Netapp, Inc.

John Eric Hoffmann

Paul Yuedong Mu

John Russell Boyles

Nam Le

Daniel John Drake

Described herein are method and apparatus for servicing software components of nodes of a cluster storage system. During data-access sessions with clients, client IDs and file handles for accessing files are produced and stored to clients and stored (as session data) to each node. A serviced node is taken offline, whereby network connections to clients are disconnected. Each disconnected client is configured to retain its client ID and file handles and attempt reconnections. Session data of the serviced node is made available to a partner node (by transferring session data to the partner node). After clients have reconnected to the partner node, the clients may use the retained client IDs and file handles to continue a data-access session with the partner node since the partner node has access to the session data of the serviced node and thus will recognize and accept the retained client ID and file handles.

Servicing of storage device software components of nodes of a cluster storage system

A system and method for associating NIS attributes with CIFS client. Upon requesting attributes by a CIFS client, a CIFS security ID (SID) is generated for the owner and group from the NIS attributes associated with the NIS name. The generated SIDs are returned to the CIFS client. The SIDs are generated using the NIS UID or GID and a CIFS domain associated with the file server storing the referenced file.

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Pittsburgh, PA, United States of America

John Eric Hoffmann