Netapp, Inc.

Network Appliance, Inc.

Thomas Haynes

Andy Kahn

Edward Ramon Zayas

John F Gillono

Mark Muhlestein

David Noveck

Stephen William Daniel

Sreelatha Sunkara Reddy

Pranoop Erasani

Joseph Richart

Stephen Daniel

Pranoopc/o Network ApplInc Erasani

A system and method verifies and restores the consistency of inode to pathname mappings. In a first embodiment, an off-line verification procedure is modified to verify and correct the primary name inode to pathname mapping information within inodes of a file system. In a second embodiment, an on-line file system verification process is modified to verify inode to pathname mapping information upon the loading of each inode within the file system.

System and method for verifying and restoring the consistency of inode to pathname mappings in a filesystem

A system and method maintains mappings from data containers to their parent directories within a file system of a storage system. Each inode is modified to include a primary name data structure comprising a parent directory inode and a parent directory cookie value. The parent directory cookie value identifies a particular directory entry within a specified block of a directory identified by parent directory inode. An alternate name file is utilized to store alternate names, such as those associated with hard links.

System and method for maintaining mappings from data containers to their parent directories

A storage system, such as a file server, uses pathname aliasing and exports a stored resource to clients by advertising to the clients a different pathname than the actual pathname of the resource.

Aliasing of exported paths in a storage system

A method and system performs a fencing technique in a host cluster storage environment. The fence program executes on each cluster member in the cluster, and the cluster is coupled to a storage system by a network. When a cluster member fails or cluster membership changes, the fence program is invoked and a host fencing API message is sent via the network to the storage system. The storage system in turn modifies export lists to restrict further access by the failed cluster node to otherwise fence the failed cluster node off from that storage system or from certain directories within that storage system.

Client failure fencing mechanism for fencing network file system data in a host-cluster environment

A method and system performs fencing techniques in a host cluster storage environment. A fencing application program interface resides in one or more storage systems. When a message is received by said storage system from a cluster member, the storage system in turn modifies the NFS export lists of one or more storage systems to restrict further access by the failed cluster node to otherwise fence the failed cluster node off from that storage system or from certain directories within that storage system. Prior to said access permission rights being changed, NFS operations are locked and drained, NFS locks are removed after which the export lists are modified. Once the fencing operations are performed, the NFS operations are served again by the storage system.

Growing community of inventors

Tulsa, OK, United States of America

Thomas Haynes