公开(公告)号：US20230273862A1

公开(公告)日：2023-08-31

申请号：US17703307

申请日：2022-03-24

Applicant: NetApp, Inc.

Inventor： Sangramsinh Pandurang Pawar ,  Per Olov Wahlstrom ,  William Derby Dallas ,  Joseph Brown, JR. ,  Houze Xu ,  John David McA'Nulty ,  Rajesh Rajaraman

IPC: G06F11/14 ,  G06F9/4401

CPC classification number: G06F11/1451 ,  G06F11/1456 ,  G06F11/1471 ,  G06F9/4411

Abstract: Systems and methods for making use of non-persistent storage as the journaling storage media for a virtual storage system are provided. According to one embodiment, in order to meet the needs of Extreme Low Latency Workloads while also seeking to provide predictable performance and the lowest possible latency, ephemeral storage of the virtual storage system is used to preserve state information (e.g., in the form of boot arguments and an operation log journal) across a host failure recovery scenario in which the virtual storage system is expected to be redeployed within a compute instance brought up by a cloud environment of a hyperscaler on the same host, thereby providing improved data durability (fewer host failure scenarios that result in lost data) as compared to the use of ephemeral memory of the compute instance and lower write latency than the use of persistent storage provided by the cloud environment.

公开(公告)号：US20230273753A1

公开(公告)日：2023-08-31

申请号：US18168844

申请日：2023-02-14

Applicant: NetApp, Inc.

Inventor： Sangramsinh Pandurang Pawar ,  Per Olov Wahlstrom ,  William Derby Dallas ,  Houze Xu ,  Ruitao Duan ,  Rajesh Rajaraman

IPC: G06F3/06 ,  G06F9/455

CPC classification number: G06F3/0662 ,  G06F9/45558 ,  G06F3/0604 ,  G06F3/0679 ,  G06F2009/45583

Abstract: Systems and methods for flushing an operation log journal to both ephemeral storage and persistent storage during a shutdown sequence of a virtual storage system to minimize data-loss scenarios are provided. According to one embodiment, the shutdown or reboot scenarios that result in loss of data are minimized by using persistent storage as a backup to ephemeral storage when the scenario results in rehosting of virtual storage system. For example, responsive to an event indicative of an imminent shutdown or reboot of the virtual storage system, vNVRAM memory may be flushed to both ephemeral storage and persistent storage (e.g., a boot disk). In this manner, when the virtual storage system is rehosted after an unplanned shutdown or reboot resulting from an unrecoverable host error (other than an unrecoverable hardware failure), the operation log journal may be recovered from persistent storage to facilitate vNVRAM replay and avoid data loss.

公开(公告)号：US20160011950A1

公开(公告)日：2016-01-14

申请号：US14608756

申请日：2015-01-29

Applicant: NetApp, Inc.

Inventor： Joseph Caradonna ,  Rajesh Rajaraman ,  Ahmed Shihab

IPC: G06F11/20

CPC classification number: G06F11/1658 ,  G06F11/0793 ,  G06F11/2033 ,  G06F11/2056 ,  G06F11/2092 ,  G06F11/2094 ,  G06F11/2097 ,  G06F2201/805 ,  G06F2201/85

Abstract: A method, non-transitory computer readable medium, and apparatus that monitors with a passive storage controller a plurality of active storage controllers. A determination is made with the passive storage controller when a failure of one of the active storage controllers has occurred based on the monitoring. Storage device(s) previously assigned to the one of the active storage controllers are remapped to the passive storage controller. A transaction log associated with the one of the active storage controllers is retrieved with the passive storage controller from a transaction log database. Transaction(s) in the transaction log are replayed with the passive storage controller, when the failure of the one of the active storage controllers is determined to have occurred.

Abstract translation: 一种方法，非暂时性计算机可读介质，以及用无源存储控制器监视多个主动存储控制器的装置。 当基于监视发生主动存储控制器之一的故障时，确定被动存储控制器。 先前分配给一个活动存储控制器的存储设备被重新映射到被动存储控制器。 与活动存储控制器中的一个相关联的事务日志与来自事务日志数据库的被动存储控制器一起检索。 事件日志中的事务当被确定发生了一个活动存储控制器的故障时，被动存储控制器重播。

公开(公告)号：US20160011929A1

公开(公告)日：2016-01-14

申请号：US14325897

申请日：2014-07-08

Applicant: NetApp, Inc.

Inventor： Joseph Caradonna ,  Rajesh Rajaraman ,  Jason Goldschmidt

IPC: G06F11/07 ,  G06F3/06

CPC classification number: G06F3/067 ,  G06F11/1471 ,  G06F11/1474 ,  G06F11/1484 ,  G06F11/2005 ,  G06F11/202 ,  G06F11/2089

Abstract: A method, non-transitory computer readable medium and host device that monitors an active virtual storage controller. A determination of when a failure of the active virtual storage controller has occurred is made based on the monitoring. When the failure of the active virtual storage controller is determined to have occurred, one or more storage devices previously assigned to the active virtual storage controller are remapped to a passive virtual storage controller and one or more transactions in a transaction log are replayed.

Abstract translation: 一种监视活动虚拟存储控制器的方法，非暂时性计算机可读介质和主机设备。 基于监视确定发生了主动虚拟存储控制器的故障的时间。 当活动虚拟存储控制器的故障被确定已经发生时，先前分配给活动虚拟存储控制器的一个或多个存储设备被重新映射到被动虚拟存储控制器，并且重播事务日志中的一个或多个事务。