International Business Machines Corporation

Kyle Barret Dudgeon

David C Reed

Max D Smith

Esteban Rios

Franklin Emmert McCune

Miguel Angel Perez

Dustin A Helak

Harold Steven Huber

Darrell Christopher Clarke

A method according to one embodiment includes determining to temporarily extend an initial volume to be defragmented, identifying a plurality of additional volumes pooled with the initial volume within a storage group, identifying an area on each of the plurality of additional volumes pooled with the initial volume within the storage group to use for temporarily extending the initial volume, allocating the identified area on each of the plurality of additional volumes as a temporary extension of the initial volume, including, for each of the plurality of additional volumes, creating an entry in a VTOC of the additional volume that indicates that a non-VSAM data set resides at a location of the identified area on the additional volume, setting a plurality of pointers within a VTOC of the initial volume, where the plurality of pointers includes a pointer to the identified area on additional volumes, and defragmenting the initial volume.

Temporary spill area for volume defragmentation

Provided are a computer program product, system, and method for selecting first data sets in a first storage group to swap with second data sets in a second storage group. First data sets are stored in a first storage group and second data sets are stored in a second storage group. A determination is made for a value for each of at least one of the first data sets based on at least one priority of at least one job processing I/O activity at the first data set. At least one of the first data sets for which the value was determined is selected to migrate to the second storage group based on the value.

Selecting first data sets in a first storage group to swap with second data sets in a second storage group

Various embodiments for failure recovery in a computing environment following a data restoration are provided. A catalog locate is performed for each of a plurality of data sets on a base catalog structure (BCS), identifying a plurality of BCS entries. If a first BCS entry is cataloged incorrectly, the first BCS entry is designated to be re-cataloged. The plurality of BCS entries is compared with a plurality of volume table of contents and a plurality of VSAM volume data set (VTOC/VVDS) entries. If a second BCS entry found in the plurality of BCS entries is not found in the plurality of VTOC/VVDS entries, and the second BCS entry indicates that a data set associated with the second BCS entry is located on a volume, an attempt is made to vary on the volume. If the volume cannot be varied on, a request is created to restore the volume.

Disaster recovery data sync

Provided are a computer program product, system, and method for allocating additional requested storage space for a data set in a first managed space in a second managed space. A request for additional storage space is received for a requested data set stored in a first managed space in the storage. A revised amount of storage space for the requested data set comprises at least an amount of space currently allocated to the requested data set in the first managed space and the requested additional storage space. If the revised amount of storage space exceeds a value, then allocation is made of the revised amount of storage space in allocated storage space in a second managed space of the storage. The data set is stored in the allocated storage space in the second managed space.

Allocating additional requested storage space for a data set in a first managed space in a second managed space

Provided are a computer program product, system, and method for recovering a volume table and data sets from a volume. Content from a backup volume table comprising a valid backup of a volume table from backup of the volume is processed to generate a recovery volume table for a recovery volume. The data sets in the volume are processed to determine whether they are valid. The valid data sets are moved to the recovery volume. A data recovery operation is initiated for the data sets determined not to be valid.

Recovering a volume table and data sets

A method for volume defragmentation utilizing a temporary spill area is disclosed. The method includes analyzing a volume, and, based on the analysis, determining to temporarily extend the volume. The method further includes identifying at least one area on another volume to use for temporarily extending the volume, and allocating the at least one area on the other volume as a temporary extension of the volume.

A method of and system for managing a data set stored on units of storage space in a storage facility is disclosed. The method and system may include identifying prospect extents of the data set. The prospect extents may include a first prospect extent stored on a first unit of storage space and a second prospect extent stored on a second unit of storage space. The method and system may include congregating the first prospect extent and the second prospect extent on a destination unit of storage space in the storage facility.

Data set management

A computer program product for processing an extend request for a data set in a storage facility is disclosed. The computer program product may include receiving the extend request. The extend request may include a new extent allocation amount for the data set. The data set may be associated with a number of volumes in the storage facility. The computer program product may include apportioning the new extent allocation amount among fractional amounts. The computer program product may include allocating the fractional amounts.

Volume extent allocation

Provided are a computer program product, system, and method for allowing writes to complete without obtaining a write lock to a file. A lock is provided to a first request, comprising a read or write request, to access the file. A second write request is received while the first request maintains the lock. A temporary file associated with the file for the second write request is created. The second write request is controlled to write to the temporary file while the lock is held by the first request. In response to completing the first request, the lock is granted to the second write request to write the data in the temporary file to the file.

Growing community of inventors

Vail, AZ, United States of America

Kyle Barret Dudgeon