发送ARP Explorer响应分组。 本发明采用路由器从终端接收到的第一个ARP Explorer响应报文，从路由器到终端的RIF信息，并使用“重复忽略”定时器，以避免将该路由冻结到路由器 表。 定时器在收到第一个ARP Explorer响应数据包后开始运行，并在“更新时间间隔”后过期。 在更新时间间隔到期之前，不再处理进一步的ARP Explorer响应数据包。

公开(公告)号：US20130282666A1

公开(公告)日：2013-10-24

申请号：US13454799

申请日：2012-04-24

申请人： Steven McGee ,  Jiangbin Luo ,  Benedicto Garin ,  Mahesh Girkar ,  Michael Harvey ,  Nitin Karkhanis ,  Steve Lee ,  Juan Loaiza ,  Robert McGuirk ,  Hongjie Yang

发明人： Steven McGee ,  Jiangbin Luo ,  Benedicto Garin ,  Mahesh Girkar ,  Michael Harvey ,  Nitin Karkhanis ,  Steve Lee ,  Juan Loaiza ,  Robert McGuirk ,  Hongjie Yang

IPC分类号： G06F17/30

CPC分类号： G06F17/30581

摘要： Disclosed are methods and apparatuses to provide a redo repeater that allows for no data loss protection without the performance impact to the primary database even when a significant geographical distance separates the primary and standby databases. The Repeater is a lightweight entity that receives redo from the primary database with the purpose of redistributing that redo throughout the primary/standby system configuration. The Repeater able to extend no data loss protection and switchover functionality to terminal standby databases even though the primary database does not need to have a direct connection with those destinations.

摘要翻译： 公开了提供重做中继器的方法和装置，即使当主要和备用数据库的重要地理距离分离时，也不允许没有对主数据库的性能影响的数据丢失保护。 Repeater是一个轻量级的实体，从主数据库接收重做，目的是在整个主/备系统配置中重新分配重做。 即使主数据库不需要与这些目的地的直接连接，中继器也不会将数据丢失保护和切换功能扩展到终端备用数据库。

公开(公告)号：US20050050295A1

公开(公告)日：2005-03-03

申请号：US10962053

申请日：2004-10-08

申请人： Karen Noel ,  Nitin Karkhanis

发明人： Karen Noel ,  Nitin Karkhanis

IPC分类号： G06F12/08 ,  G06F12/10 ,  G06F12/12

CPC分类号： G06F12/126 ,  G06F12/08 ,  G06F12/1009 ,  G06F12/1036 ,  G06F12/109 ,  G06F2212/656

摘要： A method for use in a computer. A user of the computer stores a table of selections in a permanent memory structure of the computer, each selection indicating a memory object and one of at least two memory management policies for the memory object. The selections may select from one or more choices: e.g., whether pages of the memory object are to be reserved, or faulted on demand; whether pages of the memory object are to be locked into physical memory of the computer, or to be demand paged from a fluid page pool; whether pages allocated for the memory object are to be zeroed; whether the memory object is to be mapped using shared page tables; or specifying whether memory for the memory object is to be allocated contiguous physical pages of memory. A symbolic name is assigned to each of the memory objects. A non-privileged process issues a request designating one of the memory objects by symbolic name, and allocating memory from a reserved pool of memory for use in the object. The physical pages of the memory objects are managed, each according to the corresponding stored selection.

摘要翻译： 一种在计算机中使用的方法。 计算机的用户将选择表存储在计算机的永久存储器结构中，每个选择指示存储器对象以及用于存储器对象的至少两个存储器管理策略中的一个。 选择可以从一个或多个选择中进行选择：例如，是否要保留存储器对象的页面，或者根据需要进行故障; 存储器对象的页面是否被锁定到计算机的物理存储器中，或者是要从流体页面池中寻呼; 分配给存储器对象的页面是否被归零; 是否使用共享页表来映射内存对象; 或指定是否为内存对象的内存分配连续的物理页面的内存。 符号名称分配给每个内存对象。 非特权进程通过符号名称发出指定其中一个内存对象的请求，并从保留的存储池中分配内存以供对象使用。 管理存储器对象的物理页面，每个根据相应的存储选择。

公开(公告)号：US10102266B2

公开(公告)日：2018-10-16

申请号：US13454799

申请日：2012-04-24

申请人： Steven McGee ,  Jiangbin Luo ,  Benedicto Garin ,  Mahesh Girkar ,  Michael Harvey ,  Nitin Karkhanis ,  Steve Lee ,  Juan Loaiza ,  Robert McGuirk ,  Hongjie Yang

发明人： Steven McGee ,  Jiangbin Luo ,  Benedicto Garin ,  Mahesh Girkar ,  Michael Harvey ,  Nitin Karkhanis ,  Steve Lee ,  Juan Loaiza ,  Robert McGuirk ,  Hongjie Yang

IPC分类号： G06F17/30

摘要： Disclosed are methods and apparatuses to provide a redo repeater that allows for no data loss protection without the performance impact to the primary database even when a significant geographical distance separates the primary and standby databases. The Repeater is a lightweight entity that receives redo from the primary database with the purpose of redistributing that redo throughout the primary/standby system configuration. The Repeater able to extend no data loss protection and switchover functionality to terminal standby databases even though the primary database does not need to have a direct connection with those destinations.

公开(公告)号：US20080104358A1

公开(公告)日：2008-05-01

申请号：US11962990

申请日：2007-12-21

申请人： Karen Lee Noel ,  Nitin Karkhanis

发明人： Karen Lee Noel ,  Nitin Karkhanis

IPC分类号： G06F12/02 ,  G06F12/08

CPC分类号： G06F12/126 ,  G06F12/08 ,  G06F12/1009 ,  G06F12/1036 ,  G06F2212/656

摘要： A method manages memory of a computer where the physical memory of the computer includes one or more non-pageable pools. According to the method, one or more non-pageable pools of physical memory that are otherwise managed by a virtual memory are designated. The memory for one of the designated pools is then mapped in response to a request from a non-privileged program.

摘要翻译： 一种方法管理计算机的存储器，其中计算机的物理存储器包括一个或多个非可页面池。 根据该方法，指定由虚拟存储器另外管理的一个或多个不可访问的物理存储器池。 然后，响应于非特权程序的请求映射指定池之一的内存。

公开(公告)号：US20070168704A1

公开(公告)日：2007-07-19

申请号：US11289974

申请日：2005-11-30

申请人： Sean Connolly ,  Gary Allison ,  Jiangbin Luo ,  Nitin Karkhanis ,  Stephen Vivian ,  Michael Harvey

发明人： Sean Connolly ,  Gary Allison ,  Jiangbin Luo ,  Nitin Karkhanis ,  Stephen Vivian ,  Michael Harvey

IPC分类号： G06F11/00

CPC分类号： G06F11/2025

摘要： A graphical user interface based method of configuring automatic failover from a primary database system to a standby database system that is coupled to the primary database system by a network. Also coupled to the network is an observer process that is independent of the database systems and that initiates the failover process. The observer periodically pings the database systems to determine whether a failover is necessary. The graphical user interface permits a user to specify the primary and secondary database systems, configure the observer, and specify conditions under which a failover may occur and to enable automatic failover. A failover context is created from the inputs to the GUI and stored in persistent storage belonging to the database systems. If the Observer's context is stale, the Observer fetches the database system's context.

摘要翻译： 一种基于图形用户界面的方法，配置从主数据库系统到通过网络耦合到主数据库系统的备用数据库系统的自动故障转移。 还耦合到网络是独立于数据库系统并发起故障转移过程的观察者进程。 观察者会定期ping数据库系统，以确定是否需要故障转移。 图形用户界面允许用户指定主数据库和辅助数据库系统，配置观察器，并指定可能发生故障切换的条件，并启用自动故障切换。 从GUI的输入创建故障转移上下文，并存储在属于数据库系统的持久存储器中。 如果观察者的上下文过时，则观察者将获取数据库系统的上下文。