International Business Machines Corporation

Google Inc.

Kevin Michael Stearns

Christopher John Stakutis

William Robert Haselton

Toby Lyn Marek

Alan L Stuart

Jennifer Martin Shaw

Disclosed are a method, system, program and data structure for implementing a records retention policy by storing selected files for designated lengths of time and then deleting them only when that time has passed. Embodiments of the invention perform this function in an efficient database-free manner. Embodiments of the invention can perform this function by utilizing existing storage directory tree functionality provided by any computer operating system organized under a retention directory coupled with a mechanism for preventing unauthorized deletions of files designated for retention. Expiration of retained files may be managed through directory structure using directory names corresponding to expiration dates determined from identified retention periods for retained files. Files may be further protected from erasure by a kernel mode process which prevents erasure of any files contained in the retention directory.

Efficient non-database file-expiration management for document retention

Provided are a method, system, and program for archiving files. A hierarchical file system having directories is provided. An archival retention policy is associated with at least one of the directories in the hierarchical file system, wherein the retention policy applies to files included in the associated directory, and wherein the retention policy specifies a retention time indicating a time period during which a file is subject to the retention policy.

Method, system, and program for archiving files

Provided are a method, system, and article of manufacture for system recovery. An operating system and a backup copy of the operating system are both maintained in a partition of a computational device. A boot loader receives an indication to load the backup copy of the operating system. The boot loader loads the backup copy of the operating system. The computational device is rebooted with the loaded backup copy of the operating system.

Method, system and article of manufacture for system recovery

Provided are a method, system, and program for processing a request to write to a source file in a storage system. A determination is made as to whether a retention rule is provided for the source file. In response to determining that one retention rule is provided for the source file, a versioned file name is generated, wherein a versioned file comprises the source file at a point-in-time. A command is transmitted to a file system to copy the source file data to a versioned file having the generated versioned file name and the generated versioned file name is added to a retention index file. The retention index file is processed to determine whether to purge versioned files according to the retention rule provided for the source file.

Method, system, and program for retaining versions of files

Method, system and program for archiving files

Provided are a system, and article of manufacture for system recovery. An operating system and a backup copy of the operating system are both maintained in a partition of a computational device. A boot loader receives an indication to load the backup copy of the operating system. The boot loader loads the backup copy of the operating system. The computational device is rebooted with the loaded backup copy of the operating system.

System and article of manufacture for system recovery

Provided are implementations for improved access to information stored on a storage device. A plurality of first nodes and a second node are coupled to one another over a communications pathway, the second node being coupled to the storage device for determining meta data including block address maps to file data in the storage device, and the first nodes being configured for accessing file data from the storage device using said meta data, wherein at least one first node caches data including meta data for a file accessed by said first node. A file application on said first node is configured to get requested file data by accessing said cached data for the file. A file notification system sends a file change notification to said first node indicating changes affecting the cached data, wherein the file application on the first node inspects the change notification to determine whether to get the requested file data directly using said cached data, whereby file accesses may be effected for an extended time with data locally cached at first nodes of the system.

Low overhead methods and apparatus for shared access storage devices

Provided are a method, system, and article of manufacture for enabling access to remote storage for use with a backup program. Access is enabled to remote storage offered by an Internet Service on a remote server over the Internet. Indication is maintained of files on a source drive in a backup set to store on the remote storage that have a real-time backup status. Te backup set is stored on the remote storage. A modification to a file on the source drive is detected and a determination is made from the indication whether the file being modified is indicated as having the real-time backup status. The modification is transferred to the file to the backup set at the remote storage in response to determining that the file being modified is indicated as having the real time status.

Enabling access to remote storage for use with a backup program

Provided are a method, system and program for maintaining and using information on updates to a data group after a logical copy is made of the data group. A first logical copy of a data group in a storage at a first point-in-time is established. The first logical copy maintains data to reconstruct the data group as of the first point-in time after the data group has been updated following the first-point-in time. Indication is made of regions of the data group updated at the storage after establishing the first logical copy. A second logical copy of the data group in the storage at a second point-in-time is established. The second logical copy maintains data to reconstruct the data group as of the second point-in time after the data group has been updated following the second point-in time. The indicated regions of the data group updated between the first and second points-in-time are saved in a change list.

Maintaining and using information on updates to a data group after a logical copy is made of the data group

Provided is a method for system recovery. An operating system and a backup copy of the operating system are both maintained in a partition of a computational device. A boot loader receives an indication to load the backup copy of the operating system. The boot loader loads the backup copy of the operating system. The computational device is rebooted with the loaded backup copy of the operating system.

Method for system recovery

Low overhead methods and apparatus shared access storage devices

A digital data processing system with improved access to information stored on a peripheral device is provided. A bypass mechanism, which executes on at least a first node (e.g., a client node), intercedes in the response to at least selected input/output, or access, requests generated by that node. The bypass transfers data designated by such requests between the first node and a peripheral device (e.g., a disk drive) over a third communications pathway, in lieu of transferring that data via a second node (e.g., a server node) and a first communications pathway (e.g., a network) between the first and second node and a second communications pathway between the second node and peripheral device. Such transfers by the bypass, however, are made using the administrative information maintained by the file system relating to storage of such data on the peripheral device.

Growing community of inventors

Maynard, MA, United States of America

Kevin Michael Stearns