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1. 发明授权

US08560577B1 Method for coordinating stats collection and analysis among multiple hosts 有权
标题翻译：用于协调多个主机之间的统计信息收集和分析的方法
公开(公告)号：US08560577B1
公开(公告)日：2013-10-15
申请号：US12834188
申请日：2010-07-12
申请人： Irfan Ahmad , Ajay Gulati
发明人： Irfan Ahmad , Ajay Gulati
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/302
摘要： Two shared data structures are maintained in a storage unit for coordinating statistic collection among multiple hosts that share the storage unit. The first data structure stores information about the number of hosts that possess slots within the second data structure and identifying information about the slots. The second data structure maintains statistics of each of the multiple hosts. By using this first data structure, hosts can be added to and deleted from the second data structure in an organized manner.
摘要翻译：两个共享数据结构保存在存储单元中，用于协调共享存储单元的多个主机之间的统计收集。第一数据结构存储关于在第二数据结构内具有时隙的主机数量的信息，并且识别关于时隙的信息。第二个数据结构维护每个多个主机的统计信息。通过使用该第一数据结构，可以以有组织的方式将主机添加到第二数据结构中并从其删除。

2. 发明授权

US08250197B2 Quality of service management 有权
标题翻译：服务质量管理
公开(公告)号：US08250197B2
公开(公告)日：2012-08-21
申请号：US12260041
申请日：2008-10-28
申请人： Ajay Gulati , Irfan Ahmad
发明人： Ajay Gulati , Irfan Ahmad
IPC分类号： G06F15/173 , G06F13/28 , G06F9/46
CPC分类号： H04L47/56 , G06F3/0659 , G06F13/161 , G06F2213/0064 , H04L1/0018 , H04L29/08099 , H04L49/90 , H04L49/901 , H04L65/601 , H04L65/80 , H04L67/1097 , H04L67/2809
摘要： A method for providing quality of service to a plurality of hosts accessing a common resource is described. The common resource may be a middle-tier or back-end server. A client IO request is received at one host of the plurality of hosts from one of a plurality clients executing as software entities on respective hosts. The host determines whether an issue queue is full. The IO request is issued to the common resource when the issue queue is not full. A current average latency observed at the host and an adjusted window size is calculated, based at least in part on the current average latency. The issue queue is resized to correspond with the adjusted window size.
摘要翻译：描述了向访问公共资源的多个主机提供服务质量的方法。公共资源可能是中间层或后端服务器。在多个客户端中的一个主机上从在相应主机上作为软件实体执行的多个客户端之一接收客户端IO请求。主机确定问题队列是否已满。当问题队列未满时，IO请求将发布到公共资源。至少部分地基于当前的平均延迟来计算在主机处观察到的当前平均延迟和调整的窗口大小。调整问题队列大小以调整窗口大小。

3. 发明授权

US08914598B2 Distributed storage resource scheduler and load balancer 有权
标题翻译：分布式存储资源调度程序和负载均衡器
公开(公告)号：US08914598B2
公开(公告)日：2014-12-16
申请号：US12566435
申请日：2009-09-24
申请人： Ajay Gulati , Irfan Ahmad , Chethan Kumar
发明人： Ajay Gulati , Irfan Ahmad , Chethan Kumar
IPC分类号： G06F12/00
CPC分类号： G06F11/3485 , G06F3/0613 , G06F3/0647 , G06F3/067 , G06F11/3433 , G06F11/3447 , G06F2201/815 , G06F2206/1012
摘要： Distributed storage resources are managed based on data collected from online monitoring of workloads on the storage resources and performance characteristics of the storage resources. Load metrics are calculated from the collected data and used to identify workloads that are migration candidates and storage units that are migration destinations, so that load balancing across the distributed storage resources can be achieved.
摘要翻译：分布式存储资源根据从存储资源的工作负载和存储资源的性能特征的在线监控收集的数据进行管理。负载指标由收集的数据计算，用于识别作为迁移目的地的迁移候选和存储单元的工作负载，从而可以实现跨分布式存储资源的负载平衡。

4. 发明授权

US08856784B2 Decentralized management of virtualized hosts 有权
公开(公告)号：US08856784B2
公开(公告)日：2014-10-07
申请号：US13159935
申请日：2011-06-14
申请人： Ajay Gulati , Irfan Ahmad , Ganesha Shanmuganathan , Carl A. Waldspurger
发明人： Ajay Gulati , Irfan Ahmad , Ganesha Shanmuganathan , Carl A. Waldspurger
IPC分类号： G06F9/455 , G06F9/50 , H04L29/08 , G06F11/34
CPC分类号： G06F9/45533 , G06F9/5088 , G06F11/3433 , G06F2201/815 , H04L67/1008
摘要： One or more embodiments of the present invention provide a technique for effectively managing virtualized computing systems with an unlimited number of hardware resources. Host systems included in a virtualized computer system are organized into a scalable, peer-to-peer (P2P) network in which host systems arrange themselves into a network overlay to communicate with one another. The network overlay enables the host systems to perform a variety of operations, which include dividing computing resources of the host systems among a plurality of virtual machines (VMs), load balancing VMs across the host systems, and performing an initial placement of a VM in one of the host systems.

5. 发明授权

US08458318B2 Quality of service management 有权
标题翻译：服务质量管理
公开(公告)号：US08458318B2
公开(公告)日：2013-06-04
申请号：US13561589
申请日：2012-07-30
申请人： Ajay Gulati , Irfan Ahmad
发明人： Ajay Gulati , Irfan Ahmad
IPC分类号： G06F15/173 , G06F13/28 , G06F9/46
CPC分类号： H04L47/56 , G06F3/0659 , G06F13/161 , G06F2213/0064 , H04L1/0018 , H04L29/08099 , H04L49/90 , H04L49/901 , H04L65/601 , H04L65/80 , H04L67/1097 , H04L67/2809
摘要： A method for managing an amount of IO requests transmitted from a host computer to a storage system is described. A current latency value of an IO request most recently removed from an issue queue maintained by the host computer in order to transmit IO requests from the host computer to the storage system is periodically determined. An average latency value is the calculated based on the current latency value and a size limit of the issue queue is adjusted based in part on the average latency value. Upon receiving an IO request from one of a plurality of client applications running on the host computer, it can then be determined whether a number of pending IO requests in the issue queue has reached the size limit and the IO request can be transmitted to the issue queue if the number of pending IO request falls within the size limit.
摘要翻译：描述用于管理从主计算机发送到存储系统的IO请求量的方法。周期性地确定最近从主计算机维护的用于将主机计算机向存储系统发送IO请求的问题队列最近移除的IO请求的当前等待时间值。平均延迟值是基于当前延迟值计算的，并且部分地基于平均延迟值来调整问题队列的大小限制。在从主计算机上运行的多个客户端应用程序中的一个客户端应用程序接收到IO请求后，可以确定发布队列中的多个待处理的IO请求是否已达到大小限制，并且IO请求可以发送到该问题如果待处理的IO请求的数量落在大小限制内，则队列。

6. 发明授权

US08417812B1 Methods and systems for detecting anomalies during IO accesses 有权
标题翻译：在IO访问期间检测异常的方法和系统
公开(公告)号：US08417812B1
公开(公告)日：2013-04-09
申请号：US12834324
申请日：2010-07-12
申请人： Ajay Gulati , Irfan Ahmad , Jyothir Ramanan , Carl A. Waldspurger
发明人： Ajay Gulati , Irfan Ahmad , Jyothir Ramanan , Carl A. Waldspurger
IPC分类号： G06F15/173
CPC分类号： H04L43/0876 , G06F3/06 , G06F11/00 , G06F11/0727 , G06F11/0757 , G06F11/3419 , G06F11/3485 , G06F2201/81 , G06F2201/815 , H04L43/0852 , H04L47/00 , H04L47/12 , H04L47/56 , H04L47/6275 , H04L67/1097 , H04L69/40
摘要： An anomaly in a shared input/ouput (IO) resource that is accessed by a plurality hosts or clients is detected when a host that is not bound by any QoS policy presents large workloads to a shared IO resource that is also accessed by hosts or clients that are governed by QoS policy. The anomaly detection triggers a response from the hosts or clients as a way to protect against the effect of the anomaly. The response is an increase in window sizes. The window sizes of the hosts or clients may be increased to the maximum window size or in proportion to their QoS shares.
摘要翻译：当未被任何QoS策略约束的主机向主机或客户端访问的共享IO资源提供大量工作负载时，会检测到由多个主机或客户机访问的共享输入/输出（IO）资源中的异常情况由QoS策略管理。异常检测触发主机或客户端的响应，作为防止异常的影响的一种方式。响应是窗口大小的增加。主机或客户端的窗口大小可以增加到最大窗口大小或者与它们的QoS份额成比例。

7. 发明授权

US07912951B2 Quality of service management 有权
标题翻译：服务质量管理
公开(公告)号：US07912951B2
公开(公告)日：2011-03-22
申请号：US12260054
申请日：2008-10-28
申请人： Ajay Gulati , Irfan Ahmad , Carl A. Waldspurger
发明人： Ajay Gulati , Irfan Ahmad , Carl A. Waldspurger
IPC分类号： G06F15/173 , G06F13/28 , G06F9/46
CPC分类号： G06F9/52
摘要： A method and system for providing quality of service to a plurality of hosts accessing a common resource is described. According to one embodiment, a plurality of IO requests is received from clients executing as software entities on one of the hosts. An IO request queue for each client is separately managed, and an issue queue is populated based on contents of the IO request queues. When a host issue queue is not full, a new IO request is entered into the host issue queue and is issued to the common resource. A current average latency observed at the host is calculated, and an adjusted window size is calculated at least in part based on the current average latency. The window size of the issue queue is adjusted according to the calculated window size.
摘要翻译：描述了一种用于向接入公共资源的多个主机提供服务质量的方法和系统。根据一个实施例，从作为主机之一上的软件实体执行的客户端接收到多个IO请求。每个客户端的IO请求队列被单独管理，并且基于IO请求队列的内容填充问题队列。当主机发出队列未满时，将向主机发出队列中输入新的IO请求，并发布给公共资源。计算在主机处观察到的当前平均延迟，并且基于当前平均延迟至少部分地计算经调整的窗口大小。根据计算的窗口大小调整问题队列的窗口大小。

8. 发明授权

US09467505B2 Saturation detection and admission control for storage devices 有权
标题翻译：存储设备的饱和度检测和准入控制
公开(公告)号：US09467505B2
公开(公告)日：2016-10-11
申请号：US12869878
申请日：2010-08-27
申请人： Ajay Gulati , Ganesha Shanmuganathan , Irfan Ahmad
发明人： Ajay Gulati , Ganesha Shanmuganathan , Irfan Ahmad
IPC分类号： G06F15/173 , H04L29/08
CPC分类号： H04L67/1008 , H04L43/0852 , H04L43/16 , H04L43/50 , H04L67/1002 , H04L67/1097
摘要： Maximum throughput of a storage unit, and workload and latency values of the storage unit corresponding to a predefined fraction of the maximum throughput are estimated based on workloads and latencies that are monitored on the storage unit. The computed metrics are usable in a variety of different applications including admission control, storage load balancing, and enforcing quality of service in a shared storage environment.
摘要翻译：基于在存储单元上监视的工作负载和延迟来估计存储单元的最大吞吐量，以及对应于最大吞吐量的预定义分数的存储单元的工作负载和延迟值。所计算的度量可用于各种不同的应用，包括准入控制，存储负载平衡和在共享存储环境中实施服务质量。

9. 发明授权

US08935500B1 Distributed storage resource scheduler and load balancer 有权
标题翻译：分布式存储资源调度程序和负载均衡器
公开(公告)号：US08935500B1
公开(公告)日：2015-01-13
申请号：US13293516
申请日：2011-11-10
申请人： Ajay Gulati , Irfan Ahmad , Carl A. Waldspurger , Chethan Kumar
发明人： Ajay Gulati , Irfan Ahmad , Carl A. Waldspurger , Chethan Kumar
IPC分类号： G06F12/00
CPC分类号： G06F11/3485 , G06F3/0613 , G06F3/0647 , G06F3/067 , G06F11/3433 , G06F11/3452 , G06F2201/815 , G06F2206/1012
摘要： Distributed storage resources having multiple storage units are managed based on data collected from online monitoring of workloads on the storage units and performance characteristics of the storage units. The collected data is sampled at discrete time intervals over a time period of interest, such as a congested time period. Normalized load metrics are computed for each storage unit based on time-correlated sums of the workloads running on the storage unit over the time period of interest and the performance characteristic of the storage unit. Workloads that are migration candidates and storage units that are migration destinations are determined from a representative value of the computed normalized load metrics, which may be the 90th percentile value or a weighted sum of two or more different percentile values.
摘要翻译：基于从存储单元上的工作负载的在线监视和存储单元的性能特征收集的数据来管理具有多个存储单元的分布式存储资源。收集的数据在感兴趣的时间段（例如拥塞的时间段）以离散的时间间隔被采样。基于在感兴趣的时间段上存储单元上运行的工作负载和存储单元的性能特性的时间相关的和来计算每个存储单元的归一化负载度量。作为迁移目的地的迁移候选和存储单元的工作负载是根据计算的归一化负载度量的代表值确定的，其可以是第90百分位值或两个或多个不同百分位数值的加权和。

10. 发明授权

US08719401B1 Decentralized input/output resource management 有权
标题翻译：分散投入/产出资源管理
公开(公告)号：US08719401B1
公开(公告)日：2014-05-06
申请号：US12834473
申请日：2010-07-12
申请人： Ajay Gulati , Irfan Ahmad , Jyothir Ramanan , Carl A. Waldspurger
发明人： Ajay Gulati , Irfan Ahmad , Jyothir Ramanan , Carl A. Waldspurger
IPC分类号： G06F15/173 , H04L12/56 , H04L12/26
CPC分类号： H04L47/283 , H04L43/00 , H04L43/0852 , H04L43/0864 , H04L47/19 , H04L47/2416 , H04L47/25 , H04L47/27 , H04L47/746 , H04L47/762 , H04L47/826 , H04L67/1097
摘要： A shared input/output (IO) resource is managed in a decentralized manner. Each of multiple hosts having IO access to the shared resource, computes an average latency value that is normalized with respect to average IO request sizes, and stores the computed normalized latency value for later use. The normalized latency values thus computed and stored may be used for a variety of different applications, including enforcing a quality of service (QoS) policy that is applied to the hosts, detecting a condition known as an anomaly where a host that is not bound by a QoS policy accesses the shared resource at a rate that impacts the level of service received by the plurality of hosts that are bound by the QoS policy, and migration of workloads between storage arrays to achieve load balancing across the storage arrays.
摘要翻译：共享的输入/输出（IO）资源以分散的方式进行管理。具有对共享资源的IO访问权的多个主机中的每一个计算相对于平均IO请求大小进行归一化的平均延迟值，并且存储所计算的归一化等待时间值以备以后使用。如此计算和存储的归一化等待时间值可以用于各种不同的应用，包括实施应用于主机的服务质量（QoS）策略，检测被称为异常的状况，其中不受 QoS策略以影响由QoS策略约束的多个主机所接收的服务等级的速率访问共享资源以及存储阵列之间的工作负载迁移以实现跨存储阵列的负载平衡。

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