公开(公告)号：US20220292004A1

公开(公告)日：2022-09-15

申请号：US17748277

申请日：2022-05-19

Applicant: NetApp, Inc.

Inventor： Sasidharan Krishnan ,  Kalaivani Arumugham ,  Preksha Bansal ,  Vijay Kumar Chakravarthy Ekkaladevi ,  Ryan Edward Bartlett

IPC: G06F11/20 ,  G06F11/16 ,  G06F11/14

Abstract: Techniques are provided for metadata management for enabling automated switchover in accordance with a configuration of storage solution that expresses a preference for either maintaining availability (e.g., a non-zero RPO mode) of the storage solution or avoiding data loss (e.g., a zero RPO mode). In one example, responsive to detecting a switchover trigger event, a node of a local cluster of a cross-site storage solution determines whether performance of an automated switchover from a failed cluster to a surviving cluster of the cross-site storage solution is enabled. Responsive to an affirmative determination, the node selectively proceeds with the automated switchover based on the configuration.

公开(公告)号：US11249869B1

公开(公告)日：2022-02-15

申请号：US17026785

申请日：2020-09-21

Applicant: NETAPP, INC.

Inventor： Ratnesh Gupta ,  Kalaivani Arumugham ,  Ram Kesavan ,  Ravikanth Dronamraju

IPC: G06F11/20 ,  G06F11/16

Abstract: Failover methods and systems for a storage environment are provided. During a takeover operation to take over storage of a first storage system node by a second storage system node, the second storage system node copies information from a first storage location to a second storage location. The first storage location points to an active file system of the first storage system node, and the second storage location is assigned to the second storage system node for the takeover operation. The second storage system node quarantines storage space likely to be used by the first storage system node for a write operation, while the second storage system node attempts to take over the storage of the first storage system node. The second storage system node utilizes information stored at the second storage location during the takeover operation to give back control of the storage to the first storage system node.

公开(公告)号：US09952951B2

公开(公告)日：2018-04-24

申请号：US14920275

申请日：2015-10-22

Applicant: NetApp Inc.

Inventor： Hrishikesh Keremane ,  Sravana Kumar Elpula ,  Vijay Singh ,  Kalaivani Arumugham

IPC: G06F11/20

CPC classification number: G06F11/2071 ,  G06F11/006 ,  G06F11/0778 ,  G06F11/2069 ,  G06F11/2092 ,  G06F11/2097

Abstract: One or more techniques and/or computing devices are provided for preserving coredump data. A first storage controller, of a first storage cluster, may have a disaster recovery relationship with a second storage controller of a second storage cluster. When the first storage controller fails, the first storage controller performs a coredump process to dump memory contents of the first storage controller into a storage device. During implementation of the coredump process, the first storage controller stores a storage device identifier of the storage device into a disk mailbox. Upon detecting the failure, the second storage controller reads the storage device identifier from the disk mailbox. The second storage controller performs a switchover operation to change ownership of storage devices, but excluding the storage device used by the coredump process, from the first storage controller to the second storage controller for providing clients with failover access to the storage devices.