公开(公告)号：US11269744B2

公开(公告)日：2022-03-08

申请号：US16855837

申请日：2020-04-22

Applicant: NETAPP, INC.

Inventor： Parag Sarfare ,  Ananthan Subramanian ,  Szu-Wen Kuo ,  Asif Imtiyaz Pathan ,  Santhosh Selvaraj ,  Nikhil Mattankot ,  Manan Patel ,  Travis Ryan Grusecki

IPC: G06F11/20 ,  G06F11/14

Abstract: Failover methods and systems for a networked storage environment are provided. A filtering data structure and a metadata data structure are generated before starting a replay of a log stored in a non-volatile memory of a second storage node, during a failover operation initiated in response to a failure at a first storage node. The second storage node operates as a partner node of the first storage node to mirror at the log one or more write requests received by the first storage node prior to the failure, and data associated with the one or more write requests. The filtering data structure identifies each log entry and the metadata structure stores a metadata attribute of each log entry. The filtering data structure and the metadata structure are used for providing access to a logical storage object during the log replay from the second storage node.

公开(公告)号：US20210334179A1

公开(公告)日：2021-10-28

申请号：US16855837

申请日：2020-04-22

Applicant: NETAPP, INC.

Inventor： Parag Sarfare ,  Ananthan Subramanian ,  Szu-Wen Kuo ,  Asif Imtiyaz Pathan ,  Santhosh Selvaraj ,  Nikhil Mattankot ,  Manan Patel ,  Travis Ryan Grusecki

IPC: G06F11/20 ,  G06F11/14

Abstract: Failover methods and systems for a networked storage environment are provided. A filtering data structure and a metadata data structure are generated before starting a replay of a log stored in a non-volatile memory of a second storage node, during a failover operation initiated in response to a failure at a first storage node. The second storage node operates as a partner node of the first storage node to mirror at the log one or more write requests received by the first storage node prior to the failure, and data associated with the one or more write requests. The filtering data structure identifies each log entry and the metadata structure stores a metadata attribute of each log entry. The filtering data structure and the metadata structure are used for providing access to a logical storage object during the log replay from the second storage node.