公开(公告)号：US20220317883A1

公开(公告)日：2022-10-06

申请号：US17222621

申请日：2021-04-05

Applicant: VMware, Inc.

Inventor： Jyothir Ramanan ,  Matthew B. Amdur ,  Wenguang Wang ,  Enning Xiang

IPC: G06F3/06

Abstract: Techniques for implementing dynamic base disk mirroring for linked clones are provided. In one set of embodiments, a first node in a distributed storage system can monitor a congestion level of a base disk residing on the first node, where the base disk is shared by a plurality of linked clones. Upon determining that the congestion level exceeds a threshold, the first node can send, to a second node, a request to create a mirror of the base disk on that second node. Upon receiving an acknowledgement from the second node that the mirror has been successfully created, the first node can update a mirror set associated with the base disk to include an entry identifying the mirror. The first node can then communicate the updated mirror set to one or more other nodes.

公开(公告)号：US08850004B2

公开(公告)日：2014-09-30

申请号：US13859650

申请日：2013-04-09

Applicant: VMware, Inc.

Inventor： Ajay Gulati ,  Irfan Ahmad ,  Jyothir Ramanan ,  Carl A. Waldspurger

IPC: G06F15/173 ,  G06F11/00 ,  G06F3/06 ,  H04L12/26 ,  H04L29/14 ,  H04L12/70 ,  H04L29/08

CPC classification number: 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

Abstract: An anomaly in a shared input/output (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.

Abstract translation: 当不受任何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，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。

公开(公告)号：US11481140B1

公开(公告)日：2022-10-25

申请号：US17222621

申请日：2021-04-05

Applicant: VMware, Inc.

Inventor： Jyothir Ramanan ,  Matthew B Amdur ,  Wenguang Wang ,  Enning Xiang

IPC: G06F12/00 ,  G06F3/06

Abstract: Techniques for implementing dynamic base disk mirroring for linked clones are provided. In one set of embodiments, a first node in a distributed storage system can monitor a congestion level of a base disk residing on the first node, where the base disk is shared by a plurality of linked clones. Upon determining that the congestion level exceeds a threshold, the first node can send, to a second node, a request to create a mirror of the base disk on that second node. Upon receiving an acknowledgement from the second node that the mirror has been successfully created, the first node can update a mirror set associated with the base disk to include an entry identifying the mirror. The first node can then communicate the updated mirror set to one or more other nodes.

公开(公告)号：US09509621B2

公开(公告)日：2016-11-29

申请号：US14263231

申请日：2014-04-28

Applicant: VMware, Inc.

Inventor： Ajay Gulati ,  Irfan Ahmad ,  Jyothir Ramanan ,  Carl A. Waldspurger

IPC: G06F15/16 ,  G06F15/167 ,  H04L12/841 ,  H04L12/911 ,  H04L12/923 ,  H04L12/26 ,  H04L29/08 ,  H04L12/801 ,  H04L12/807 ,  H04L12/853 ,  H04L12/825

CPC classification number: H04L47/283 ,  H04L43/00 ,  H04L43/0852 ,  H04L43/0864 ,  H04L47/19 ,  H04L47/2416 ,  H04L47/25 ,  H04L47/27 ,  H04L47/746 ,  H04L47/762 ,  H04L47/826 ,  H04L67/1097

Abstract: 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 migrating workloads between storage arrays to achieve load balancing across the storage arrays.

Abstract translation: 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接收的服务等级的速率访问共享资源，以及在存储阵列之间迁移工作负载以实现跨存储阵列的负载平衡。