Abstract: According to at least one embodiment, a method, a computer system, and a computer program product for minimizing I/O operations when validating databases are provided. The present invention may include creating a corresponding system-managed chain database for an application database, the chain database comprising a list of one or more dynamically allocated records, if present, for one or more fixed entries in the application database, wherein each of the fixed entries comprises a respective chain database array item in the chain database; scanning, via a validation utility, one or more chain database array items; marking each of the one or more dynamically allocated records listed in the chain database for the fixed entries as found; and checking, via an indicator with various states, if the one or more dynamically allocated records for the one or more fixed entries are listed in the respective chain database array item.

Abstract: According to at least one embodiment, a method, a computer system, and a computer program product for minimizing I/O operations when validating databases are provided. The present invention may include creating a corresponding system-managed chain database for an application database, the chain database comprising a list of one or more dynamically allocated records, if present, for one or more fixed entries in the application database, wherein each of the fixed entries comprises a respective chain database array item in the chain database; scanning, via a validation utility, one or more chain database array items; marking each of the one or more dynamically allocated records listed in the chain database for the fixed entries as found; and checking, via an indicator with various states, if the one or more dynamically allocated records for the one or more fixed entries are listed in the respective chain database array item.

Abstract: Changes in locking configurations are managed. A locking configuration includes one or more locking facilities and the one or more locking facilities include one or more locks. When a change in a locking configuration, either planned or unplanned, is detected, one or more of the locks are redistributed. For example, one or more of the locks affected by the change are moved from one or more of the locking facilities to one or more other locking facilities. This redistribution is independent of the location of the data associated with the one or more locks being moved. Thus, data and locks may be moved independently of one another and without affecting one another. Further, the redistribution can take place while the system is available or mostly available, thereby minimizing downtime.