公开(公告)号：US10521316B2

公开(公告)日：2019-12-31

申请号：US15803917

申请日：2017-11-06

Applicant: NetApp Inc.

Inventor： Vaiapuri Ramasubramaniam ,  Harihara Kadayam ,  Parag Sarfare ,  Yong Eun Cho ,  Chaitanya Patel ,  Hrishikesh Keremane ,  Prachi Deshmukh

IPC: G06F11/00 ,  G06F11/20

Abstract: A system and method for handling multi-node failures in a disaster recovery cluster is provided. In the event of an error condition, a switchover operation occurs from the failed nodes to one or more surviving nodes. Data stored in non-volatile random access memory is recovered by the surviving nodes to bring storage objects, e.g., disks, aggregates and/or volumes into a consistent state.

公开(公告)号：US10235059B2

公开(公告)日：2019-03-19

申请号：US14955973

申请日：2015-12-01

Applicant: NetApp, Inc.

Inventor： Chaitanya Patel ,  Shailesh Ajay Shiwalkar

IPC: G06F11/00 ,  G06F3/06 ,  G06F11/20 ,  G06F11/36

Abstract: A technique maintains consistent throughput of processing of input/output (I/O) requests by a storage system when changing configuration of one or more Redundant Array of Independent Disks (RAID) groups of storage devices, such as disks, within the storage system. The configuration of a RAID group (i.e., RAID configuration) may be represented by RAID objects (e.g., reference-counted data structures) stored in a memory of the storage system. Illustratively, the RAID objects may be organized as a RAID configuration hierarchy including a top-level RAID object (e.g., RAID group data structure) that is linked (e.g., via one or more pointers) to one or more intermediate-level RAID objects (e.g., disk and segment data structures) which, in turn, are linked to one or more low-level RAID objects (e.g., chunk data structures). According to the technique, a snapshot of a current RAID configuration (i.e., current configuration snapshot) may be created by incrementing a reference count of the current top-level object of the hierarchy and attaching (e.g., via a pointer) the current configuration snapshot to a current I/O request processed by the storage system.

公开(公告)号：US09959335B2

公开(公告)日：2018-05-01

申请号：US14560297

申请日：2014-12-04

Applicant: NetApp, Inc.

Inventor： Yong Eun Cho ,  Anuja Jaiswal ,  Vani Vully ,  Andrew Dunn ,  Chaitanya Patel ,  Susan M. Coatney

IPC: G06F17/30 ,  G06F3/06

CPC classification number: G06F17/30598 ,  G06F3/0614 ,  G06F3/0631 ,  G06F3/067 ,  G06F17/30312

Abstract: A system and method for avoiding object identifier collisions in a cluster environment is provided. Upon creation of the cluster, volume location databases negotiate ranges for data set identifiers (DSIDs) between a first site and a second site of the cluster. Any pre-existing objects are remapped into an object identifier range associated with the particular site hosting the object.

公开(公告)号：US09928148B2

公开(公告)日：2018-03-27

申请号：US14526037

申请日：2014-10-28

Applicant: NetApp, Inc.

Inventor： Harihara Kadayam ,  Hrishikesh Keremane ,  Vaiapuri Ramasubramaniam ,  Rishabh Mittal ,  Chaitanya Patel ,  Santhosh Unnikrishnan ,  Sameer Deshpande

IPC: G06F15/177 ,  G06F11/20 ,  H04L12/24 ,  H04L29/08 ,  H04L12/751 ,  H04L12/703 ,  H04L12/931

CPC classification number: G06F11/2069 ,  G06F11/2094 ,  G06F11/2097 ,  H04L41/0663 ,  H04L41/0873 ,  H04L41/0893 ,  H04L45/02 ,  H04L45/28 ,  H04L49/357 ,  H04L67/1097

Abstract: A technique efficiently configures a peered cluster storage environment. The configuration technique illustratively includes three phases: a discovery phase, a node setup phase and a cluster setup phase. The discovery phase may be employed to initiate discovery of nodes of a disaster recovery (DR) group through transmission of multicast advertisement packets by the nodes over interconnects, including a Fiber Channel (FC) fabric, to each other node of the group. In the node setup phase, each node of a cluster assigns its relationships to the nodes discovered and present in the FC fabric; illustratively, the assigned relationships include high availability (HA) partner, DR primary partner and DR auxiliary partner. In the cluster setup phase, the discovered nodes of the FC fabric are organized as the peered cluster storage environment (DR group) configured to service data in a highly reliable and available manner.

公开(公告)号：US20160085647A1

公开(公告)日：2016-03-24

申请号：US14559343

申请日：2014-12-03

Applicant: NetApp, Inc.

Inventor： Vaiapuri Ramasubramaniam ,  Harihara Kadayam ,  Parag Sarfare ,  Yong Eun Cho ,  Chaitanya Patel ,  Hrishikesh Keremane ,  Prachi Deshmukh

IPC: G06F11/20

CPC classification number: G06F11/2033 ,  G06F11/2028 ,  G06F11/2041 ,  G06F11/2046 ,  G06F2201/805

Abstract: A system and method for handling multi-node failures in a disaster recovery cluster is provided. In the event of an error condition, a switchover operation occurs from the failed nodes to one or more surviving nodes. Data stored in non-volatile random access memory is recovered by the surviving nodes to bring storage objects, e.g., disks, aggregates and/or volumes into a consistent state.

Abstract translation: 提供了一种用于处理灾难恢复集群中的多节点故障的系统和方法。 在发生错误的情况下，从故障节点到一个或多个幸存节点发生切换操作。 存储在非易失性随机存取存储器中的数据由幸存的节点恢复，以将存储对象（例如，磁盘，聚合和/或卷）带入一致的状态。

公开(公告)号：US20150269042A1

公开(公告)日：2015-09-24

申请号：US14220648

申请日：2014-03-20

Applicant: NetApp Inc.

Inventor： Abhishek Jain ,  Chaitanya Patel ,  Deepan Natesan Seeralan ,  Linda Ann Riedle

IPC: G06F11/20 ,  H04L29/08

CPC classification number: G06F11/2092 ,  G06F11/1658 ,  H04L67/1034 ,  H04L67/1097 ,  H04L67/42

Abstract: One or more techniques and/or systems are provided for load balancing between storage controllers. For example, a first storage controller and a second storage controller may be configured at a first storage site according to a high availability configuration, and may be configured as disaster recovery partners for a third storage controller and a fourth storage controller at a second storage site. If the first storage controller fails, the second storage controller provides failover operation for a first storage device. If a disaster occurs at the second storage site, the second storage controller provides switchover operation for a third storage device and a fourth storage device. Responsive to the first storage controller being restored, the third storage device may be reassigned from the second storage controller to the first storage controller for load balancing at the first storage site during disaster recovery of the second storage site.

Abstract translation: 提供了一种或多种技术和/或系统用于存储控制器之间的负载平衡。 例如，可以根据高可用性配置在第一存储站点配置第一存储控制器和第二存储控制器，并且可以将第一存储控制器和第二存储控制器配置为在第二存储站点处的第三存储控制器和第四存储控制器的灾难恢复伙伴 。 如果第一个存储控制器出现故障，则第二个存储控制器为第一个存储设备提供故障转移操作。 如果在第二存储站点发生灾难，则第二存储控制器为第三存储设备和第四存储设备提供切换操作。 响应于第一存储控制器被恢复，第三存储设备可以从第二存储控制器重新分配到第一存储控制器，以在第二存储站点的灾难恢复期间在第一存储站点进行负载平衡。