公开(公告)号：US20170116096A1

公开(公告)日：2017-04-27

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.

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.