US 11,714,731 B2
Failover methods and system in a networked storage environment
Ratnesh Gupta, Dublin, CA (US); Kalaivani Arumugham, Sunnyvale, CA (US); Ram Kesavan, Los Altos, CA (US); and Ravikanth Dronamraju, Pleasanton, CA (US)
Assigned to NETAPP, INC., San Jose, CA (US)
Filed by NETAPP, INC., San Jose, CA (US)
Filed on Jan. 20, 2022, as Appl. No. 17/648,531.
Application 17/648,531 is a continuation of application No. 17/026,785, filed on Sep. 21, 2020, granted, now 11,249,869.
Prior Publication US 2022/0147428 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 11/20 (2006.01); G06F 11/16 (2006.01)
CPC G06F 11/2069 (2013.01) [G06F 11/1662 (2013.01); G06F 11/2064 (2013.01); G06F 11/2058 (2013.01); G06F 11/2071 (2013.01); G06F 11/2082 (2013.01); G06F 2201/82 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
quarantining, by a second storage system node, storage space likely to be used by a first storage system node for a write operation, while the second storage system node attempts to take over storage of the first storage system node during a takeover operation to take over storage of the first storage system node, the second storage system node and the first storage system node configured to operate as failover partner nodes;
copying, by the second storage system node, for a giveback operation to give back control of the storage to the first storage system node after the takeover operation, information from a second storage location to a first storage location, the first storage location assigned to the first storage system node and points to an active file system of the first storage system node and the second storage location assigned to the second storage system node for the takeover operation; and
releasing, by the second storage system node, ownership of the storage to the first storage system to complete the giveback operation.