Method and system for handling failures by tracking status of switchover or switchback

摘要

Techniques for recovering from a failure at a disaster recovery site are disclosed. An example method includes receiving an indication to shift control of a set of volumes of a plurality of volumes. The set of volumes is originally owned by a second storage node. The first storage node is a disaster recovery partner of the second storage node. The method includes shifting control of the set of volumes. The method further includes during the shifting, changing a status of a flag corresponding to a progress of the shifting. The method also includes during a reboot of the first storage node, determining the status of the flag and determining, based on the status of the flag, whether to mount the set of volumes during reboot at the first storage node.

主权项

1. A method, comprising:
receiving, at a first storage node that is a disaster recovery partner of a second storage node, an indication to shift control of a set of volumes from the second storage node, originally owning the set of volumes, to the first storage node; shifting control of the set of volumes, wherein during the shifting, setting a status of a flag indicative of progress of the shifting before a failure of the first storage node; and during a reboot of the first storage node in response to the failure of the first storage node:
determining the progress of the shifting before the failure of the first storage node based upon the status of the flag; anddetermining whether to mount or omit mounting of the set of volumes during the reboot at the first storage node based upon the status of the flag.