Patent ID: 9632893
Date: 2017-04-25
CPC Classifications: G06F

Claim:
1. A method, in a data processing system, for unobtrusive failover in a clustered file system, the method comprising: periodically monitoring, by a protocol server on a given node in the clustered file system, publicized resource events from a cluster manager in the clustered file system for a triggering event that triggers a grace period; responsive to detecting a relocation event, entering, by the protocol server on the given node, a grace period without restarting the protocol server on the given node, wherein the relocation event corresponds to moving an Internet Protocol address; and during the grace period for a reclaim operation from a first client and responsive to determining the given node is a target of the relocation event, examining, by the protocol server on the given node, state records written by a node from where the Internet Protocol address has been moved; determining, by the protocol server on the given node, whether a record is found with an Internet Protocol identifier, a client identifier, and a state matching the reclaim operation; and responsive to a matching record being found, granting, by the protocol server on the given node, the reclaim operation.