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1. 发明授权

US09910893B2 Failover and resume when using ordered sequences in a multi-instance database environment 有权
公开(公告)号：US09910893B2
公开(公告)日：2018-03-06
申请号：US13309300
申请日：2011-12-01
申请人： Fulu Li , Atsushi Morimura , Michael Zoll , Vineet Marwah , Amit Ganesh
发明人： Fulu Li , Atsushi Morimura , Michael Zoll , Vineet Marwah , Amit Ganesh
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/3048
摘要： An approach is disclosed for implementing failover and resume when using ordered sequences in a multi-instance database environment. The approach commences by instantiating a first database instance initially to serve as an active instance, then instantiating a second database instance to serve as an instance of one or more passive instances. The active database establishes mastership over a sequence and then processes requests for the ‘next’ symbol by accessing a shared sequence cache only after accessing a first instance semaphore. The active instance and the passive instance perform a protocol such that upon passive database detection of a failure of the active database, one of the passive database instances takes over mastership of the sequence cache, and then proceeds to satisfy sequence value requests. The particular order is observed in spite of the failure.

2. 发明授权

US08069370B1 Fault identification of multi-host complex systems with timesliding window analysis in a time series 有权
标题翻译：多时间复杂系统的故障识别与时间序列窗口分析
公开(公告)号：US08069370B1
公开(公告)日：2011-11-29
申请号：US12830069
申请日：2010-07-02
申请人： Fulu Li , Mohsin Beg , Sameer Joshi , WeiHsin Gu , Michael Zoll , Angelo Pruscino
发明人： Fulu Li , Mohsin Beg , Sameer Joshi , WeiHsin Gu , Michael Zoll , Angelo Pruscino
IPC分类号： G06F11/00
CPC分类号： G06F11/079 , G06F11/0709 , G06F11/3409 , H04L41/0636 , H04L41/064 , H04L41/16
摘要： A method and apparatus is provided for determining the most probable cause of a problem observed in a complex multi-host system. The approach relies on a probabilistic model to represent causes and effects in a complex computing system. However, complex systems include a multitude of independently operating components that can cause temporary anomalous states. To reduce the resources required to perform root cause analysis on each transient failure, as well as to raise the confidence in the most probable cause of a failure that is identified by the model, inputs to the probabilistic model are aggregated over a sliding window of values from the recent past.
摘要翻译：提供了一种用于确定在复杂的多主机系统中观察到的问题的最可能原因的方法和装置。该方法依赖于概率模型来表示复杂计算系统中的原因和影响。然而，复杂的系统包括许多可以引起临时异常状态的独立运行的组件。为了减少对每个瞬态故障执行根本原因分析所需的资源，以及提高对由模型识别的故障的最可能原因的置信度，对概率模型的输入在值的滑动窗口上聚合从最近过去。

3. 发明授权

US09189295B2 Generating an ordered sequence in a database system using multiple interleaved caches 有权
标题翻译：使用多个交错缓存在数据库系统中生成有序序列
公开(公告)号：US09189295B2
公开(公告)日：2015-11-17
申请号：US13309356
申请日：2011-12-01
申请人： Fulu Li , Chern Yih Cheah , Michael Zoll
发明人： Fulu Li , Chern Yih Cheah , Michael Zoll
IPC分类号： G06F9/52 , G06F17/30
CPC分类号： G06F9/52 , G06F17/30348 , G06F2209/521
摘要： A method, system, and computer program product is disclosed for generating an ordered sequence from a predetermined sequence of symbols using protected interleaved caches, such as semaphore protected interleaved caches. The approach commences by dividing the predetermined sequence of symbols into two or more interleaved caches, then mapping each of the two or more interleaved caches to a particular semaphore of a group of semaphores. The group of semaphores is organized into bytes or machine words for storing the group of semaphores into a shared memory, the shared memory accessible by a plurality of session processes. Protected (serialized) access by the session processes is provided by granting access to one of the two or more interleaved caches only after one of the plurality of session processes performs a semaphore altering read-modify-write operation (e.g., a CAS) on the particular semaphore. The interleaved caches are assigned values successively from the predetermined sequence using a round-robin assignment technique.
摘要翻译：公开了一种方法，系统和计算机程序产品，用于使用受保护的交错高速缓存（例如信号量保护的交错高速缓存）从预定的符号序列生成有序序列。该方法通过将预定的符号序列划分成两个或多个交织的高速缓存，然后将两个或多个交织的高速缓存中的每一个映射到一组信号量的特定信号量来开始。信号组被组织成字节或机器字，用于将信号组存储到共享存储器中，共享存储器可由多个会话进程访问。只有在多个会话进程中的一个会话处理执行信号量改变读取 - 修改 - 写入操作（例如CAS）之后，才允许访问两个或多个交织高速缓存中的一个的缓存特别的信号量。使用循环分配技术，从预定序列连续地分配交织的高速缓存。

4. 发明授权

US08429133B2 Partial key indexes 有权
标题翻译：部分关键指标
公开(公告)号：US08429133B2
公开(公告)日：2013-04-23
申请号：US11956287
申请日：2007-12-13
申请人： Tirthankar Lahiri , Dheeraj Pandey , Juan R. Loaiza , Michael Zoll , Kiran B. Goyal , Neil J. S. Macnaughton
发明人： Tirthankar Lahiri , Dheeraj Pandey , Juan R. Loaiza , Michael Zoll , Kiran B. Goyal , Neil J. S. Macnaughton
IPC分类号： G06F7/00 , G06F17/00 , G06F17/30
CPC分类号： G06F17/30327
摘要： A partial reverse key index is described, which allows distributed contention as resources vie to insert data into an index as well as allows range scans to be performed on the index. To do so, before an index entry for a key value is inserted into an index, the key value is transformed using a transformation operation that affects a subset of the order of the key value. The index entry is then inserted based on the transformed key value. Because the transformation operation affects the order of the key value, the transformed values associated with two consecutive key values will not necessarily be consecutive. Therefore, the index entries associated with the consecutive key values may be inserted into unrelated portions of the index.
摘要翻译：描述了部分反向密钥索引，其允许分布式争用作为将数据插入到索引中的资源，并且允许在索引上执行范围扫描。为此，在将键值的索引条目插入索引之前，将使用影响键值顺序子集的转换操作来转换键值。然后基于转换的键值插入索引条目。由于转换操作影响键值的顺序，与两个连续的键值相关联的变换值不一定是连续的。因此，可以将与连续键值相关联的索引条目插入索引的无关部分。

5. 发明授权

US08391295B2 Temporal affinity-based routing of workloads 有权
标题翻译：基于时间亲和力的工作负载路由
公开(公告)号：US08391295B2
公开(公告)日：2013-03-05
申请号：US11868317
申请日：2007-10-05
申请人： Carol Colrain , Michael Zoll , Rajkumar Irudayaraj
发明人： Carol Colrain , Michael Zoll , Rajkumar Irudayaraj
IPC分类号： H04L12/56
CPC分类号： H04L67/322 , H04L45/121 , H04L45/306 , H04L67/1002 , H04L67/1008 , H04L67/327
摘要： Techniques for routing client requests among a group of nodes offering a service are described. A coordinator determines that performance could be improved by using affinity-based routing. In one embodiment, the coordinator calculates a Time-to-Live (TTL) metric whereby clients benefit by returning to the same cache and posts this hint to subscribers. Client's start preserving locality data in an affinity context, such that later requests for a connection can be routed to the location last visited. The coordinator measures the system over subsequent intervals. If the gradient of the goodness (viz service quality and capacity) is stable or improving, then the coordinator continues to advise subscribers to use the affinity-based technique. Alternatively, if the gradient of the goodness is deteriorating, then the coordinator posts advice to the subscribers to stop using the affinity-based technique for any instance during the next intervals.
摘要翻译：描述了在提供服务的一组节点之间路由客户端请求的技术。协调者决定通过使用基于亲和性的路由可以提高性能。在一个实施例中，协调器计算生存时间（TTL）度量，由此客户端通过返回到相同的高速缓存并且向用户发布该提示而受益。客户端启动在亲和性上下文中保留位置数据，以便稍后的连接请求可以路由到上次访问的位置。协调员在随后的时间间隔内测量系统。如果善意的梯度（服务质量和容量）稳定或改善，协调员将继续建议用户使用基于亲和力的技术。或者，如果善意的渐变正在恶化，则协调器向订阅者发布建议以在下一间隔期间停止对任何实例使用基于亲和力的技术。

6. 发明授权

US08370318B2 Time limited lock ownership 有权
公开(公告)号：US08370318B2
公开(公告)日：2013-02-05
申请号：US12340569
申请日：2008-12-19
申请人： Wilson Chan , Angelo Pruscino , Michael Zoll
发明人： Wilson Chan , Angelo Pruscino , Michael Zoll
IPC分类号： G06F17/00
CPC分类号： G06F9/52 , G06F17/30362
摘要： Described herein are techniques for time limited lock ownership. In one embodiment, in response to receiving a request for a lock on a shared resource, the lock is granted and a lock lease period associated with the lock is established. Then, in response to determining that the lock lease period has expired, one or more lock lease expiration procedures are performed. In many cases, the time limited lock ownership may prevent system hanging, timely detect system deadlocks, and/or improve overall performance of the database.

7. 发明申请

US20070043728A1 Optimization for transaction failover in a multi-node system environment where objects' mastership is based on access patterns 有权
标题翻译：在多节点系统环境中优化事务故障切换，其中对象的主管基于访问模式
公开(公告)号：US20070043728A1
公开(公告)日：2007-02-22
申请号：US11282327
申请日：2005-11-18
申请人： Wilson Chan , Angelo Pruscino , Stefan Roesch , Michael Zoll , Tolga Yurek
发明人： Wilson Chan , Angelo Pruscino , Stefan Roesch , Michael Zoll , Tolga Yurek
IPC分类号： G06F17/30 , G06F7/00
CPC分类号： G06F11/2046 , G06F11/203 , G06F11/2033 , G06F11/2035 , G06F11/30 , G06F2201/825 , Y10S707/99939 , Y10S707/99942 , Y10S707/99953
摘要： Techniques are provided for responding to the termination of a node executing one or more transactions by selecting another node to complete the transactions, and assigning to the selected node the affinity relationships that existed between the terminated node and the objects being accessed by said transactions.
摘要翻译：提供了通过选择另一个节点来完成事务来响应执行一个或多个事务的节点的终止的技术，并且向所选择的节点分配存在于所终止的节点和被所述事务访问的对象之间的亲和度关系。

8. 发明授权

US08429657B2 Global avoidance of hang states via priority inheritance in multi-node computing system 有权
标题翻译：通过多节点计算系统中的优先级继承来全局避免挂起状态
公开(公告)号：US08429657B2
公开(公告)日：2013-04-23
申请号：US12150393
申请日：2008-04-28
申请人： Michael Zoll , Angelo Pruscino , Wilson Chan
发明人： Michael Zoll , Angelo Pruscino , Wilson Chan
IPC分类号： G06F9/46
CPC分类号： G06F9/46 , G06F9/4818 , G06F9/5038 , G06F9/524
摘要： Systems, methods, and other embodiments associated with avoiding resource blockages and hang states are described. One example computer-implemented method for a clustered computing system includes determining that a first process is waiting for a resource and is in a blocked state. The resource that the first process is waiting for is identified. A blocking process that is holding the resource is then identified. A priority of the blocking process is compared with a priority the first process. If the priority of the blocking process is lower than the priority of the first process, the priority of the blocking process is increase. In this manner the blocking process can be scheduled for execution sooner and thus release the resource.
摘要翻译：描述了与避免资源阻塞和挂起状态相关联的系统，方法和其他实施例。用于集群计算系统的一个示例性计算机实现的方法包括确定第一进程正在等待资源并且处于阻塞状态。确定第一个进程正在等待的资源。然后识别持有资源的阻塞进程。将阻塞进程的优先级与第一进程的优先级进行比较。如果阻塞进程的优先级低于第一个进程的优先级，阻塞进程的优先级就会增加。以这种方式，可以更快地将阻塞进程安排进行执行，从而释放资源。

9. 发明申请

US20090271794A1 Global avoidance of hang states in multi-node computing system 有权
标题翻译：全局避免多节点计算系统中的挂起状态
公开(公告)号：US20090271794A1
公开(公告)日：2009-10-29
申请号：US12150393
申请日：2008-04-28
申请人： Michael Zoll , Angelo Pruscino , Wilson Chan
发明人： Michael Zoll , Angelo Pruscino , Wilson Chan
IPC分类号： G06F9/46
CPC分类号： G06F9/46 , G06F9/4818 , G06F9/5038 , G06F9/524
摘要： Systems, methods, and other embodiments associated with avoiding resource blockages and hang states are described. One example computer-implemented method for a clustered computing system includes determining that a first process is waiting for a resource and is in a blocked state. The resource that the first process is waiting for is identified. A blocking process that is holding the resource is then identified. A priority of the blocking process is compared with a priority the first process. If the priority of the blocking process is lower than the priority of the first process, the priority of the blocking process is increase. In this manner the blocking process can be scheduled for execution sooner and thus release the resource.
摘要翻译：描述了与避免资源阻塞和挂起状态相关联的系统，方法和其他实施例。用于集群计算系统的一个示例性计算机实现的方法包括确定第一进程正在等待资源并且处于阻塞状态。确定第一个进程正在等待的资源。然后识别持有资源的阻塞进程。将阻塞进程的优先级与第一进程的优先级进行比较。如果阻塞进程的优先级低于第一个进程的优先级，阻塞进程的优先级就会增加。以这种方式，可以更快地将阻塞进程安排进行执行，从而释放资源。

10. 发明授权

US07454422B2 Optimization for transaction failover in a multi-node system environment where objects' mastership is based on access patterns 有权
标题翻译：在多节点系统环境中优化事务故障切换，其中对象的主管基于访问模式
公开(公告)号：US07454422B2
公开(公告)日：2008-11-18
申请号：US11282327
申请日：2005-11-18
申请人： Wilson Wai Shun Chan , Angelo Pruscino , Stefan Roesch , Michael Zoll , Tolga Yurek
发明人： Wilson Wai Shun Chan , Angelo Pruscino , Stefan Roesch , Michael Zoll , Tolga Yurek
IPC分类号： G06F17/30 , G06F7/00
CPC分类号： G06F11/2046 , G06F11/203 , G06F11/2033 , G06F11/2035 , G06F11/30 , G06F2201/825 , Y10S707/99939 , Y10S707/99942 , Y10S707/99953
摘要： Techniques are provided for responding to the termination of a node executing one or more transactions by selecting another node to complete the transactions, and assigning to the selected node the affinity relationships that existed between the terminated node and the objects being accessed by said transactions.
摘要翻译：提供了通过选择另一个节点来完成事务来响应执行一个或多个事务的节点的终止的技术，并且向所选择的节点分配存在于被终止的节点和被所述事务访问的对象之间的亲和关系。

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