International Business Machines Corporation

Netapp, Inc.

Duen-wen Hsiao

William Boyd Brown

Derek William Beard

Rodney Carlton Burnett

Ghassan Abdallah Yammine

Jason Dillard Preston

Gregory Scott Althaus

Damon E Fleury

Systems that maintain objects created and modified within designated directories on a per-client basis in a network filesystem include a file server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory. At least one client is operably connected to the server having a remote processor and memory operably connected to the remote processor. The file server has designated at least one of the main directories as a per-client writable directory, and the file server exports the filesystem read-only to at least one client.

System that maintains objects created and modified within designated directories on a per-client basis in a network filesystem

Examples described herein include a computer system, positioned in-line with respect to a plurality of clients that actively use a source file system, to replicate a source file system on a target memory in presence of out-of-band events which after the source file system.

Detecting out-of-band (OOB) changes when replicating a source file system using an in-line system

Systems that maintain objects created and modified within designated directories on a per-client basis in a network filesystem include a file server having a local processor, memory operably connected to the local processor, a filesystem including main directories loaded into the memory, and a list of operations loaded into the memory; at least one client operably connected to the server having a remote processor and memory operably connected to the remote processor; wherein the file server has designated at least one of the main directories as a per-client writable directory; and wherein the file server has exported the filesystem read-only to at least one client.

Examples described herein include a computer system, positioned in-line with respect to a plurality of clients that actively use a source file system, to replicate a source file system on a target memory in presence of out-of-band events which alter the source file system.

A system for migrating data from a source file system to a destination file system while the source file system is in active use, in part by transitioning the client's use of the source file system to that of the destination file system without unmounting the client from the source file system.

System and method for migrating data from a source file system to a destination file system with use of attribute manipulation

A data migration system in which security policies of a source file system are preserved, in an environment in which clients actively issue communications for the source filer while data is migrated to a destination file system.

System and method for implementing data migration while preserving security policies of a source filer

A method for transparently navigating through exported file system namespaces on a server using a single mount. When an exported file system is mounted onto a client, the client creates a file system ID structure for the exported file system, wherein the file system ID structure is populated with unique properties of the exported file system, and wherein the unique properties include a file system ID. The client also creates an internal virtual file system structure for the exported file system ID structure, wherein the internal virtual file system structure includes a virtual file system ID. Once the file system and virtual file system structures are created, the client links the file system objects created within the mount to the file system ID structure until a user moves from one exported file system to a second exported file system and a new file system ID is detected.

Seamless remote traversal of multiple NFSv4 exported file systems

Provided is a method for implementing a file system that includes a combination of read-only and read/write parts. A file system located on a data server maintains an original copy of a data store. An 'Ephemeral' file system (EFS) is created on a client computer. The data server is contacted only once for each file accessed and the copy is in an original state each time the system is mounted. Changes made to the file system by one client are not seen by other clients. The EFS maintains the file system state in memory and uses the NFS server as a backing stored for cached file data. File data for files created on the client are backed up by the client system's swapping space.

Implementing an ephemeral file system backed by a NFS server

A method, system, and computer-usable medium for implementing a file directory in a server. An application including a buffer for retrieving and storing at least one entry is interfaced with the file directory. Utilizing a determined average filename length, an estimate of a number of entries among the collection of entries that can be stored by the buffer is determined. In response to determining at least one attribute data field has been requested, the number of entries that can be stored by the buffer is recalculated. Recalculating the number of entries includes determining an amount of data required for storing the collection of filenames, a collection of fixed-length attribute data fields, and a collection of variable-length attribute data fields. The recalculated number of entries is then requested from the file directory, and the buffer is loaded, with the recalculated number of entries.

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Austin, TX, United States of America

Duen-wen Hsiao