Abstract: Provided are a computer program product, system, and method for non-disruptive encoding of source data in a source data set migrated to a target data set. The source data in the source data set is migrated to a target data set by encoding the source data to produce encoded source data to copy to a target data set. In response to receiving write data for the source data set, the write data is encoded to produce encoded write data to copy to the target data set. Input/Output (“I/O”) requests to the source data set are redirected to the target data set having encoded data for the source data set.

Abstract: Provided are a computer program product, system, and method for non-disruptive encoding of source data in a source data set migrated to a target data set. The source data in the source data set is migrated to a target data set by encoding the source data to produce encoded source data to copy to a target data set. In response to receiving write data for the source data set, the write data is encoded to produce encoded write data to copy to the target data set. Input/Output (“I/O”) requests to the source data set are redirected to the target data set having encoded data for the source data set.

Abstract: A method, according to one embodiment, includes selecting a source data set for migration; determining a predicted future total space allocation based on characteristics of the source data set; determining whether a target volume is capable of accommodating the predicted future total space allocation; migrating the source data set to the target volume in response to determining that the target volume is capable of accommodating the predicted future total space allocation; and requesting an adjustment to an amount of reserved free space on the target volume based on the predicted future total space allocation.

Abstract: A method, according to one embodiment, includes selecting a source data set for migration; determining a predicted future total space allocation based on characteristics of the source data set; determining whether a target volume is capable of accommodating the predicted future total space allocation; migrating the source data set to the target volume in response to determining that the target volume is capable of accommodating the predicted future total space allocation; and requesting an adjustment to an amount of reserved free space on the target volume based on the predicted future total space allocation.

Abstract: A method for performing data set migration includes receiving a request to migrate data sets, finding the systems with the data sets open, establishing at least one I/O intercept, copying the data set, mirroring changes to the data set, updating control information in the systems with the data sets open, and terminating the at least one I/O intercept.

Abstract: A method for performing data set migration includes receiving a request to migrate data sets, finding the systems with the data sets open, establishing at least one I/O intercept, copying the data set, mirroring changes to the data set, updating control information in the systems with the data sets open, and terminating the at least one I/O intercept.

Abstract: MVS mainframe computer systems employ the ICF (Integrated Catalog Facility) catalog environment to manage numerous data sets. To provide 24×7 availability of those data sets, the BCS (250,270) must be re-organized while leaving the catalog open to access by applications. To perform a re-org while open, a data CI correlation table (500) is constructed (314) and used to lay the data CIs into a backup file in logical order (316), so that they can be loaded into the new BCS (324) without sorting, thereby reducing downtime. Additionally, if the BCS is damaged during normal operation, repair of the structure must also be performed to ensure that correct access is maintained to all data that is cataloged in the BCS. Throughout the re-org process, structural integrity checks are performed on the data and index component of the BCS, and if errors are encountered, they can be repaired.