Patent ID: 8180961
Filing Date: 2012-05-15
Classification: G06F,H04L

Abstract:
1. A machine implemented method for managing a right granted by a first computing node having a processor to a client computing system, associated with an input/output (I/O) operation on a data container stored in a striped volume set (SVS) at a storage device, comprising: (a) determining if the right granted to the client computing system by the first computing node is to be revoked; wherein the right is cached at a first storage volume and resident at a second storage volume; (b) sending a recall message from the first computing node to a second computing node having a processor, for revoking the right granted to the client computing device when the second storage volume is managed by the second computing node operationally coupled to the first computing node that manages the first storage volume; (c) sending the recall message by the first computing node to the client computing device for revoking the right; (d) completing any pending I/O operation after the recall message is sent to the client computing device; (e) revoking the right granted to the client computing device; and (f) invalidating a cached copy of the right at the first storage volume by the second computing node.